Title :
Fundamental challenges for wideband antenna elements in focal-plane arrays
Author :
Dubok, A. ; Al-Rawi, A. ; Herben, M.H.A.J. ; Smolders, A.B.
Author_Institution :
Dept. of Electr. Eng., Eindhoven Univ. of Technol., Eindhoven, Netherlands
Abstract :
This paper discusses the main design challenges of wideband antenna elements which can be used in focal-plane arrays. A novel electrically-small wideband antenna is presented. It is based on a bow-tie antenna. The proposed antenna shows excellent input matching properties over a frequency band of more than one octave and nearly reaches the theoretical Chu-Harrington limit. It is shown that the centre element of a five-element feed array, operating at a centre frequency of 30 GHz, realizes an input matching bandwidth of 24.4 GHz.
Keywords :
antenna feeds; bow-tie antennas; broadband antennas; focal planes; microwave antenna arrays; Chu-Harrington limit; bandwidth 24.4 GHz; bow-tie antenna; electrically-small wideband antenna; five-element feed array; focal-plane array; frequency 30 GHz; Antenna arrays; Antenna theory; Broadband antennas; Impedance matching; Wideband;
Conference_Titel :
Antennas and Propagation (EuCAP), 2015 9th European Conference on
Conference_Location :
Lisbon
