Analysis of Phase-Conjugating Arrays in Multipath Environments

Takase, B.O.; Watanabe, Monte; Pang, R.N.; Akagi, Justin M.; Shiroma, G.S.; Shiroma, Wayne A.

doi:10.1109/tmtt.2008.2012299

Cited by 6 publications

(9 citation statements)

References 17 publications

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“…In [2], the authors addressed three scenarios: (i) line-ofsight (LOS) with a perfect metallic reflector located on the bottom; (ii) LOS and two perfect metallic reflectors on the top and bottom; (iii) Non-line-of-sight (NLOS) with two perfect metallic reflectors on the top and bottom.…”

Section: Experimental Multipath Environmentmentioning

confidence: 99%

“…The experiments presented in this paper only considered the LOS with a perfect metallic reflector and unlike [2], the RF source was maintained static in both monostatic and bistatic measurements. As the presented measurement procedures where performed inside a metallic shielded anechoic chamber, no metallic reflector on the floor between antennas was employed.…”

Section: Experimental Multipath Environmentmentioning

confidence: 99%

“…In order to evaluate the performance of the PCA, a modified version of the block diagram shown in [2] was utilised.To this extent, a mixer with a Local Oscillator (LO) frequency of 10 MHz and a RF frequency of 6 GHz was employed to generate the interrogating source at 6.01 GHz. However, using such mixer would result in two transmitted signals for the upper and lower side bands at 6.01 and 5.99 GHz, respectively.…”

Section: B Isolation Between the Transmitter And The Receivermentioning

confidence: 99%

“…The capability of phase conjugating arrays (PCA) to mitigate multipath effects in wireless communication systems was shown in [1], [2]. The underlying principle is based on the beam steering approach in which the PCA is capable of passively determining the angle of arrival of the incoming signal, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the impact of using a low-cost substrate such as FR4 on the implementation of a passive PCA, with similar topology as presented in [2], is evaluated. A detailed description of each development stage of the system will be presented.…”

Section: Introductionmentioning

confidence: 99%

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Passive phase conjugating array using FR4

Gomes¹,

Paraiso²,

Fernandes³

et al. 2014

2014 Loughborough Antennas and Propagation Conference (LAPC)

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This paper presents the development and construction of a low-cost passive phase conjugating array (PCA) antenna aiming the mitigation of multipath phenomena at 6 GHz. The implementation of the proposed array was performed on woven fiber glass substrate using both discrete and integrated circuits. Measurement results, obtained inside an anechoic chamber, from a 16-element PCA antenna under multipath conditions are used to validate its feasibility for vehicular applications where beam steering is required. Tests performed in the chamber yield to an average gain of 9 dB across a 120 0 angular range and peak gains of 32 dB. The relative good performance of the proposed PCA topology clearly demonstrates its benefit in mitigating multipath fading and, consequently, fade margin reduction.

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Section: Experimental Multipath Environmentmentioning

confidence: 99%

Section: Experimental Multipath Environmentmentioning

confidence: 99%

Section: B Isolation Between the Transmitter And The Receivermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Passive phase conjugating array using FR4

Gomes¹,

Paraiso²,

Fernandes³

et al. 2014

2014 Loughborough Antennas and Propagation Conference (LAPC)

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A model for non‐ideal retrodirective channels in non‐line‐of‐sight geometry

Alhassoun

2022

Electronics Letters

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Backscatter radio communication typically has less reliability than conventional radio links, hindering adaptation. Retrodirective arrays have been shown to enhance the link with gain and a recently‐observed resistance to small‐scale fading. However, the statistical advantages of retrodirective backscatter channels have only been theoretically studied for ideal, infinite arrays. This article studies practical finite retrodirective arrays and the performance of these channels using the bit‐error‐rate metric. This work shows that a significant improvement in the channel reliability can be achieved even with the modest retrodirective antenna arrays with a few individual elements.

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