A Fully Symmetrical Uni-Planar Microstrip Line Comparator Network for Monopulse Antenna

Zhang, Hanxiang; Ren, Han; Gu, Yixin; Arigong, Bayaner

doi:10.1109/lmwt.2023.3235580

Cited by 8 publications

(1 citation statement)

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“…This modification resulted in an expanded 30 dB null bandwidth, reaching 20% for one of the DELTA channels, while the bandwidth for other channels remained unchanged. A symmetrical uni-planar monopulse comparator by cascading two identical 90°couplers with two phase delay lines, where the total phase delay of two lines is 180°is also presented in [14] achieving 20 dB null depth with 8% bandwidth. In our effort to further enhance the 30 dB null bandwidth, a new architecture for monopulse comparators was designed.…”

Section: Introductionmentioning

confidence: 99%

A Compact Monopulse Antenna Array With Suppressed Mutual Coupling Using Broadband Schiffman Phase Shifters

Alamdar,

Mohammadpour-Aghdam,

Khalili

2024

IEEE Access

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This study presents the design, fabrication, and measurement of a compact microstrip monopulse antenna array for surveillance applications. The design process and limitations of the planar antenna structure are discussed, including the stacking of two radiating elements as a parasitic loaded patch antenna to increase bandwidth and suppress mutual coupling. A distributed feeding network for 8×16 elements with an integrated monopulse comparator, was designed and optimized, with the comparator placed in a separate layer to prevent spurious radiation. The operating frequency is 15.5-18 GHz, and the antenna exhibited a bandwidth of approximately 15%. The measurement results for the fabricated antenna array align with the simulations and design goals, with sidelobe levels of the beam better than 17 dB in both the E-and H-plane, and a null depth in the Delta pattern of less than -30 dB. The peak gain at the operating frequency is 22.3 dB and the total efficiency of the antenna array is approximately 55%.

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Section: Introductionmentioning

confidence: 99%