High Data Rate Transmission Research Articles

Low-Power High-Bandwidth Non-Polar InGaN Micro-LEDs at Low Current Densities for Energy-Efficient Visible Light Communication

Recently, the rapidly developing Internet of Things (IoT) needs to support massive connectivity with high transmission data rate, which requires IoT transmitters with high speed and low power consumption. In this work, non-polar micro-LED operating at low current density of 10 A/cm <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$^{2}$</tex-math></inline-formula> can still maintain a high bandwidth of 508 MHz and near-peak external quantum efficiency (EQE), making it promising for low-power, energy-efficient visible light communication (VLC) to address the challenge. At 10 A/cm <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$^{2}$</tex-math></inline-formula> , non-polar micro-LEDs can achieve a low power consumption and high energy efficiency, still maintaining the data rate of 0.25 Gbps. In addition, data rates of 2 Gbps and 1.1 Gbps were also successfully achieved for non-polar micro-LED operating at 320 and 50 A/cm <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$^{2}$</tex-math></inline-formula> , respectively, to evaluate the relationship between power consumption and achievable data rate. The capability of non-polar micro-LED that can realize low-power consumption and high bandwidth at low current density is expected to play a great role in the field of energy-efficient VLC, multi-function display and IoT in the future.

Waveform Design for Joint Sensing and Communications in Millimeter-Wave and Low Terahertz Bands

The convergence of radar sensing and communication applications in the millimeter-wave (mmWave) and low terahertz (THz) bands has been envisioned as a promising technology, since it incorporates high-rate data transmission of hundreds of gigabits per second (Gbps) and mm-level radar sensing in a spectrum- and cost-efficient manner, by sharing both the frequency and hardware resources. However, the joint radar sensing and communication (JRC) system faces considerable challenges in the mmWave and low-THz scale, due to the peculiarities of the propagation channel and radio-frequency (RF) front ends. To this end, the waveform design for the JRC systems in mmWave and low-THz bands with ultra-broad bandwidth is investigated in this paper. Firstly, by considering the JRC design based on the co- existence concept, where both functions operate in a time-domain duplex (TDD) manner, a novel multi-subband quasi-perfect (MS-QP) sequence, composed of multiple perfect subsequences on different subbands, is proposed for target sensing, which achieves accurate target ranging and velocity estimation, whilst only requiring cost-efficient low-rate analog-to-digital converters (A/Ds) for sequence detection. Furthermore, the root index of each perfect subsequence is designed to eliminate the influence of strong Doppler shift on radar sensing. Finally, a data-embedded MS-QP (DE-MS-QP) waveform is constructed through time-domain extension of the MS-QP sequence, generating null frequency points on each subband for data transmission. Unlike the co- existence-based JRC system in TDD manner, the proposed DE-MS-QP waveform enables simultaneous interference-free sensing and communication, whilst inheriting all the merits from MS-QP sequences. Numerical results validate the superiority of the proposed waveforms regarding the communication and sensing performances, hardware cost as well as flexibility of the resource allocation between the dual functions.

A SiC MOSFET Isolated DC/DC Converter for a Hybrid Vehicle

This article deals with development of a DC/DC converter for use as a device for charging the traction storage batteries of an unmanned vehicle with a solid-oxide fuel cell stack. A phase shift controlled 8 kW full-bridge DC/DC converter was modeled, developed, manufactured, and tested within the frame of a research work. The device operation principle is described. The device control system developed on the basis of the Cortex ARM STM32F407VGT6 controller uses original software. The software supports the converter operation in an automatic mode by receiving, from the central processor device, operation mode setting commands (including the current, voltage, and power setpoints) and transmitting the remote measurement data (input and output circuit voltages, and the power switches and housing temperatures). Communication with the vehicle central processor is performed using the CAN protocol as per the SAE J1939 standard. The CAN is a standard serial communication protocol (its support for real-time distributed control with multiplexing allows information to be exchanged between various vehicle components). The classic CAN frame format allows data transmission rates up to 1 Mbps and payloads up to 8 bytes per frame. However, the recently introduced format (a CAN flexible data transmission rate frame format) allows higher data transmission rates and payloads higher and longer than these ordinary values. The transmission rate in the developed converter is 250 kbps. The converter operates in the input voltage range from 180 to 250 V and output voltage range from 500 to 800 V. The output current limit is 10 A. The converter efficiency was estimated to be 93%.

