A new sum-channel radiating element for a patch-monopole monopulse feedMiklavčič, Peter (Avtor) Batagelj, Boštjan (Avtor) wireless communicationsmonopulse antennamultimode antennaprime-focus feedcircularly-polarized patchThis article describes a new design for the sum-channel, circularly-polarized, radiating patch element of a multimode patch-monopole monopulse feed. Such feeds are suitable for the prime-focus illumination of a deep symmetric reflector. A relatively simple and compact feed design allows for a compact single-mirror antenna with monopulse tracking. The feed is about a wavelength in diameter, also making it suitable for illuminating smaller antennas, for example, in LEO-satellite ground (client) stations. The design applies a slotted circular patch as a circularly-polarized sum-channel element. The design variables are optimized mainly for the sum-channel aperture illumination efficiency in an S-band satellite ground station. After a few cut-and-try iterations, the final feed prototype was produced and measured. In addition to an additional degree of freedom in the geometry and potentially easier fabrication, the new sum-channel radiating-element shape allows for a slightly better monopulse channel isolation, and a higher radiation-pattern symmetry compared to the previous design.20242024-08-12 13:44:34Članek v reviji160052UDK: 621.39ISSN pri članku: 2079-9292DOI: 10.3390/electronics13163187COBISS_ID: 204164355sl