SIW Based Bandpass Filter Integrated H-Plane Horn Antenna for K Band Applications

Abstract

The paper presents a detailed over view of an H-plane Substrate Integrated Waveguide Horn antenna integrated with bandpass filter. The objective of this structure is to provide enhance gain and the low half power beamwidth for an antenna. The antenna shows dual band characteristics. A slot shaped in spinal form is cut at the top surface of the simple H-plane SIW horn antenna. The slot act as a bandpass filter with a range of 21.95GHz to 25.73GHz. The 10dB bandwidth of the filter is 3.78GHz. The filter proposed is designed in a spinal shape with six side ribs. The antenna has a gain of 4.86dB at 21.8GHz and 5.74dB at 23.68Hz. Integrating a filter with SIW horn antenna is key technology for reducing the lumped circuit element. Hence the proposed structure is miniaturized version of the front element of communication system i.e. antenna and the signal processing elements like filters. These types of antenna found its applications in Radar and satellite communication.