A Knowledge Base Technique for Detecting Multiple High-Speed Serial Interface Synchronization Errors in Multiprocessor-Based Real-Time Embedded Systems

The heterogeneity of the multiple processing elements (PEs) is a feature of real-time embedded systems. General-purpose processors and several embedded processors, as well as dedicated high-speed interfaces, are among these elements. Communication between the processors is among the most significant characteristics of developing such complex systems. Furthermore, synchronization is a common issue during interprocessor communication in embedded systems. Debugging and testing such systems is time-consuming, difficult, and laborious, with the majority of the complexities centered on debugging real-time interprocessor communication, such as synchronization in terms of timing and accuracy. While the hardware design features of heterogeneous multiprocessor real-time embedded systems have received a lot of attention, the design and development of software-based solutions still have the potential to be addressed. In particular, software-based testing becomes challenging due to interprocessor communication and the synchronization of real-time applications. A knowledge-based technique that aids in testing high-speed serial interfaces in multiprocessor-based real-time embedded systems is proposed that needs debugging in real time while an application is running. It is becoming much more important to test and validate these interfaces in real time as the demand for high data transmission rates increases. The presented work uses a technique to simulate, create and enhance the knowledge base used as correlation-based error detection that reduces the development time. The proposed technique helps in detecting synchronization-related errors that occur during communication among multiple high-speed serial interfaces. The presented work also lists a series of experiments to validate the effectiveness of the proposed technique. The results show that the presented techniques are effective for error identification in real-time embedded systems.

Performance Investigation of WDM based hybrid RF-FSO Link with Unmanned Aerial Vehicles based Optical Relays

The paper presents the design of wavelength division multiplexing (WDM) based hybrid radio frequency-free space optical communication (RF-FSOC) system for high data rate transmission in the scenarios where the direct line-of-sight (LOS) view between the end-to-end communication nodes is unavailable. As such, a simulation model of unmanned aerial vehicle (UAV) based parallel relaying mechanism incorporating amplify and reflection (AR) technique is presented for establishing a point-to-point FSOC link between UAV and ground base station. Furthermore, the power spectral characteristics of the WDM optical signals modulated by 8-PAM signalling scheme at the transmitter node of the proposed model is simulated and analysed in the Optisystem 16. The simulation results illustrate that the overall link length of the proposed UAV based hybrid system with 1 Gbps data rate and transmitted beam divergence angle of 10 mrad extends upto a maximum range of 200 m in light fog condition.

Secure Optical Communication Using a New 5D Chaotic Stream Segmentation

According to its complex properties like ergodicity, unpredictability, and sensitivity to its initial states, chaotic systems are ‎attracting more and more attention and are widely used for security purposes. Moreover, ‎the chaotic signals are considered suitable for spread spectrum modulation due to their wideband properties. It is able to reduce the peak to average ‎power ratio (PAPA). This paper presents a new Dynamic Diffeo-Difference Multi-Dimensional (DDD-MD) system. It is used as ‎a key for a new cryptosystem designed based on the chaotic stream segmentation (CSS) method. The proposed ‎system provides the best trade-off between efficiency, robustness, and high data rate transmission. The behavior of the ‎proposed chaotic system is evaluated numerically by analyzing the Lyapunov exponent spectrum, complexity, and attractor ‎phase diagram. Besides, it is practically assessed based on the principle of system ‎circuit design; the circuit diagram of the system is prepared and simulated by Multisim, which shows high consistency with ‎the numerical simulation. These evaluations show that the proposed system has a rich dynamics behavior to be realized in ‎an encryption system and provides a foundation for many engineering and physical applications‎.

