Compact Antennas With Reduced Self Interference for Simultaneous Transmit and Receive

Makar, Gregory; Kim, Daniel; Tran, Nghi H.; Karacolak, Tutku

doi:10.2528/pierc17051205

Cited by 12 publications

(7 citation statements)

References 16 publications

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“…However, many of these proposed architectures are large in size and large‐power requirements make them inappropriate for full‐duplex communications on compact and power‐efficient systems. In our previous work [4], we presented an antenna that proposes a cancellation technique using probe feeding and all four ports of a 180° ring hybrid, resulting in a system with high isolation at the centre frequency (∼−53 dB) and low cross‐polarisation. The design achieved >40 dB cancellation within the band of operation.…”

Section: Introductionmentioning

confidence: 99%

“…The design achieved >40 dB cancellation within the band of operation. In this Letter, we propose an altered design that improves the isolation bandwidth of the proposed technique in [4]. Measurements show that the proposed technique provides an additional 30 MHz bandwidth while maintaining a stable isolation of at least −50 dB in the band of interest.…”

Section: Introductionmentioning

confidence: 99%

“…The measured cancellation has a maximum near 60 dB at 2.45 GHz, however, the isolation is never <50 dB within the band of operation. Compared to [4], the current design achieves an additional 10 dB isolation and has better bandwidth in a slightly smaller size. Both designs have comparable values for peak gain, efficiency, and cross-polarisation.…”

mentioning

confidence: 99%

“…The bottom layer is composed of the same FR4 substrate as was used in the creation of the top layer and has the patch antenna printed on it. In the previous design [4], the difference input port of the hybrid was used as the transmit port while the sum input port was connected to the receive port. The patch antenna was differentially excited using two out-of-phase probes.…”

mentioning

confidence: 99%

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Dual‐polarised patch antenna for in‐band full‐duplex applications

2018

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A probe-fed patch antenna with 180°ring hybrid is proposed for in-band full-duplex applications. The proposed antenna consists of two substrate layers with the ground plane in between. A patch is printed on one substrate opposite the ground, and a ring hybrid is printed on a second substrate, which is designed to separate the receiving and transmitting signals, producing high isolation between the two. Simulated and fabricated prototype results show isolation of −58 dB covering the Industrial, Scientific and Medical (ISM) band of 2.4-2.5 GHz with a centre frequency of 2.45 GHz.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Dual‐polarised patch antenna for in‐band full‐duplex applications

2018

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“…In real application, both transmit and receive signals will produce small signals that can cross‐polarise and interfere with orthogonal signals. Additional technique, such as symmetry manipulation, is employed to attempt to reach a high level of isolation between these signals [5]. By attaching both antennas to a single module, a compact planar antenna system can be designed.…”

Section: Introductionmentioning

confidence: 99%

Planar patch antenna system with high isolation for full‐duplex applications

Nguyen

Karacolak

2019

Electron. lett.

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In this Letter, a differential-fed planar antenna system is presented with large isolation between transmission and reception ports for full-duplex applications. The proposed system contains two antenna pairs, each of which is composed of two identical single-ended microstrip patch antennas operating at 12 GHz. Each element in the array is fed 180°out-of-phase by utilising rat-race hybrid couplers making the whole system differential-fed. The patch antenna array and the hybrid ring couplers are designed on two separate substrate materials with the ground plane in between. Simulation results show high isolation S 21 , − 70 dB through the entire band of interest while measured results approach S 21 , − 50 dB in a reflective environment. The design also exhibits good impedance matching, reasonable gain values, and high efficiency.

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Characterization of dual‐polarized monostatic patch antennas for full‐duplex applications

Nawaz

Niazi

2020

Engineering Reports

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This paper presents the characterization of two different dual‐polarized monostatic (shared radiator) antennas. As an example, the design and implementation of two dual‐polarized 2.4 GHz patch antennas are presented in this paper for in‐band full‐duplex (IBFD) or single‐channel full‐duplex (SCFD) wireless applications. Both the antennas use orthogonal feeding ports but differ in feeding structures. The effect of the shape of radiating patch (square shape vs circular shape) on interport RF isolation characteristics of dual‐polarized patch antenna is studied along with the effect of the feeding position on interport isolation of dual‐polarized square‐shaped patch with thin quarter‐wave microstrip feeds. The simulated interport isolation results for monostatic and bistatic dual‐polarized antennas are compared. The simulation results show the effect of slot length, slot width, stub length, size of patch, and feed line on intended frequency of operation for the single‐port slot‐coupled patch antenna. Finally, the performance of two dual‐polarized implemented antennas is analyzed by comparing the measured interport isolation (S12) results at a required operating frequency around 2.4 GHz. The implemented antenna with thin co‐planar quarter‐wave microstrip feeds provides 43 dB interport isolation, while the dual‐port slot‐coupled IBFD antenna has 70 dB interport isolation at the center frequency. The slot fed antenna provides > 55 dB port to port isolation within 10 dB return loss bandwidth of 50 MHz. The dimensions of the implemented antennas are 68 mm x 68 mm x 1.6 mm and 68 mm × 68 mm × 3.2 mm, respectively. Due to the use of high‐loss FR‐4, the radiation efficiencies and gains of both antennas are around 60% and 4 dBi, respectively. The novelty and contribution of this work are the design, implementation, and detailed analysis of two dual‐polarized compact antennas for full‐duplex applications.

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Compact Antennas With Reduced Self Interference for Simultaneous Transmit and Receive

Cited by 12 publications

References 16 publications

Dual‐polarised patch antenna for in‐band full‐duplex applications

Dual‐polarised patch antenna for in‐band full‐duplex applications

Planar patch antenna system with high isolation for full‐duplex applications

Characterization of dual‐polarized monostatic patch antennas for full‐duplex applications

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