90° Broadband asymmetrical open-short-stub phase shifter with inductance compensation

Wei, Muh‐Dey; Gjurovski, Peco; Negra, Renato

doi:10.1109/eumc.2016.7824509

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…5a) can create stable phase shift (i.e. unit ratio of group delays) as compared with a 50-Ω microstrip line in the frequency band of more than 20%, as it has been shown in [32]. Series connection of two such phase shifters gives us the ratio of group delays equal to 2.…”

Section: The Design Of the Wideband Phase Shiftermentioning

confidence: 81%

“…From this figure, it can be seen that the group delay of the crossover is more than twice of that of the microstrip line. Therefore, well-known wideband planar designs of Shiffman phase shifter [28], Lange coupler based phase shifters [29,30], or T-shaped open stub [31] and open-short stub phase shifters [32] cannot be used in the proposed Butler matrix design as they provide unit group delay ratio, whereas this particular crossover design requires 2.5 group delay ratio. Therefore, a new design is required to achieve the required group delay ratio and subsequently a stable phase shift over the entire BW.…”

Section: The Design Of the Wideband Phase Shiftermentioning

confidence: 99%

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A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications

Klionovski

Sharawi

Shamim

2019

IEEE Trans. Antennas Propagat.

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Increasing data transfer rates for future millimeter-wave communications require high capacity radio channels and user-centric communication network environments. Therefore, special requirements, such as wide-angle beam steering, wide operational frequency bandwidth and simultaneous operation with orthogonal polarizations are essential for telecommunication antennas. In this paper, we present a compact patch antenna array with a Butler matrix feed network for the frequency band of 26-31.4 GHz. The 16-element planar array has been designed to operate with two linear orthogonal polarizations and provide ±42º beam switching. To ensure wideband operation, a novel combination of planar couplers, crossovers and phase shifters is designed to form the Butler matrix. A new phase shifter topology is used which is based on a combination of open-short stubs and Shiffman phase shifter. The design is fabricated on a low-cost multi-layer board with a size of 120x70x1.62 mm 3. The size of the feeding network, which is implemented on a single board, is 76x23x0.1 mm 3. Experimental measurements of return loss, mutual coupling and radiation patterns confirm simulated results.

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Section: The Design Of the Wideband Phase Shiftermentioning

confidence: 81%

Section: The Design Of the Wideband Phase Shiftermentioning

confidence: 99%

A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications

Klionovski

Sharawi

Shamim

2019

IEEE Trans. Antennas Propagat.

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Wideband circularly polarized high accuracy survey active antenna for global navigation satellite systems applications

Wei,

Liao,

Xue

et al. 2024

Micro & Optical Tech Letters

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This letter presents a new circularly polarized (CP) active antenna for global navigation satellite systems (GNSS) operating in the L1‐band (1.164–1.28 GHz) and L2‐band (1.525–1.615 GHz). The active antenna consists of a passive antenna and a two‐channel low‐noise amplifier (LNA) circuit. To achieve wideband coverage of the L1/L2 bands while maintaining a low profile, a new electroplating process is utilized in fabricating the passive antenna. Additionally, to realize CP performance, the passive antenna is sequentially fed by four ports with a wideband feeding network. To minimize phase variations, a 90° phase shifter loaded with open‐short‐stub is integrated into the feeding network. Furthermore, to improve noise immunity, out‐of‐band rejection, and amplify GNSS signals, the LNA circuit cascades two‐stage dielectric bandpass filters and three‐stage LNAs. Consequently, the circuit features a low noise figure of below 1.65 dB, a maximum out‐of‐band rejection level of 60 dB, and a stable active gain of 30 dB. The performance of the active antenna is evaluated in an outdoor open field using a GNSS receiver.

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Implementation of a Four-Way Amplitude Modulated Mixerless Transmitter

Gjurovski

Wei

Negra

2019

2019 49th European Microwave Conference (EuMC)

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90° Broadband asymmetrical open-short-stub phase shifter with inductance compensation

Cited by 3 publications

References 8 publications

A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications

A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications

Wideband circularly polarized high accuracy survey active antenna for global navigation satellite systems applications

Implementation of a Four-Way Amplitude Modulated Mixerless Transmitter

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