Characterization of high impedance of multilayer coplanar waveguide transmission line design for integration with nanodevices

Terahertz technology has recently attracted the attention of the researchers due to its wide range of applications such as security and military, biomedicine and health care, astronomy and biology. There are many scrutinized research papers among the terahertz applications with nanodevices such as self-switching devices. They need monolithic microwave integrated circuits for integration. It is evident that the system impedance of transmission lines is 50 Ω. However, the main limitation of self-switching diodes is high level of impedance in megaohms which is a huge value and is not so easy to implement. Paper focuses on the design and simulation of the coplanar waveguide transmission line structures with higher impedance by applying multilayer technology for the integration with self-switching diodes. Using multilayer technology in design allows wide range of impedances. Two approaches have been targeted such that meets all the requirements of integration with nanodevice. First approach is a widening the gap of the polyimide dielectric layers used in the fabrication of these components. Several design structures have been considered such as positioning the location of signal and grounds contacts with respect to the position of the dielectric layers. As the result the highest characteristic impedance of about 90 Ω was achieved at operating frequency of 110 GHz. Secondly, novel coplanar waveguide transmission line structure was investigated where the V – shape structure was joined with the signal elevated structure. The terahertz application research may effect on high data transmission rate of no less than 10 GBit/s and thereby in increase of traffic volume.

Circular shape monopole antenna with modified ground plane proclaiming SWB characteristics

Abstract Modern communication systems require an antenna with miniaturized size and large bandwidth with high data rate. In this article, a circular monopole antenna is presented with hexagonal patch on both sides of microstrip feedline and an I- shaped rectangular slot etched at the center of feedline to provide impedance matching. The modified loaded ground reduces the coupling between ground plane and radiation patch. This antenna has compact dimension of 30 mm × 25 mm with electrical size of 0.25λ × 0.20λ. This antenna has been designed and simulated in HFSS commercial software and fabricated on FR4 substrate of thickness 1.6 mm with relative permittivity 4.4, loss tangent of 0.02. The experimental results are compared with simulated one, which are in close agreement. It attains a frequency band ranging from 2.4 to 56.6 GHz with reflection coefficient &lt;−10, percentage bandwidth of 183.72%, Bandwidth Ratio (BR) 23.58:1, and Bandwidth Dimension Ratio (BDR) of 3674.40. The peak gain and radiation efficiency of this antenna is 12.77 dBi and 98.82% at 45.84 and 5.6 GHz respectively. Time domain analysis has been done, which proclaims that the proposed antenna has SWB characteristics. It may be useful for high data rate transmission, medical imaging, and other SWB applications.

Design and performance analysis of WDM-FSO communication system using Polarization Shift Keying

Abstract FSO is the best communication medium for data transmission because of its high bandwidth, effective deployability and maximum transmission data rates with very high security. In this research paper an optical network model has been designed in the optisystem for different modulation schemes with WDM to enhance the capacity of the system. Attenuations for different weather conditions in Dehradun have been calculated and the performance has been evaluated accordingly. The performance is analysed in terms of BER (Bit Error Rate), maximum Q-factor, and eye height for each of the modulation schemes at different transmission distances and different weather attenuations. Analysis comprehends that the polarization shift keying is the best modulation technique for the WDM-FSO communication network among all. Thus, we suggest a model for an optical communication network using WDM and PolSK modulation scheme for Dehradun (Uttarakhand), where internet service is not very easy due to its extreme weather variations and got the excellent performance.

On-Board Wide Broad Bandwidth Switching Linear and Planar Antenna Arrays for Industrial Use in an Era of Industrial Revolution

The paper outlines the analysis of horn antenna and arrays of microstrip antenna for onboard high data rate transmission in the X-Band ( 10 Ghz). The antenna arrays consists of eight equispaced linear array elements with beam formation and gain of 20 dB. In satellite communication, we require the transmission of waves which are circularly polarized. This is achieved by placing helical antenna elements, which has the advantage that the antenna is broadband and transmission is circularly polarized. This paper also considers method of feeding the linear array, where only a first few elements produce radiation and the pattern is highly distorted. Linear array feed from both ends will produce uniform excitation so that the entire array is excited, with low distortion of pattern.

