Ultra-wideband Printed Monopole Antenna Research Articles

An Ultrawideband Printed Monopole Antenna Analyzed with the Theory of Characteristic Modes

In this paper, the analysis of an UWB monopole antenna using the Theory of Characteristic Modes is presented. It starts from the modal study of an asymmetric dipole (structure 1), and then complements and compares it with a broadband monopole (structure 2), aiming to understand the operation principle of the proposed antenna. To achieve this, the electromagnetic properties of the structures are analyzed through the generation of its characteristic angles, modal radiation patterns, characteristic currents, and the power contribution percentage of each mode to the total radiated power, providing a vision on how the superposition of individual characteristic modes enables UWB operation. The prototype model is fabricated, and the measured results agree very well with the full-wave simulations results. The proposed prototype has a very low profile and operates in the frequency band from 2.8 GHz to exceed 10 GHz for a reflection coefficient S11 less than -10dB.

ANALYSIS OF UWB BASED ANTENNA FOR WIRELESS COMMUNICATION

Ultra-wideband wireless communications techniques have many merits, including an extremely simple radio that inherently leads to low-cost design, large processing gain for robust operations in the presence of narrowband interference, covert operations, and fine time resolution for accurate position sensing. However, there are a number of challenges in UWB receiver design, such as capturing multipath energy, inter symbol interference especially in a non-line-of-sight environment, and the need for high-sampling-rate analog-to-digital converters. Microstrip Patch antenna (MPA) provides low profile and low volume, so it is use in a now a days communication devices. In this paper study of past few year shows that most of labour on MPA is targeted on planning compact sized microstrip antenna. A novel ultra-wideband printed monopole antenna can be used in wireless communication devices.

Frequency Notched UWB Printed Monopole Antenna with Protruding Strips inside Rectangular Slot

In this paper, a printed Ultra Wide Band (UWB) antenna of small size with variable frequency band-notched properties is presented. Finite element based HFSS software is used to simulate the proposed antenna and then fabricated. The parameters of fabricated antenna are measured with E5071C vector network analyser. The measured and simulated results are in good agreement. A stepped radiating patch is printed on one side and stepped ground plane on the other side of FR- 4 substrate to increase the bandwidth from 4.3 GHz to 11.28 GHz. Introduction of two protruding strips having a length of λ/2 in rectangular slot results to get frequency notch characteristics in WLAN (5.15–5.85 GHz) band. The effects of length and thickness of individual protruding strips on band notch characteristics are examined. By varying either the length or the thickness of protruding strips incorporated in the rectangular slot, we can control the band notch frequency and its band width. The presented antenna has a small size of 12 x 18 x 1.6 mm3and reveals a steady gain throughout the UWB except at notched band of 4.9 GHz 6.1 GHz. The radiation pattern in the E-plane and H-plane is like a figure of eight.

Compact Ultra-Wideband Printed Monopole Antenna with Inverted L-Shaped Slots for Data Communication and RF Energy Harvesting

Compact Ultra-Wideband Printed Monopole Antenna with Inverted L-Shaped Slots for Data Communication and RF Energy Harvesting

A Simple Ultra Wideband Printed Monopole Antenna With High Band Rejection and Wide Radiation Patterns

A compact ultra wideband antenna with strong notch-band rejections up to VSWR = 26, that is tunable over a wide frequency range from 3.55 GHz to 6.8 GHz, is presented. It has wide radiation patterns and yields a measured 10 dB return-loss bandwidth from 3 GHz to 10.5 GHz.

Triple band notch UWB printed monopole antenna with enhanced bandwidth

In this paper, a compact triple band-notched ultra-wideband (UWB) printed monopole antenna is proposed with enhanced bandwidth. It exhibits a stable omnidirectional radiation pattern and a dipole-like pattern in the H-plane and E-plane, respectively, for the entire UWB. The antenna consists of a rectangular patch with two bevels. To realize notch characteristics in WiMax (3.3–3.7GHz) and WLAN (5.15–5.85GHz) band, two round shaped slots of half wavelength are inserted in radiating patch. The rectangular ground plane has two bevels in upper edge to enhance bandwidth which cover the frequency range from 3 to 15GHz. The two bevels also help in getting impedance matching especially beyond 10.6GHz. A pair of C-shaped slots is etched in ground plane to get a third notch in X-band satellite communication band (7.1–7.76GHz). The effects of each individual slot on band notch characteristics are also investigated. The proposed antenna exhibits stable gain throughout the UWB and it also has a very good capability to suppress gain at notched band. Moreover, the designed antenna has a compact size of 31mm×22mm.

