Design Of Band Antenna Research Articles

Design of a compact T‐shaped slot antenna for wireless applications

SUMMARYIn this paper, the design of a penta‐band slot radiator for the WLAN (2.26‐2.61 GHz), WiMAX (3.14‐4.49 GHz), and C band (4‐8 GHz) antenna design and fabrication process is proposed. The proposed system (antenna) has a dielectric substrate material and radiating patch (T‐shaped) with an inverted‐L slot (both left and right sides of the feed), circle slot, and comb‐shaped ground structure on the back of the substrate. The proposed dimension of the antenna is 20 × 30 mm2, and it is designed and fabricated on FR4 substrate. It can be designed to cover the frequency bands of 2.61, 3.12, 4.32, 6.54, and 7.62 GHz. It can be designed using advanced design system (ADS) and measured using vector network analyzer (VNA). The obtained simulation result of the proposed antenna is achieved with better return loss.

A Compact Design of Ultra Wide Band Antenna with 5.5GHz to 5.9GHz Dual Band Characteristics

An innovative and compact design of microstrip antenna is introduced and presented in this Paper. The proposed patch antenna in the present paper is embedded with the square split ring resonator, Which is placed inside the circular substrate. A co-axial probe feed is used to excite the patch antenna. The proposed patch antenna is designed, and simulated using an soft HFSS simulation software. Incorporation of square SRR inside the substrate can produce sub-wave length resonant frequency. Various antenna parameters observed in this paper are VSWR, Return loss, Resonant frequency and gain. The proposed antenna produces improved results in the frequency band from 5.5GHz to 5.9GHZ. The results obtained are return loss-15dB, VSWR 1.8 and antenna gain 6.47dBi.

Active Quad band Antenna Design for Wireless Medical and Satellite Communication Applications

Active Quad band Antenna Design for Wireless Medical and Satellite Communication Applications

A Dual - Band Frequency and Polarization Reconfigurable Antenna Design

A broadside, dual- band antenna design with reconfigurable frequency and polarization is presented in this paper. The frequency and polarization tuning capacity is realized using six varactor diodes in the slots cut in the ground plane of the proposed antenna. The antenna works in L-band and X-band and can re- configure frequency from 1.576GHz to 2.035GHz in L band and from 8.524GHz to 9.082GHz in X band. It can also switch between Linear polarization and El- elliptical polarization, depending upon the states of the varactor diodes used the design. The Return loss achieved in simulation is as low as -40.841dB with im- pedance bandwidth for VSWR<2 being 429.12MHz in X-band and 123.5MHz in L-band. Due to Dual Polarization Dual Band (DPDB) with frequency tuning, the antenna can immensely enhance the overall capacity of the system without in- creasing complexity and real estate required to accommodate multiple antenna system. Thus, the proposed antenna design can find its applications in GPS, air- craft surveillance, telecommunications, space communications, RADAR, Wi- MAX IEEE 802.16d.

A Novel Approach to Design of an Ultra Wide Band Antenna for Medical Applications

A Novel Approach to Design of an Ultra Wide Band Antenna for Medical Applications

Ultra-wideband elliptical patch antenna for microwave imaging of wood

AbstractThis paper presents the design of an elliptical shape ultra-wide band antenna for imaging of wood. The antenna is constructed comprising an elliptical shape of patch loaded by a stub to resonate at lower bands, strip loading at the back, and chamfered ground. Despite having miniaturized dimensions of 20 mm × 20 mm, the proposed antenna shows better results compared to recent studies. The simulation results depict a good ultra-wide bandwidth from 2.68 to 16 GHz, and 18.2–20 GHz. Besides, the proposed antenna has two low-frequency bands at 0.89–0.92 and 1.52–1.62 GHz, maximum gain of 5.48 dB, and maximum directivity of 6.9 dBi. The measurement outcomes are performed in air, plywood, and high-density wood and show a good agreement with the simulated results done using electromagnetic simulator CST. In addition to that, the measurement results of S-parameters, transmitted and received signals show a good agreement with the simulated results. Besides, the measured results illustrate a good isolation and uniform illumination among arrays as well as the received signals' shapes do not change in different environments, but only the amplitude. Hence, the proposed antenna seems to be adequate for microwave imaging of wood.

Analysis of Slot Antenna for Wide Band

In 2016, the FCC approved four new bands for which three are licensed and one for 5 G applications is not licensed. For this application, an ultra-wide band technology needs, this electronic band could handle high-speed data for various purposes. For this frequency band, a wide band antenna design is very challenging compared to the narrow band antenna. Optimum design in a single antenna requires several factors such as radiation pattern, device size and cost In this paper, a good proposal for an antenna design with a wide operating frequency bandwidth of 31.47GHz to 39.9 GHz began. The antenna validates the gain of approximately 7dBi with VSWR at the operating frequency of 35,8 GHz.

