Abstract
In this letter, a compact wideband multibeam pillbox antenna is proposed based on differential feeding technology. The proposed design focus on extending the operating frequency bandwidth of the leaky-wave antenna (LWA) array with a fixed broadside beam, since the bandwidths of the existing pillbox antennas are always limited by the radiators, especially considering the standard printed circuit board technology with limited layers. To overcome this limitation, a differentially fed LWA is used as the radiator. The two subarrays of the LWAs are excited with oppositely propagating waves through a coupled slot, generating two oppositely directed beams whose combination can produce a fixed broadside beam over a wide operating bandwidth. A 14-element LWA array is fabricated with a pillbox beamforming network (BFN) to verify its design theory. The simple feeding structure of the LWA makes the LWA array can be stacked on the top of the pillbox BFN, achieving antenna miniaturization. The measured results show that the proposed antenna can achieve the −10 dB impedance matched bandwidth from 14.0 to 16.0 GHz and seven beams with ±34° beam scanning range. The broadside beam has a gain variation range of 16.8–20.2 dB over the operating band.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