Two-Step Beveled UWB Printed Monopole Antenna with Band Notch

This paper presents a novel compact printed monopole ultra-wideband (UWB) antenna featured with the band notch. The proposed antenna consists of a two-step beveled radiant patch and a truncated ground plane, which can provide a good impedance matching from 3.1 GHz to 10.6 GHz. In order to generate the band-notched characteristics, two symmetrical slots are embedded along with the microstrip feeding line, resulting in a band notch from 5.05 GHz to 5.85 GHz. Accordingly, the mutual electromagnetic interference between the UWB and wireless local area network (WLAN) radio communication systems can be eliminated. In addition, it is shown how the slots integrated on the ground plane improve the radiation patterns. The experimental measurements are found to be in good agreement with the numerical simulations.

A Novel Design of Microstrip Antenna for Microwave Imaging Application

In this article, a novel ultrawideband printed monopole antenna for microwave imaging systems is presented. The proposed antenna provides a wide usable fractional bandwidth of more than 160% (2.12–17.87 GHz). The antenna has an ordinary square radiating patch, therefore displays a good omnidirectional radiation pattern even at higher frequencies and also its radiation efficiency is greater than 82% across the entire radiating band. The designed antenna has a small size of 12 × 18 mm2. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1755–1758, 2013

Highly compact UWB printed monopole antennas with different ground plane structures

AbstractThis article presents highly compact‐sized, low‐profile, and planar monopole antennas for ultra‐wideband (UWB) operations.The two proposed antennas' structures consist of the circular radiating patch with microstrip‐fed monopole structure and coplanar waveguide‐fed (CPW) monopole structure. By properly selecting positions and dimensions of the embedded slots in the radiating patch and ground planes, wide impedance bandwidths are achieved. The numerical and experimental results show that the designed antennas can operate over UWB band groups 2, 3, 4, and 5 and satellite communications. The designed antennas have the simple uniplanar structures and occupy small size of 11 × 16 mm2 including the finite ground CPW feeding mechanism and partial ground microstrip line feeding mechanism. In addition, acceptable radiation characteristics are obtained over the operating bands. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1191–1196, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27538

Ultrawideband monopole antenna for use in a circular cylindrical microwave imaging system

AbstractA novel ultrawideband printed monopole antenna for use in a circular cylindrical microwave imaging system is presented.The proposed antenna consists of a square radiating patch and a modified ground plane with an open circuit structure slit and an inverted π‐shaped parasitic structure, which provides a wide usable fractional bandwidth of more than 130% (2.91–14.72 GHz). By cutting an open circuit structure in the ground plane and also by inserting an inverted π‐shaped parasitic structure in the ground plane, additional resonances at 11.5 and 14.2 GHz are excited and hence much wider impedance bandwidth can be produced, especially at the higher band. Unlike other antennas reported in the literature to date, the proposed antenna displays a good omnidirectional radiation pattern even at higher frequencies, and also its radiation efficiency is greater than 87% across the entire radiating band. The designed antenna has a small size of 12 × 18 mm2. Simulated and measured results are presented to validate the usefulness of the proposed antenna structure for circular cylindrical microwave imaging systems. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2202–2205, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27041

An Ultra-wideband Printed Monopole Antenna with Dual Band-Notched Characteristics Using DGS and SRR

An ultra-wideband printed monopole antenna with dual band-notched characteristics is presented. The antenna consists of a split ring resonator (SRR) on the circular patch and defected ground structure (DGS) and symmetrical-slits in the coplanar ground plane. It is designed for avoiding interference with Worldwide Interoperability for Microwave Access (Wi-Max) (3.4 – 3.69GHz) and Wireless Local Area Networks (WLAN) (5.15 – 5.825GHz). Predicted impedance bandwidth of antenna is 2.70 – 10.67GHz, for VSWR < 2. Incorporation of DGS and SRR results in dual band-notched bandwidth from 3.30GHz – 3.86GHz and 5.28 – 5.89GHz respectively. The gain of antenna varies 2.48 dBi to 4.72 dBi over the operating bandwidth. In the band notched regions, the gain reduces from its normal value to about 7.94 dBi at 3.64GHz while it reduces by 4.27 dBi at 5.67GHz.

A 3.4/5.5 GHz dual‐band notched UWB printed monopole antenna with two open‐circuited stubs in the microstrip feedline

AbstractAn ultrawideband (UWB) printed monopole antenna (PMA) for the 3.4/5.5 GHz dual‐band notched operation is presented.The antenna has a rectangular radiating element with a symmetrical staircase structure in the bottom or feed region and fed by a 50‐Ω microstrip line. By introducing two open‐circuited stubs from the two sides of the microstrip feedline, dual band‐notched characteristics in the WiMAX/WLAN bands are achieved. The proposed antenna is effectively designed, simulated, fabricated, and measured providing broadband impedance matching, appropriate gain, and stable radiation pattern characteristics. An UWB and single band‐notched UWB antenna are also fabricated for comparison. The proposed UWB antenna is investigated in time domain, and it has been observed experimentally that the received fifth derivative of Gaussian pulse is not distorted in the main waveform but some amount of ringing is observed. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2973–2978, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26380