Near-field and far-field investigation of miniaturized UWB antenna for imaging of wood

This article presents the design of a droplet shape ultra-wide band antenna for imaging of wood. The proposed antenna is designed on PTFE substrate with a dielectric constant of 2.55, loss tangent of 0.001- and 2.4-mm thickness. The antenna is loaded by a stub to resonate at lower band frequency, strip loading at the back, and a chamfered ground to increase the bandwidth. Despite having miniaturized dimensions of 15 mm × 15 mm, it shows better results compared to recent studies. The simulation results depict a good ultra-wide bandwidth from 3.26 GHz to 20 GHz, and 21.5–25 GHz; Besides, the proposed antenna has two bands at 1.25–1.35 GHz and 1.7–1.81 GHz. In addition to that, the antenna achieved a maximum gain of 5.69 dB and directivity of 7.3 dBi. The measurement results of S-parameters transmitted and received signals performed in air, plywood, and high-density wood show a good agreement with the simulated results. In addition, the measured results illustrate a good isolation and uniform illumination among arrays as well as the received signals’ shapes do not change in different environments, but only the amplitude. Hence, the proposed antenna seems to be adequate for microwave imaging of wood.

A Novel Design and Performance Analysis of an ISM Band Antenna for Biomedical Applications

Biomedical application is an advancing sector of research work which permits the development of a transmission link from a living body to an extrinsic device. A microstrip patch antenna is proposed in this paper for biomedical applications. The antenna is designed to operate in the Industrial, Scientific and Medical (ISM) band (2.4 – 2.4835 GHz). The thickness of the antenna is only 2.3 mm which implies that the antenna is reliable to operate under bent conditions. The dimension of the proposed antenna is 28.5 mm x 28.5 mm x 2.3 mm. In this antenna, Copper is used as the patch material and FR-4 is used as the substrate material. Three-layer human tissue model is used to analysis the performance of the antenna. Computer Simulation Technology (CST) software is used to designed the antenna and analysis the performance parameter of the antenna such as the return loss (S11 parameter), radiation pattern, operating frequency, directivity, gain, total efficiency under normal and bent conditions on the human tissue model. Performance analysis is also observed for different substrate material, different patch material, and different types of human tissues and comparison analysis of S11 parameter for the planar and bent condition. Among all of the substrate materials, FR4 provides the good antenna performance. Finally, Specific Absorption Rate (SAR) and thermal loss are evaluated to comply with the antenna safety issues.

Design of a compact triple band antenna with independent frequency tuning for MIMO applications

In this article, a planar, low profile microstrip line-fed triple band multiple input multiple output (MIMO) antenna is presented for WiMax (2.5/3.5/5.5 GHz)/WLAN (2.4/3.6/5.8 GHz) applications simultaneously. The single element of the MIMO antenna consists of (i) a rectangular split ring resonator (SRR), (ii) a stepped impedance resonator (SIR) inside the SRR and (iii) a slot on the SIR. Each of the resonators generates its own individual band and each band is independently tunable. The antenna exhibits three operating bands at 2.35-2.85 GHz, 3.25-3.90 GHz and 5.45-5.65 GHz. Four antenna elements are used to design the proposed MIMO antenna. The simulated results are observed and reported in terms of S-parameters, gain, radiation patterns, envelope correlation coefficient (ECC), diversity gain (DG), channel capacity loss (CCL) and total active reflection coefficient. ECC and CCL are within the acceptable range defined for 4G and 5G application standards. To validate the simulation results a prototype structure is fabricated and the measured results are compared with those obtained from the simulation.

A Design and Manufacture of Triple Band Antenna with Line and Arc shaped Strips for WLAN/WiMAX system

A Design and Manufacture of Triple Band Antenna with Line and Arc shaped Strips for WLAN/WiMAX system

Compact Dual Band Antenna Design for Ku / Ka Band Applications

This communication proposes a compact 16 GHz / 30 GHz dual band antenna design for Ku / Ka band applications. The antenna consists of two layers with lower layer having the fed patch and the upper layer having non-periodic element array. The antenna has been designed to operate at two different frequencies with compact dimensions of (8mm x 8mm) using Rogers RT 5880. The compact size of this proposed antenna also makes it suitable for integration with the microwave and millimeter wave circuits. The proposed antenna provides high radiation efficiency and a peak gain of about 8 dB at the resonant frequencies with reduced side lobe levels.

PERFORMANCE ANALYSIS OF ISM BAND ANTENNAS: A SURVEY

Initially, ISM (Industrial, Scientific and Medical) band was being allocated to Industry, Science and Medical fields but later on various applications such as Wi-Fi, Bluetooth, cordless phone etc. have been allowed to use ISM band frequencies. Different types of antennas such as a microstrip patch antenna, helical antenna, dielectric resonator antenna etc are used for the above mentioned devices. However, due to small size and weight microstrip patch antenna become dominant in this field from last few years. In this paper various antenna designs for ISM band application have been discussed with their performance analyses from various papers on which this survey is conducted. The main aim of this survey paper is to provide a background on the researches of ISM band antenna design used for different application which would help researcher in their work.

