Construction technique and performance of a 2 GHz rectangular corrugated horn

Abstract

A large rectangular horn antenna with a center frequency of 2.0 GHz, corrugated on the E-plane walls, made out of aluminum sheet, has been designed, constructed, and tested. A new technique has been developed to solder thin aluminum strips onto the back plane to form the corrugations. The radiation beam pattern shows half-power beamwidths of 12" and 14" in the H-and E-planes, respectively, and sidelobe response below -40 dB at angles greater than 50" from the horn axis. The measured return loss is greater than 20 dB (VSWR < 1.22) between 1.7 and 2.3 GHz; insertion loss is less than 0.15 dB.

A Suggested Arrangement of Grooves for Enhancing the Return Loss Performance Characteristics of Submillimeter-Wave Corrugated Horns

“…Next, whether or not the level of the performance thereof will improve by changing the measurements of the grooves is discussed. Then, the performance level of a corrugated horn equipped with a conventional smooth-wall (Matsunaga et al 2003;Clarricoats & Oliver 1984;Goldsmith 1998;Bersanelli et al 1992) as its mode-transforming section is compared with that of a corrugated horn equipped with a new mode-transforming section to determine how much the level of the return loss performance improves with the new mode-transforming section, and how much the cross-polarization deteriorates therewith.…”

“…The said conventional methods may be classified broadly into three categories: Methods involving (1) complex arrangements of grooves in the mode-transforming section (Clarricoats & Oliver 1984;Goldsmith 1998;Bersanelli et al 1992;James 1981;James & Thomas 1982; Thomas et al 1986); (2) grooves with symmetrical or asymmetrical ring loaded structures (James & Thomas 1982; Thomas et al 1986;Du et al 2003); and…”

Design of Symmetrical Beam Triple-Aperture Waveguide Antenna for Primary Feed of Reflector

“…On the contrary, for the typical rectangular corrugated horn antenna structure, the slots or grooves are located inside both vertical and horizontal planes around the rectangular aperture area. The rectangular corrugated horn [19] was experimented and it was reported that this antenna type failed to generate the symmetrical beam despite its relatively large size. In [20], the authors proposed a flared rectangular horn corrugated along the -plane flaring walls to achieve the symmetry in theand -planes; nevertheless, the antenna construction is very complicated and the antenna aperture is considerably large.…”