Miniature microstrip-fed ultra-wideband printed monopole antenna with a partial ground plane structure

A new microstrip-fed planar monopole antenna is presented for ultra-wideband (UWB) communication systems. The antenna structure consists of a dome-topped, bowl-shaped patch with a truncated ground plane structure. The ground plane is predominately tapered and includes a notch below the feed-line in the vicinity of the patch. The effects of dimensional parameters on the performance of the antenna have been investigated through a parametric study. Current density distribution on the antenna was also computed to gain a better insight of its behaviour. The antenna performance is validated through measurement, including its radiation patterns. The measured impedance bandwidth of the proposed antenna for |S11| ≤ −10 dB is 10.35 GHz (2.65–13.0 GHz), constituting 132% impedance bandwidth. The fabricated antenna has a compact size of 18×20×1.6 mm3. Additional features that make the antenna a suitable candidate for UWB systems are its simple configuration, compactness and low fabrication cost.

Compact UWB printed monopole antenna with dual narrow band notches for WiMAX/WLAN bands

A novel compact ultra-wideband (UWB) antenna with dual-band notched characteristics is presented. By adding a pair of Y-shaped strips to the annular ring, and etching an inverted Ω-shaped slot on the patch, dual-band notched function in the WiMAX/WLAN is achieved. Experimental results show that the designed antenna, with compact size of 24 × 28 mm 2 , has a measured impedance bandwidth of 2.91-11.4-GHz for VSWR<;2, except two frequency notched bands of 3.3-3.73 and 5.2-5.98-GHz. Moreover, this antenna exhibits very good omnidirectional radiation patterns in the H-plane.

A ring monopole antenna for UWB application

AbstractA simple and compact microstrip‐fed ultra wideband printed monopole antenna is proposed and investigated. The proposed antenna is composed of a circular‐ring fed by a microstrip line and a multistep ground. The measured bandwidth of voltage‐standing wave ratio &lt; 2 is from 3.0 to 12.0 GHz. The transfer functions of antenna systems are given experimentally. The parametric studies are performed numerically in this article. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 179–182, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24857

Compact Ultra-Wideband Antenna with Dual Band-Notched Characteristic

A compact ultra-wide band printed monopole antenna with dual band-notched characteristic is proposed. By using only one H-shaped slot etched on the radiation patch, two notched band, 3.3–3.6 GHz for WiMAX and 5.15–5.825 GHz for WLAN, are achieved. Moreover, the size adjustment of the key structure aiming at the band notched characteristic is discussed. The proposed antenna yields an impedance bandwidth of 3.1–10.6 GHz with VSWR < 2, except the notched bands. The antenna is successfully simulated and measured, showing dual band rejected characteristic can be obtained by using the only one H-shaped slot.

Compact omnidirectional band-notch ultra-wideband antenna

A novel ultra-wideband printed monopole antenna with a band-notch characteristic and stable omnidirectional radiation is presented. The antenna design adopts a bevelled square patch as a monopole, a double-feed technique and a microstrip feeder embedded with an inverted U-shaped slot. Good agreement between simulation and experiment shows that the proposed antenna achieves an impedance bandwidth of 3.05–5.15 and 6.02–10.84 GHz for VSWR≤2, a stable omnidirectional radiation and a low cross-polarisation level.

UWB planar antenna technology

Recent developments of the ultra-wideband (UWB) planar antennas are reviewed, where the progress in UWB plate monopole antennas, UWB printed monopole antennas and the UWB printed slot antennas is introduced and compared. In addition, the UWB printed antennas with the band-notched functions are also presented.

Ultrawide-band printed monopole antenna with band-notch filter

A simple and compact microstrip-fed ultrawide-band (UWB) printed monopole antenna with band-notch filter is proposed. The antenna is composed of two monopoles of the same size and a small strip bar which leads to the desired high attenuation at the notch frequency. The band-notch mechanism and current distribution of the antenna are examined. Finally, the frequency-domain characteristics, such as system transfer function and group delay, of the proposed identical monopole antenna pair are analysed to evaluate the antenna performance for UWB applications.

A Band-Notched Ultrawideband Printed Monopole Antenna

In this letter, a band-notched ultrawideband (UWB) antenna is presented and the notched-band characteristic is realized by a compact coplanar waveguide (CPW) resonant cell (CCRC). The antenna with a total size of 46 mm $,times,$30 mm operates in a band from 2.67 to over 12 GHz, and shows omnidirectional radiation patterns. Measurements indicate that the antenna presents a notched band from 5.10 to 5.94 GHz for $ VSWR ge 3:1$, which covers the wireless local area network (WLAN) band. The time-domain behaviors and the CCRC are discussed and the group delay is given experimentally. Also, parametric studies are performed numerically in the end.