Design and development of an 8 to 12 GHz circularly polarized two element horn antenna array with high isolation

Toit, J. B. du; Baker, D. E.; Booysen, A.J.

doi:10.1109/apwc.2012.6324981

Cited by 1 publication

(1 citation statement)

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“…Horn antenna is an attractive choice for circularly polarized element [2][3][4]. A typical circularly polarized horn antenna consists of three major components: a wave launcher, a polarizer and a beam shaper [5].…”

Section: Introductionmentioning

confidence: 99%

Horn-Based Circular Polarized Antenna Array With a Compact Feeding for Ka-Band Monopulse Antenna

Yongli¹,

Wang

Da-cheng³

et al. 2013

PIER

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Abstract-A pyramidal horn monopulse array is proposed for working at Ka-band with circular polarization (CP) characteristic. The array is composed of 28 elements with a 28-way waveguide power divider network. The element has a pyramidal horn with a rectangular waveguide, which is placed downside the horn. There is a 45 • inclined slot cut in the wide wall of the rectangular waveguide. The inclined slot can convert the excitation into two orthogonal modes with equal amplitude, and 90 • out of phase is produced due to different propagation constants of the two modes in the pyramidal horn. Therefore, the antenna can achieve CP by using a compact structure without polarizer. This paper also provides procedure of the compact power divider network for synthesizing monopulse pattern. This monopulse array has excellent performance: The simulated and measured reflection coefficients of the sum port and difference port of the array are below −15 dB, the side lobe level of array less than −27 dB, and axial ratio < 3 dB in the mainlobe beamwidth. The simulated and measured results are in good agreement.

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