Design of a compact U-shaped slot triple band antenna for WLAN/WiMAX applications

This article presents a small, low-profile planar microstrip antenna that is applicable for both WLAN and WiMAX applications. The goal of this paper is to design an antenna which can excite triple-band operation with appreciable impedance bandwidth to combine WLAN/WiMAX communication specifications simultaneously in one device. The designed antenna has a compact size of 10×26mm2. The proposed antenna consists of an inverted U-shaped slot radiator and a defected ground plane. Overall the design method and parametric study found appropriate dimensions, which provides three distinct bands I from 2.40 to 2.52, II from 3.40 to 3.60 and III from 5.00 to 6.00GHz that covers entire WLAN (2.4/5.2/5.8GHz) and WiMAX (2.5/3.5/5.5) bands. Finally, a prototype antenna was fabricated and experimentally characterized to verify the design concept as well as to validate the simulation results. Thus the simulation results along with the measurements show that the antenna can simultaneously operate over WLAN and WiMAX frequency bands.

Wideband Antenna for HPM Measurements

The measurements of microwave pulses of gigawatt power level have a lot of constraints. A receiving antenna is a starting and core point of the measurement system. Waveguide based and dipole antennas have a limited wide bands, while the use of commercially available wideband antennas is restricted by their maximum peak power acceptances. The design of the wide band antenna with the small effective area was proposed. The characteristics of prototype were obtained in numerical simulations with ANSYS HFSS software and by calibration tests in the frequency band of 1–13 GHz. It has the effective area about the 1 mm2 in X-band and square-law dependence on the wavelength in a wide band. The cross polarization rate is more than 60 dB at the centre position and not less than 30 dB within the range of ±5° in azimuth and elevation angle. The wide beam radiation pattern forces a user to discriminate reflected signals. This antenna could greatly simplify the measurement system, replacing a set of narrow band antennas that connected to several recording channels.

Parameter-Level Data Flow Modeling Oriented to Product Design Process

In this paper, a method of data flow modeling for a product design process oriented to data parameter is proposed. The data parameters are defined, which are classified as the basic data parameters and complex data parameters. The mechanism of the mapping relationship between different forms of documents and some basic data parameters, and a data transmission based on parameters, are constructed. Aiming at the characteristics of the iterative design process, the parameters version mechanism including node modification and iteration information is proposed. The data parameters transmission relationships are represented by a parameters network model (PNM) based on a directed graph. Finally, through the table of data parameters mapping onto the workflow node and PNM, the data ports and data links in the data flow model are generated automatically by the program. Validation in the 15-meter-diameter S/Ka frequency band antenna design process of the “Reflector, Back frame and Center part design” data flow model shows that the method can effectively shorten the time of data flow modeling and improve the data transmission efficiency.

Design of a Ka Band Antenna by a New Methodology Based on Bond Graph Approach

Modern applications of antennas and RF circuits like Radio Frequency Identification, Radars, satellite communication and Wireless become very important in our lives. Modeling and studying techniques have evolved according to the requirements of these applications. In fact, these techniques can be very costly in terms of time and resources, and require great experience to solve the electromagnetic problems. For these reasons, we propose, in this paper, to develop a simple, flexible and fast methodologies based on Bond Graph approach to study, analyze and model antennas. Also, we discuss the advantages of these tools after developing their basic concepts and steps. Finally we applicate these methodologies to design and simulate a Ka band antenna structure.

Low-cost planar microwave imaging system

In this paper, the design, construction and measurements of a low-cost novel microwave imaging system, a microwave camera, is presented. The design is based on a 10 GHz transmitter using a horn antenna, an array of microstrip receive antennas and a switching network. The received data is followed by a fast down converter to baseband and a custom-designed data acquisition system and graphical interface. The system offers novelty in terms of distinguishing materials of different dielectric constants, the operating frequency band and receiver antenna design (retina). The scanning and switching stages presented in this work are also new. A prototype of the proposed system was built and used to image objects of different materials and dielectric characteristics. Using the obtained results, the performance of the system was then analysed with very encouraging results.

Ultra‐wide band antenna designs and numerical system modelling for forward‐looking GPR

ABSTRACTThis paper presents ultra‐wide band (UWB) horn feeder and parabolic reflector antenna designs, which are considered highly suitable for forward‐looking vehicle‐mounted ground‐penetrating radar (GPR) systems and time‐domain numerical modelling of impulse GPR signal radiation, wave propagation and target scattering. In this context, the partial dielectric‐loaded Vivaldi shaped TEM horn (PDVA), TEM horn fed double‐ridged horn (PDTEM‐RHA) and their compact versions are investigated, designed simulated and measured. An offset parabolic reflector antenna prototype with a compact PDTEM‐RHA feeder is proposed to reach hyper‐wide band impulse radiation performances from 500 MHz up to 15 GHz for a multi‐band forward‐looking GPR operation that can provide deep subsurface detection with high‐resolution imaging, due to a big advantage of narrowed beam widths. The antenna gain and radiation pattern performances are demonstrated with measurement results.

English

English