A deep learning driven hybrid beamforming method for millimeter wave MIMO system

The hybrid beamforming is a promising technology for the millimeter wave MIMO system, which provides high spectrum efficiency, high data rate transmission, and a good balance between transmission performance and hardware complexity. The most existing beamforming systems transmit multiple streams by formulating multiple orthogonal beams. However, the Neural network Hybrid Beamforming (NHB) adopts a totally different strategy, which combines multiple streams into one and transmits by employing a high-order non-orthogonal modulation strategy. Driven by the Deep Learning (DL) hybrid beamforming, in this work, we propose a DL-driven non-orthogonal hybrid beamforming for the single-user multiple streams scenario. We first analyze the beamforming strategy of NHB and prove it with better Bit Error Rate (BER) performance than the orthogonal hybrid beamforming even with the optimal power allocation. Inspired by the NHB, we propose a new DL-driven beamforming scheme to simulate the NHB behavior, which avoids time-consuming neural network training and achieves better BERs than traditional hybrid beamforming. Moreover, our simulation results demonstrate that the DL-driven non-orthogonal beamforming outperforms its traditional orthogonal beamforming counterpart in the presence of sub-connected schemes and imperfect Channel State Information (CSI).

Performance Analysis of Cell-Free Massive MIMO System with Network-Assisted Full-Duplex under Time-Shifting Pilot Scheme

A network-assisted full-duplex (NAFD) system based on a cell-free (CF) massive multiple-input, multiple-output (MIMO) framework has been proposed to satisfy the demands of higher data transmission rates and efficient communication. However, pilot contamination may occur due to the reuse of pilot sequences in a massive MIMO. With this consideration, we raise an asynchronous channel estimation method based on an uplink and downlink time-shifting pilot-sending scheme, which is able to avoid pilot sequence reuse when obtaining channel state information (CSI), while the data signals could be transmitted simultaneously at the same frequency. The transmission processes of the proposed method above are divided into three phases, including pilot phase, estimation phase, and data phase, in chronological order. When the uplink is in pilot phase, the corresponding downlink is in data phase and vice versa. After the channel state information estimation, both uplinks and downlinks are in data phase. The maximum ratio combination (MRC) receiver and the maximum ratio transmission (MRT) precoding are adopted in the uplink and downlink. The closed-form expressions are derived based on large-scale random matrix theory. We compared our asymptotic results with practical results in simulation, and find that they are well matched. Moreover, the proposed method is superior to the normal time-division duplex (TDD) system.

SDN and NFV for QoE-driven multimedia services delivery: The road towards 6G and beyond networks

The concept for developing the future mobile communication systems has been explored in recent years with a vision towards 5G and 6G systems. Meeting performance targets such as higher data rate transmission, lower end-to-end latency, higher capacity, lower cost, and satisfied Quality of Experience (QoE) for delivered services is the key for the success of 5G and 6G networks. Within these performance targets and associated enabling technologies, QoE and the overall management of multimedia services is the one which has been less well addressed for 5G in the past. This paper provides a comprehensive and ground-breaking discussion regarding QoE management in the context of future softwarized 5G/6G networks. We introduce a generalized QoE provisioning ecosystem for emerging multimedia streaming services in softwarized 5G/6G and beyond networks. We explore potential network softwarization and communication technologies that will enable the end-user’s QoE in 5G/6G. We further provide promising use case scenarios regarding (a) QoE-driven management of multimedia services over multi-access cloud/edge softwarized and virtualized 5G networks, (b) QoE monitoring for large traffic variations in business, residential and public areas in 5G networks, along with a Machine Learning (ML)-based softwarized controller for QoE provisioning over 5G/6G networks. We build on the achievements of 5G networks to provide the roadmap towards the development of 6G and beyond networks in terms of requirements, use case scenarios and service classes. We also present potential technologies that will be dominant through 2025–2030 in shaping the vision of 6G and beyond networks including (a) self-driving 3D network architecture, (b) network management, automation and orchestration, and (c) pervasive artificial intelligence. Moreover, we provide challenges and research directions in 6G and beyond wireless communication systems. The paper provides the first roadmap towards the management, orchestration and monitoring of multimedia 3D services in 6G and beyond networks. The comprehensive goal of this paper is to encourage researchers from the industry and academia to work together towards the realization of softwarized 6G and beyond networks while tackling the critical research challenges regarding the management of emerging 3D multimedia services and applications. The comments made by the authors in this paper are expectations on 6G, and the standardization of 6G where these aspects will be decided in 6G networks and beyond, will be started soon by different standardization bodies and fora.

