A 2-D Beam Scanning Array Antenna Fed by a Compact 16-Way 2-D Beamforming Network in Broadside Coupled Stripline

Temga, Jean; FURUICHI, Tomoyuki; Shiba, T.; Suematsu, Noriharu

doi:10.1587/transcom.2022fgp0003

Cited by 1 publication

(2 citation statements)

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“…In this study, a 2-D multibeam array antenna is realized using the broadside coupled stripline (BCS) multilayer technique. References [ 20 , 21 , 22 , 23 , 24 , 25 , 26 ] contain multiple PCB designs of compact 1-D and 2-D BFNs employing a BCS that were proven by the reference authors. The use of the crossover and 45° phase shifter is required in the typical 1-D BFN [ 22 ], which leads to geometric complexity and performance deterioration.…”

Section: Introductionmentioning

confidence: 99%

“…Two 3 dB/90° cascaded broadside couplers can be used to perform the crossover; however, doing so will result in higher losses and a larger overall system. Without using a crossover, the BFN in [ 23 ] was revised in [ 23 , 25 , 26 ]. It appears that the bandwidth is considered to be limited by the phase shifter, making design more difficult.…”

Section: Introductionmentioning

confidence: 99%

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A Compact Broadside Coupled Stripline 2-D Beamforming Network and Its Application to a 2-D Beam Scanning Array Antenna Using Panasonic Megtron 6 Substrate

Temga,

Shiba,

Suematsu

2024

Sensors

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This article presents a 4-way 2-D butler matrix (BM)-based beamforming network (BFN) using a multilayer substrate broadside coupled stripline (BCS). To achieve the characteristics of a compact, wide-bandwidth, high-gain phased array, a BCS coupler is implemented using the Megtron 6 substrate. The compact 2-D BFN is formed by combining planarly two horizontal BCS couplers and two vertical BCS couplers. The BFN is proposed without a crossover and without a phase shifter, generating phase responses of ±90° in the x- and y-directions, respectively. The proposed BFN exhibits a wide operating band of 66.7% (3–7 GHz) and a compact physical area of just 0.25 λ0 × 0.25 λ0 × 0.04 λ0. The planar 2-D BFN is easily integrated with the patch antenna radiation elements to construct a 2-D multibeam array antenna that generates four fixed beams, one in each quadrant, at an elevation angle of 30° from the broadside to the array axis when the element separation is 0.6 λ0. The physical area of the 2-D multibeam array antenna is just 0.8 λ0 × 0.8 λ0 × 0.04 λ0. The prototypes of the BCS coupler, the 2-D BFN, and the 2-D multibeam array antenna were fabricated and measured. The measured and simulated results were in good agreement. A gain of 9.1 to 9.9 dBi was measured.

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