A Comparative Investigation of Conventional and Dual Differential-Fed 2×2 Phased Arrays

Zhou, Wenyu; Kedze, Kam Eucharist; Javanbakht, Nima; Abdullah, Shakeeb; Shaker, J.; Xiao, Gaozhi; Amaya, Rony E.

doi:10.1109/ap-s/usnc-ursi47032.2022.9886437

Cited by 1 publication

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All the RMS errors contribute to amplitude and phase imbalance at the excitation ports of the antenna. Previously, a better than 60dB isolation was shown between the two differential pairs, resulting in an AR of nearly 0dB for both CP states, and an AR of nearly 60dB for all four LP states [18]. The theoretical result was achieved under the assumption of no amplitude and phase imbalance at any excitation of the system.…”

Section: Introductionmentioning

confidence: 83%

“…It is noticed that the equivalent reflection coefficients are independent of any value of α, β, θ 1 , and θ 2 . As a result, the dual differential fed patch antenna is capable of achieving six polarization states [17], [18], shown in Table 1.…”

Section: Table 1 Amplitude and Phase Configurations Of The Dual Diffe...mentioning

confidence: 99%

“…|γ | ≤ 0.05 (18) this results in RF power imbalanced insertion loss of 0.44dB. Similarly, the imbalanced amplitude γ between two differential pairs, rather than between individual ports, is analyzed.…”

Section: Analysis Of Dual Differential Fed Pairs With Amplitude Imbal...mentioning

confidence: 99%

“…The theoretical result was achieved under the assumption of no amplitude and phase imbalance at any excitation of the system. The radiation of the proposed phased array system produced an almost ideal AR with immunity from mutual coupling and benefiting from the unique dual differential fed mechanism and absolute symmetry [18]. As a result, the only factor causing potential degradation of AR for the proposed dual differential fed patch antenna is the amplitude and phase imbalance from the feeding network and RF chain RMS errors.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impact of Amplitude and Phase Imbalance on Dual Differential Fed Patch Antenna With High Isolation

Zhou

Abdullah

Labossiere

et al. 2022

IEEE Open J. Antennas Propag.

View full text Add to dashboard Cite

In this paper, the impact of amplitude and phase imbalance on a proposed dual differential fed patch antenna is analyzed in the context of system effective reflection coefficient and axial ratio (AR). A single square patch with four ports is used as a solo radiating element and provides absolute symmetry at radiating. An in-depth analysis will be presented to understand the impact of external RF chain components on the performance of the proposed antenna. When fully differential excitations and perfect symmetry can be achieved, all six polarization states exhibit identical system effective reflection coefficients with close to ideal AR for CP. When phase imbalance and amplitude imbalance only exist in between the two differential pairs, the antenna system matching performance is found to be unchanged. In the presence of the feed network, circular polarization (CP) achieves a measured maximum AR of 0.49dB along the antenna pointing angle, while linear polarization (LP) has a measured maximum cross polarization of −30dB. This work monitors the beamwidth over which the AR can be kept below 1dB (BW-AR −1dB ). Based on the optimization of phase imbalance, a novel BW-AR −1dB enhancement technique is introduced. Compared to the case with better AR at the main beam location, an improvement of 14 • beamwidth is measured without significant degradation of AR. Isolation better than 40dB across an operating frequency of 9.27 − 9.4 GHz has been experimentally demonstrated for the proposed dual differential fed technique. The resulting antenna is compact and low profile which is an appealing candidate for phased array applications.INDEX TERMS Dual differential fed, 1dB AR beamwidth, patch antenna, polarization diversity, system effective reflection coefficient, high isolation.

show abstract

Section: Introductionmentioning

confidence: 83%

Section: Table 1 Amplitude and Phase Configurations Of The Dual Diffe...mentioning

confidence: 99%

Section: Analysis Of Dual Differential Fed Pairs With Amplitude Imbal...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of Amplitude and Phase Imbalance on Dual Differential Fed Patch Antenna With High Isolation

Zhou

Abdullah

Labossiere

et al. 2022

IEEE Open J. Antennas Propag.

View full text Add to dashboard Cite

show abstract

A Comparative Investigation of Conventional and Dual Differential-Fed 2×2 Phased Arrays

Cited by 1 publication

References 7 publications

Impact of Amplitude and Phase Imbalance on Dual Differential Fed Patch Antenna With High Isolation

Impact of Amplitude and Phase Imbalance on Dual Differential Fed Patch Antenna With High Isolation

Contact Info

Product

Resources

About