Impedance Bandwidth Enhancement For UWB Slot Antenna

2007 ◽  
Author(s):  
Dau-Chyrh Chang ◽  
Ji-Chyun Liu ◽  
Bing-Hao Zeng ◽  
Ming-Yen Liu
Keyword(s):  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Bandwidth Enhancement

Design of a bandwidth enhanced hybrid slot loop antenna for GSM/UWB standards

Circuit World ◽  
2017 ◽  
Vol 43 (3) ◽  
pp. 105-110 ◽  
Author(s):  
Partibane B. ◽  
Gulam Nabi Alsath M. ◽  
Kalidoss Rajakani
Keyword(s):  
Loop Antenna ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Slot Antennas ◽  
Content Type ◽  
Bandwidth Enhancement ◽  
Microstrip Patch ◽  
Resonant Modes ◽  
Patch Load ◽  
Patch Loading

Purpose This paper aims to presents the bandwidth enhancement of a hybrid slot–loop antenna using a modified feed structure. Design/methodology/approach The conventional monopole feed of the hybrid slot–loop radiator is loaded with a flat microstrip patch to excite higher-order modes. The proposed antenna combines the resonant modes of the slot antenna, the loop antenna and the patch loading. Findings The antenna exhibits a dual-band response suitable for GSM 1800/1900 and ultrawideband (UWB) standards. The impedance bandwidth extends from 1.65 to 1.95 GHz (11.42 per cent) and 3 to 11.1 GHz (114.9 per cent). The proposed antenna has the smallest footprint with a peak gain of 5.07 dBi at 1.8 GHz and 4.97 dBi at 6 GHz. The prototype antenna is fabricated and the simulation results are validated using experimental measurements. The performance of the bandwidth-enhanced hybrid slot–loop antenna is compared with that of other slot antennas. Originality/value Thus, a hybrid slot–loop antenna with an enhanced bandwidth has been reported in this study. The conventional monopole feed of the antenna is replaced with a monopole ending with a microstrip patch load. The antenna covers the operating bands of GSM 1800/1900 and UWB. The proposed antenna has a smaller footprint compared with other wide-slot antennas reported in the literature.

scholarly journals Bandwidth Enhancement of Substrate Integrated Waveguide Cavity-backed Bow-tie-complementary-ring-slot Antenna using a Shorted-via

2018 ◽  
Vol 68 (2) ◽  
pp. 197 ◽  
Author(s):  
Arvind Kumar ◽  
S. Raghavan
Keyword(s):  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Substrate Integrated Waveguide ◽  
Radiation Characteristics ◽  
New Approach ◽  
Bandwidth Enhancement ◽  
The Individual ◽  
Better Than ◽  
Bow Tie ◽  
Good Agreement

In this study, a planar cavity-backed bow-tie-complementary-ring-slot antenna is proposed, and a new approach for bandwidth enhancement using a shorted-via is introduced. A shorted-via concept overcomes the narrow impedance bandwidth of a conventional substrate integrated waveguide cavity-backed antenna. By adjusting the location of the shorted-via (placed just above the centroid of the radiating slot), the individual bandwidth of the lower and higher order resonances has been tuned below -10 dB criterion, which results in the broadening of the bandwidth. Finally, the antenna is proficient to operate for an impedance bandwidth of 15.71 per cent, ranging from 12.02~14.07 GHz. The proposed antenna shows a gain of better than 4 dBi within the operating band with less than 0.5 dBi variation. Moreover, the antenna preserves good radiation characteristics, which is similar to that of the conventional metallic counterpart. To validate the simulated results, an antenna is fabricated and tested. The simulated results in terms of the reflection coefficient, gain, and radiation patterns are in good agreement with the measured results.

Investigations on the Microstripline-Fed Wide-Slot Antennas for Wideband Applications

2019 ◽  
pp. 56-102
Author(s):  
Krishnendu Chattopadhyay ◽  
Sekhar Ranjan Bhadra Chaudhuri
Keyword(s):  
Experimental Studies ◽  
Microstrip Antennas ◽  
Magnetic Surface ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Dual Frequency ◽  
Slot Antennas ◽  
Available Bandwidth ◽  
Bandwidth Enhancement ◽  
Radiation Properties

Microstrip patch antennas are printed antennas that find suitability because they are lightweight, low volume, thin in profile, dual frequency, and dual polarization operation, and compatible with MMIC. The objective of chapter is to exhibit the investigations on the bandwidth enhancement of microstrip antennas with special reference to microstrip-line-fed wide-slot antennas. Performances are realized and validated through experimental studies on the impedance properties by VNA and radiation properties by pattern measurement setup. An innovative method for the design of hexagonal wide-slot antenna has been proposed considering it as an equivalent magnetic surface of monopole antenna. Impedance bandwidth of the above slot antenna is enhanced through various tuning stubs. In case of forklike tuning stub, the obtained bandwidth is about 900MHz, for hexagonal stub the available bandwidth is 1751MHz. Further improvement in bandwidth is proposed through rotation of hexagonal wide slot, results in wide bandwidth of 5165 MHz covering all the WLAN and WiMAX applications.

scholarly journals DESIGN OF A WIDE SLOT ANTENNA FOR BANDWIDTH ENHANCEMENT

2012 ◽  
pp. 84-86
Author(s):  
JUGAL DESAI ◽  
HITESH DHOLAKIYA ◽  
NARESH PATEL
Keyword(s):  
Return Loss ◽  
Experimental Results ◽  
Slot Antenna ◽  
Operating Frequency ◽  
Impedance Bandwidth ◽  
Bandwidth Enhancement ◽  
Operating Bandwidth

Microstrip printed wide slot antenna with a fork like tuning stub for bandwidth enhancement is proposed in this paper. By applying fork like tuning stub to the microstrip wide slot antenna instead of line feed, it is experimentally found that operating bandwidth can be enhanced. Experimental results indicate that the impedance bandwidth, defined by -10dB return loss, of the proposed wide slot antenna can reach operating bandwidth of 3.1 GHz at operating frequency about 2 GHz which is 6 times greater than conventional wide slot antenna.

