Highly Efficient 30 GHz 2x2 Beamformer Based on Rectangular Air-Filled Coaxial Line

Akbari, Mohammad; Farahani, Mohammad Reza; Zarbakhsh, Saman; Ardakani, Mansoor Dashti; Sebak, Abdel-Razik; Denidni, Tayeb A.; Ramahi, Omar M.

doi:10.1109/tap.2020.2980252

Cited by 21 publications

(15 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The BSAN is comprised of four 3-dB wideband and efficient 90° directional couplers. The BSAN employed here does not use the phase shifter and crossover coupling [8]. The radiating part of the BSAN employs 2 × 2 open-ended waveguide antennas to achieve a 360° lateral scan in 90° steps.…”

Section: Beam-switching Antenna Network (Bsan)mentioning

confidence: 99%

“…However, because of the complex configuration and redundant signal processing, implementing the first group, adaptive arrays, would be costly. Alternatively, because of not using digital controllers, BSAN is realized as an inexpensive approach at the cost of a larger size [8]. The BSANs are developed with diverse configurations, such as the Butler matrix (BM) [8], Blass matrices [9], Rotman lenses [10], and the Nolen matrix [11].…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, because of not using digital controllers, BSAN is realized as an inexpensive approach at the cost of a larger size [8]. The BSANs are developed with diverse configurations, such as the Butler matrix (BM) [8], Blass matrices [9], Rotman lenses [10], and the Nolen matrix [11]. The BM in comparison with others is considered as an uncomplicated and low-priced structure that can be embedded in a small number of components.…”

Section: Introductionmentioning

confidence: 99%

“…The BM in comparison with others is considered as an uncomplicated and low-priced structure that can be embedded in a small number of components. In the conventional BM, the employment of the 45° phase shifter and crossover coupler are mandatory, which leads to geometrical complexity and performance degradation [8], [12]. Point out that the crossover is usually implemented utilizing two 3-dB cascaded hybrid couplers, which raise the losses and increase the size considerably [12], [13].…”

Section: Introductionmentioning

confidence: 99%

“…Point out that the crossover is usually implemented utilizing two 3-dB cascaded hybrid couplers, which raise the losses and increase the size considerably [12], [13]. Thus, in terms of complexity, size, bandwidth, losses, and phase errors, the implementation of a BM topology without the crossover coupler and phase shifter is realized as a substantial benefit [8]. Regarding some major factors such as reducing circuit complexity and enabling a higher level of circuit integration than conventional heterodyne receivers, direct-conversion (zero-IF) receivers play a substantial role in the wireless communications [14].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Highly Efficient Front End Direct Conversion Receiver for 28-GHz Wireless Access Point

et al. 2021

Self Cite

View full text Add to dashboard Cite

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 90º hybrid couplers and a 90º 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.INDEX TERMS Antenna array, beam-switching antenna network (BSAN), direct modulation, homodyne receiver, phase-shift keying (PSK), six port network (SPN), wireless access point (WAP).

show abstract

Section: Beam-switching Antenna Network (Bsan)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Highly Efficient Front End Direct Conversion Receiver for 28-GHz Wireless Access Point

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

Stripline forward‐wave directional coupler based on double multi‐via mushroom and short‐circuited branch line

Shi

Shen

et al. 2021

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

A stripline forward‐wave directional coupler is proposed using periodical double multi‐via mushroom structures and short‐circuited branch lines in this paper. By adding the short‐circuited branch lines to the coupled lines and the patch of the upper or lower mushroom structure, the operating bandwidth is enhanced for the unit cell design. The even/odd mode phase difference of one unit cell is located within 20 ~ 30° from 6.1 to 6.7 GHz with an acceptable even/odd mode Bloch impedance mismatching. Finally, a prototype is fabricated by multi‐layer printed circuit broad technology and measured. The agreement is achieved between the simulated and measured results.

show abstract

V-Band Six-Port Interferometer Receiver: High Data-Rate Wireless Applications, BER and EVM Analysis, and CFO Compensation

Ardakani

Tatu

2021

IEEE Access

Self Cite

View full text Add to dashboard Cite

The realization and analysis of an implemented V-band six-port demodulator, operating over 60 GHz band, are presented in this paper. The performance of the design in real-time high-data-rate wireless data transmission is strongly proved using different modulated signals. The valid high data-rate demodulation results achieved over a 7 GHz band (from 57 to 64 GHz), provide a confirmation that this six-port interferometer receiver is an attractive proposition for homodyne or heterodyne transceivers designed for high-speed short-range wireless communication systems, such as future wireless small cell backhaul for 5G. The performance of the proposed direct conversion receiver is characterized in terms of the bit error rate (BER) and error vector magnitude (EVM) for various M-PSK/M-QAM demodulated signals. To verify the resulting data, the relation between the error vector magnitude and the bit error rate is also analyzed. Theoretical results are matched to measured values and validate that the EVM and BER are appropriate metrics for mm-wave channels limited by additive white Gaussian noise. In the last section, the proposed six-port interferometer is introduced for precise estimation of carrier frequency offset (CFO) and Doppler shift in V-band wireless systems. The final results, which include various modulation configurations at mega or Giga symbol rates generated by the implemented transmitter, are supported by laboratory measurements.INDEX TERMS Bit error rate, carrier frequency offset, direct conversion receiver, fifth-generation (5G) systems, error vector magnitude, multiport interferometer, six-port junction.

show abstract

Highly Efficient 30 GHz 2x2 Beamformer Based on Rectangular Air-Filled Coaxial Line

Cited by 21 publications

References 42 publications

Highly Efficient Front End Direct Conversion Receiver for 28-GHz Wireless Access Point

Highly Efficient Front End Direct Conversion Receiver for 28-GHz Wireless Access Point

Stripline forward‐wave directional coupler based on double multi‐via mushroom and short‐circuited branch line

V-Band Six-Port Interferometer Receiver: High Data-Rate Wireless Applications, BER and EVM Analysis, and CFO Compensation

Contact Info

Product

Resources

About