Highly efficient front end direct conversion receiver for 28-GHz wireless access point

Mohammad Akbari*, Mohammadmahdi Farahani, Mansoor Dashti Ardakani, Ali Lalbakhsh, Saman Zarbakhsh, Serioja Ovidiu Tatu, Abdel-Razik Sebak, Omar M. Ramahi, Tayeb A. Denidni

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
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The manuscript presents the design and characterization of a wideband front-end receiver, based on hollow waveguide technology, for the wireless access point (WAP) applications. The Ka-band receiver is comprised of a low-loss beam-switching antenna network (BSAN) with two-dimensional (2D) scanning property. For demodulation, the receiver uses an efficient six-port network (SPN) that is composed of four 90° hybrid couplers and a 90° phase shifter. To suppress the phase imbalance on the entire band of interest, 27 GHz to 33 GHz, a frequency-independent phase shifter with a minimum phase error is suggested. The SPN receiver is integrated with antenna-in-package in waveguide technology to decrease the insertion losses and noise levels at the first stages. To determine the SPN phase errors, a theoretical and experimental analysis of real-time wireless data transmission utilizing phase-shift keying (PSK) and quadrature amplitude modulated (QAM) signal is conducted. Besides, channel capacity along with beamformer influence on channel performance improvement are determined.

Original languageEnglish
Pages (from-to)88879-88893
Number of pages15
JournalIEEE Access
Publication statusPublished - 2021

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