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A novel broadband three‐input four‐output (3 × 4) Butler matrix (BM) without crossover is presented for the wider band operation. The proposed 3 × 4 BM is composed of three 3 dB branch‐line directional couplers, one T‐splitter power divider, and two 90° phase shifters. Unlike the traditional BM, the proposed BM network has successfully eliminated the crossover connection for simplifying the network,...
This paper presents the design of dual-polarized ultra-wideband six-beam arrays for wireless communications (1.694–2.69 GHz). Based on the required specifications such as gain, the beam coverage, the cross-over point between beams, the side lobe level, and the grating lobe, three ultra-wideband dual-polarized six-beam arrays with varying antenna specifications have been designed, implemented, and...
This paper presents the design and implementation of dual band dual polarized multi-beam base station antennas. By utilizing the interleaved single band elements with asymmetrical non-uniform spacing arrangements, the proposed multi-beam antennas have the following dual band hybrid functions: normal L multiple beams at low band (0.698–0.96 GHz) and double 2L multiple beams at high band (1.71–2.36/1...
This paper presents the design of dual-polarized wideband multi-beam arrays for wireless communications (1.71–2.36 GHz). Based on the generalized Butler matrix, four multibeam dual-polarized arrays (i. e., 3, 5, 6, and 9 beams) with different antenna specifications have been implemented and tested.
This paper presents the design and implementation of dual band dual polarized hybrid base station antennas. By utilizing the integrated dual band elements, the proposed antennas have dual band hybrid functions: conventional 65degree beam at low band (698–894, or 790–960MHz) and bisector 33degree beams at high band (1.71–2.4GHz). After applying some mutual coupling and phase compensation techniques,...
This paper presents the design of a low profile wideband multibeam integrated dual polarization antenna array for C-band applications. Two three beam Butler beam-forming network (BFN) are implemented in a single layer and integrated with wideband aperture-coupled staked patch elements. By utilizing certain mutual coupling compensation techniques, the array performances, especially the return loss,...
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