研究目的
Investigating the design and performance of a novel circularly polarized waveguide slot array antenna for satellite communications.
研究成果
A 2D waveguide array antenna of T-shaped slots is demonstrated that is capable of broadside radiation of circular polarization. The proposed antenna is verified with the experimental results of an 8×6 RHCP T-slot waveguide antenna array at 29.5 GHz. A gain of 21.9 dBi, -10 dB impedance bandwidth of 1 GHz, and a minimum axial ratio of 1.3 dB are measured, which are in excellent agreement with the simulated results.
研究不足
The axial ratio degrades when the slots are arrayed due to the reflected waves within the unit cell that contribute to the opposite polarization. Further investigation in enhancing the isolation between unit cells for improvement of AR remains as future work.
1：Experimental Design and Method Selection:
The antenna design features a unique feeding network and a unit cell consisting of a pair of simple T-shaped waveguide slots. The design aims to eliminate grating lobes and simplify the fabrication process.
2：Sample Selection and Data Sources:
A prototype 6×8 array antenna is designed at
3：5 GHz. List of Experimental Equipment and Materials:
The antenna is fabricated by dip brazing two precision-CNC-machined aluminum blocks of waveguide halves.
4：Experimental Procedures and Operational Workflow:
The radiation slots are milled on a separate plate of 1 mm thickness, which is dip brazed on the top of the two waveguide half blocks to form the complete slot array antenna system.
5：Data Analysis Methods:
The antenna is measured using a near-field scanner with an open-ended WR-28 probe in a 2.4 × 2.4 m2 chamber. The radiated V and H components are measured on two consecutive passes with an Agilent PNA E8362B network analyzer.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
