Broadband Circularly Polarized Antenna With L-shaped Strip Feeding and Shorting-Pin Loading

Wu, Jianjun; Ren, Xueshi; Wang, Zedong; Yin, Yingzeng

doi:10.1109/lawp.2014.2354050

Cited by 53 publications

(33 citation statements)

References 12 publications

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“…using an L‐shaped monopole antenna element. However, the 3‐dB AR‐BW of the antennas is less than 50%. By etching an inverted U‐shaped strip and an open‐loop design in the ground plane, the 3‐dB AR‐BW was enhanced up to 62% and 65.2%, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Broadband circularly polarized printed monopole antenna with protruded L‐shaped and inverted L‐shaped strips

Chandu

Karthikeyan²

2017

Micro & Optical Tech Letters

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A novel approach in the design of broadband circularly polarized antennas is presented in this article. The design uses a simple monopole structure with a triangular tapered feed. Right-/left-hand circular polarization (CP) is achieved by protruding L-shaped strip and inverted Lshaped strip along the left/right radiating edge of the monopole. It is proposed that the 3-dB axial ratio bandwidth (AR-BW) can be enhanced when the length of these strips is equal to k g /4 at the center frequency of their respective CP bands. This principle is verified by fabricating the prototype on 1 mm thick FR4 substrate occupying a compact area of 0.19 k 0 3 0.19 k 0 . From the measurement results, it is observed that the overlapped bandwidth (S 11 210 dB and AR 3 dB) of the antenna is 129.04% (1.38-6.4 GHz) which covers all the major WLAN bands including the WiMAX. The proposed antenna has bidirectional radiation characteristics with a broadside gain of 3.49 dBic in the CP band. K E Y W O R D Saxial ratio bandwidth, broadband circular polarization, printed monopole antenna, protruded strips

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Section: Introductionmentioning

confidence: 99%

“…Several designs have been proposed to create wider operating bandwidths for CP antennas . These antennas either require complex feeding structures or multiple vias.…”

Section: Introductionmentioning

confidence: 99%

Broadband circularly polarized printed monopole antenna with protruded L‐shaped and inverted L‐shaped strips

Chandu

Karthikeyan²

2017

Micro & Optical Tech Letters

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“…However, such implementation for onboard CP-SAR sensor poses several challenges considering existing mechanical vibrations that may affect the antenna structural stability and overall performance. Other methods employing a single-feed proximitycoupled microstrip line in antenna feeding modification have been reported in [13][14][15][16] to broaden IBW. Although dual-feed technique can provide better stability of the CP wave than single-feed, the latter provides a simpler feeding and reduced fabrication costs in array configuration.…”

Section: Introductionmentioning

confidence: 99%

Development of a Low Profile Wide-Bandwidth Circularly Polarized Microstrip Antenna for C-Band Airborne Cp-Sar Sensor

Santosa¹,

Sumantyo²,

Urata³

et al. 2018

PIER C

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Abstract-In this paper, a low-profile wide bandwidth circularly polarized microstrip antenna is proposed as element for a C-band airborne circularly polarized synthetic aperture radar sensor. Several bandwidth improvement techniques were proposed and implemented. In order to increase impedance bandwidth, the antenna is constructed using double-stacked substrate with low dielectric constant, modified radiating shape for multi-resonant frequency, and a circle-slotted parasitic patch. Generation of the circularly polarized wave employs a simple square patch with curve corner-truncation as radiating element. The asymmetric position of the feeding is attempted to improve the axial-ratio bandwidth. To avoid a complicated feed network, the antenna is fed by single-feed proximity-coupled microstrip line. The effect of copper-covering on the upper layer for decrease undesired radiation wave emitted by the feeding is also studied and presented. Measurement results show that the impedance bandwidth and axial ratio bandwidth are 20.9% (1,100 MHz) and 4.7% (250 MHz), respectively. Meanwhile the measured gain is 7 dBic at the frequency of 5.3 GHz.

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“…One approach to enhance both types of bandwidth is through use of thick substrates [10], which tend to support strong surface waves, and consequently, diffraction by the edges of the ground plane resulting in strong back radiation. Other approaches include use of shorting pins or alternative feeding mechanisms [4,11,12], parasitic elements [13][14][15], or even metasurfaces [16].…”

Section: Introductionmentioning

confidence: 99%

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

Nestoros¹,

Christou²,

Polycarpou³

2017

PIER C

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Abstract-The primary objective of this paper is to design a high-gain, circularly polarized patch antenna suitable for Radio Frequency Identification (RFID) readers that operate in the FCC and ETSI bands . These designs will be used in a healthcare application to provide tag identification for thousands of medicines stored on shelves inside a pharmaceutical warehouse. Consequently, it is important that these antennas provide sufficient electromagnetic coverage and polarization diversity in order to boost tag readability and minimize item identification errors. The proposed RFID reader antenna design begins with a single patch with truncated corners on air substrate in order to help us understand the effect of various geometrical parameters on critical antenna figures of merit. A stub is introduced in order to improve the impedance matching characteristics of the antenna. The wideband characteristic of the design, for both impedance matching and axial ratio, is achieved by a second truncated-corner patch antenna positioned on top of the first one. An optimum design is achieved by changing the heights of the main and parasitic patches, the size of the truncated corners, and the probe position. The final antenna designs are verified by comparing measurement and simulation results.

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Broadband Circularly Polarized Antenna With L-shaped Strip Feeding and Shorting-Pin Loading

Cited by 53 publications

References 12 publications

Broadband circularly polarized printed monopole antenna with protruded L‐shaped and inverted L‐shaped strips

Broadband circularly polarized printed monopole antenna with protruded L‐shaped and inverted L‐shaped strips

Development of a Low Profile Wide-Bandwidth Circularly Polarized Microstrip Antenna for C-Band Airborne Cp-Sar Sensor

Design of Wideband, Circularly Polarized Patch Antennas for Rfid Applications in the FCC/Etsi Uhf Bands

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