A 260-GHz on-chip cavity-backed slot antenna

2018 ◽  
Vol 11 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Jun Xiao ◽  
Zihang Qi ◽  
Xiuping Li ◽  
Weiwei Feng ◽  
Hua Zhu
Keyword(s):  
Metal Layer ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Strip Line ◽  
Total Size ◽  
Bandwidth Enhancement ◽  
Feed Line ◽  
Bicmos Technology ◽  
Sige Bicmos ◽  
On Chip

AbstractThis paper presents a cavity-backed dual-slot antenna in 0.13-μm SiGe BiCMOS technology. The dual-slot structure is excited by a cross-shaped strip line and a cavity which is formed by the topmost metal layer connected to the bottom metal layer through vias in between. By adopting dual-slot and cross-shaped feed line, the bandwidth is significantly enhanced by 196% compared with the single-slot antenna with straight feed line. The reason for bandwidth enhancement has been analyzed. The proposed antenna shows a measured impedance bandwidth of 15.2 GHz from 248.2 to 263.4 GHz for |S11| < −10 dB. The simulated and measured peak gains of the cavity-backed dual-slot antenna are −1.3 and −2.1 dBi, respectively. The simulated radiation efficiency is 31.1%. The total size of the antenna is 0.46 mm × 0.48 mm.

Dual Band Slot Antenna for 3.5 WiMAX and 5.8 WLAN

2014 ◽  
Vol 68 (1) ◽  
Author(s):  
Sahar Chagharvand ◽  
M. R. B. Hamid ◽  
M. R. Kamarudin ◽  
Mohsen Khalily
Keyword(s):  
Radiation Pattern ◽  
Coplanar Waveguide ◽  
Single Layer ◽  
Dual Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Antenna Gain ◽  
Dual Bandwidth ◽  
Electromagnetic Performance ◽  
Good Agreement

This paper presents a single layer planar slot antenna for dual band operation. The antenna is fed by a coplanar waveguide (CPW) with two inverted C-shaped resonators to achieve the dual band operation. The impedance bandwidth for ǀS11ǀ < -10dB is 14% in lower band and 7% in higher band. The antenna prototype’s electromagnetic performance, impedance bandwidth, radiation pattern, and antenna gain were measured. The proposed configuration offers a relatively compact, easy to fabricate and dual band performance providing gain between 2 and 4 dBi. The designed antenna has good dual bandwidth covering 3.5 WiMAX and 5.8 WLAN tasks. Experimental and numerical results also showed good agreement after comparison.

scholarly journals Reconfigurable 2×1 CPW-Fed Rectangular Slot Antenna Array (RSAA) Based on Graphene for Wireless Communications

2021 ◽  
Vol 36 (6) ◽  
pp. 788-795
Author(s):  
Dalia Elsheakh ◽  
Osama Dardeer
Keyword(s):  
Wireless Communications ◽  
Antenna Array ◽  
Coplanar Waveguide ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Average Gain ◽  
Rectangular Slot ◽  
High Data ◽  
Peak Gain

This article presents a 2×1 CPW ultra wideband rectangular slot antenna array (UWB-RSAA) with a modified circular slot shape to support a high data rate for wireless communications applications. The proposed antenna array dimensions are 0.7λ×0.8λo×0.064λo at the resonant frequency 1.8 GHz. It is fabricated on Rogers RO4003 substrate and fed by using a coplanar waveguide (CPW). A graphene layer is added on one side of the substrate to realize frequency reconfigurability and improve the array gain. The proposed array acquires -10 dB impedance bandwidth of the RSAA that extends from 1.7 GHz to 2.6 GHz, from 3.2 to 3.8 GHz, and from 5.2 GHz to 7 GHz. The proposed array achieved a realized peak gain of 7.5 dBi at 6.5 GHz at 0 Volt bias with an average gain of 4.5 dBi over the operating band. When the graphene bias is increased to 20 Volt, the antenna bandwidth extends from 1 GHz to 4 GHz and from 5 to 7 GHz with a peak gain of 14 dBi at 3.5 GHz and an average gain of 7.5 dBi. The linearly polarized operation of the proposed array over the operating bands makes it suitable for short-range wireless communications .

Bandwidth enhancement of a circularly polarized tapered crossed slot antenna with corner parasitic directors

2020 ◽  
Vol 30 (5) ◽  
Author(s):  
Qiming Yu ◽  
Shaobin Liu ◽  
Xiangkun Kong ◽  
Jianghong Qin ◽  
Yongdiao Wen ◽  
...  
Keyword(s):  
Slot Antenna ◽  
Bandwidth Enhancement ◽  
Circularly Polarized
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