PAPR Reduction for Different O-OFDM in VLC Using -Law Companding and Convolutional Encoder

Researchers have extensively utilized optical orthogonal frequency division multiplexing (O-OFDM) in visible light communication (VLC) to achieve high data rate transmission for free spectrum bandwidth. The peak-to-average power ratio (PAPR) is the critical challenge for VLC systems-based O-OFDM that produces non-linearity and degrades performance. In this paper, a proposed model for PAPR reduction can be applied with different O-OFDM technologies. This model considered using -law companding with O-OFDM transmitter to compress high amplitude peaks and restore the signals using de-companding in the receiver. The obtained simulation results show an efficient achievement of about 75% PAPR reduction compared with the original O-OFDM for different techniques. Furthermore, The convolutional encoder with Viterbi decoder is used with our proposed model for improvement BER performance and tradeoff with PAPR. The BER performance for different coding schemes, O-OFDM technologies, and modulation orders has been graphed and compared. It can notice the convolutional encoder/Viterbi satisfies better BER than Hamming coding/decoding. However, the number of memory cells of the convolutional encoder plays an essential role in BER improvement. Index Terms— ACO-OFDM, ADO-OFDM, DCO-OFDM, PAPR, VLC.

Visible Light Communication for Vehicle Monitoring

Abstract: High number of accidents had been placed all over the world due to the collision between automobile vehicles. According to the report of the world health organization (WHO), road traffic crashes results in the death of approximately 1.3 million people around the world each year with non-fatal injuries. Therefore, vehicle and people safety are very important. The idea is to propose of reducing the accidents in our daily lives and to avoid accident between vehicles. This involves arresting the human errors and technical failures of vehicles in prior. The hazardous situation can be overcome if there is a proper communication protocol used in all vehicles and depending upon the driver’s position controls. There are various vehicular methods and protocols are available. These radio frequency (RF) based communication ideas have some limitations i.e. data interference, spectrum break and security issues. These drawbacks can be overcome by using Visible Light Communication. This produces high frequency bandwidth, standard security, interference reduction and high speed data rate. Visible Light Communication is a data communication system which uses visible light for high rate data transmission and receiving operation. This method of technology is called as Light Fidelity (Li-Fi). Through this proposed system, it will slow down the vehicle and gives an alert to the driver also it gives an emergency stop. Even though an accident occurs, SMS will be sending along with location to Public service provider. This presents the highly accurate method to avoid accidents between two vehicles. Keywords: Li-Fi safety, Accident detecting and alert system, Automatic flagging system, Emergency stop system.

Performance analysis of novel precoding matrix techniques for optical OFDM-based visible light communication systems

Visible Light Communication (VLC) exploits the renowned modulation scheme like orthogonal frequency division multiplexing (OFDM) to accomplish high data rate transmission. However, the optical OFDM system like DC biased optical OFDM (DCO-OFDM) is vulnerable to high peak to average power ratio (PAPR) which results in detrimental clipping distortion which in turn degrades the overall system performance. The limited dynamic range of the LEDs further agitates this issue. On these grounds, PAPR reduction techniques like precoding matrix schemes have been proposed for reducing the high amount of PAPR in DCO-OFDM system. In this paper, discrete Hartley Matrix transform (DHMT) precoded discrete Hartley transform (DHT)-based DCO-OFDM system is proposed for reducing PAPR. In addition, we comparatively investigate the PAPR performance of a new precoding technique like T- transform which is a hybrid combination of Walsh Hadamard transform (WHT) and Zadoff chu transform (ZCT) with other precoding matrix techniques like discrete cosine matrix transform (DCMT), discrete Fourier matrix transform (DFMT), Walsh Hadamard Matrix transform (WHMT) and DHMT. Furthermore, this paper derives the mathematical analysis corresponding to the time-domain signal formats for the precoded DCO-OFDM system which is exploiting complex Fourier signal processing and real trigonometric transform like DHT. From the simulated results, it can be surmised that when compared with other precoding techniques, DHMT precoded DHT-based DCO-OFDM system not only achieves a significant reduction in PAPR but also achieves a better bit error rate (BER) and spectral efficiency performance. Furthermore, less computational complexity is required to implement it.

Hybridization of zero forcing-minimum mean square error equalizer in multiple input multiple output system

Transmission of high data rate over multipath environment is associated with many wireless applications. However, this transmission results in high delay which leads to ISI distortion and causes high error. The existing LE in MIMO systems such as ZF equalizer used in addressing this problem reduces the ISI distortion completely but results in noise amplification. Likewise, MMSE equalizer only reduces the noise but cannot eliminate ISI. Therefore, this paper proposed a hybrid LE for Wi-Fi over Weibull fading channel. The hybridized ZF-MMSE equalizer was developed using conventional ZF and MMSE equalizers. Digital transmitted signal propagated over Weibull fading channel is received at the receiver through multiple antennas and then combined using MRC. The combined signal is then equalized using hybrid ZF-MMSE to eliminate both the ISI and the amplified noise. The developed model was simulated in MATLAB software environment and evaluation was performed using BER and Pout. The results obtained revealed that the hybrid ZF-MMSE equalizer gave better performance over existing equalizers in a MIMO system. Therefore, the proposed equalizer will help improve the performance of the Wi-Fi technology.

Near-Field Focusing Multibeam Geodesic Lens Antenna for Stable Aggregate Gain in Far-Field

The millimeter-wave band is a very attractive frequency band for the new generations of mobile cellular networks, i.e. 5G and 6G, due to its potential to support extremely high data rate transmissions. Innovative antenna solutions are needed to relieve the higher free space attenuation at these frequencies. Here, we propose a multibeam antenna based on a geodesic lens with stable aggregate gain characteristics in the far-field. An analytical model based on the physical path of the rays inside the lens is applied to achieve the field distribution in the aperture of the lens. This method is used to find the profile of a near-field focusing lens with a widened beam in the far-field. As a proof of concept, a seven-beam antenna has been designed. Due to the rotational symmetry of the geodesic lens, the antenna beams present similar characteristics over an extended sectorial coverage. The lens antenna has been manufactured, and its near-field focusing features were validated. The prototype has been assessed also in the far-field with a good agreement between model, simulations, and measurements. The main novelty of this prototype is to achieve a multiple beam coverage within <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\pm 67^\circ $ </tex-math></inline-formula> in the H-plane and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\pm 20^\circ $ </tex-math></inline-formula> in the E-plane, with a gain roll-off smaller than 2 dB at 30 GHz and smaller than 3 dB at 35 GHz. These results validate the stable aggregate gain characteristics in the far-field of the proposed solution.

2:1 Multiplexer Design Using Lector, LCnmos, LCpmos Power Reduction Techniques with 45nm, 90nm, 180nm CMOS Technology

Today’s modern communication requires high data transmission rate and low power consumption. One of the most common concept of data transmission can be achieved by Multiplexers. The Multiplexers are the logic designs where data can be transmitted by n number of inputs over transmission path based on the selection line producing the single input. The application of Multiplexers is more active in communications system. AlsoLow power consumption and high-speed result is the major concern for choosing the digital circuits [1,2]. Here we designed 2:1 Multiplexer using CMOS technology with 45nm, 90nm, 180nm. Since CMOS offers less power consumption, we can till reduce the power consumed by using power reduction techniques. In this paper we designed and compared the 2:1 Multiplexer using Lector, LCnmos and LCpmos power reduction techniques.

Dual‐band dual‐mode monopole/spiral central antenna for WBAN applications

AbstractThis paper introduces a new design for a wireless body area network (WBAN) antenna employed as a body central antenna. The role of this central antenna is to receive the data from the on‐body and in‐body biosensors working at 2.45 GHz and transmit it off‐body to a worldwide interoperability for microwave access (WiMax) antenna at 5.8 GHz. The central antenna is a composite structure constructed from a spiral antenna attached to the tip of a monopole. It operates in two modes, on‐body mode at 2.45 GHz to receive data from the on‐body and in‐body biosensors and off‐body mode at 5.8 GHz to transmit data to WiMax. The antenna has a compact size and lightweight with total dimensions of 12 × 12 × 8.5 mm and a 10.8% bandwidth (BW) at 2.45 GHz to communicate with in‐ and on‐body biosensors, and wider BW of 23% at 5.8 GHz to allow for high data transmission rates to the WiMax. The radiation pattern is broadside circular symmetric at the lower operating frequency and balloon‐like with high gain at the upper‐frequency band. The gain at the lower‐ and upper‐frequency bands is 4.9 and 7.1 dBi, respectively. A prototype is fabricated for the monopole/spiral body central antenna. Experimental measurements for the reflection coefficient and the radiation patterns are performed showing good agreement with the simulation results.