Ku-band Radome Integrated Circular Slotted Waveguide Antenna with Inclined Beam

The antenna is similar to another Ku-band antenna developed in Microwave Electonics Department. It is high-efficient, compact-size slotted waveguide antenna with circular aperture designed for operation in Ku-band. The beam of this antenna is essentially inclined with respect to the antenna surface normal what has enabled to reduce dramatically the antenna radar visibility from the target direction. The antenna is also equipped with a low-profile waveguide comparator and provides monopulse operation in the azimuth-plane.

Ku-band Circular Slotted Waveguide Antenna Fig. 1. Ku-band Circular Slotted Waveguide Antenna

The antenna is equipped with radome integrated into the antenna structure according to the techonolgy developed in Microwave Electronics Department. Radiating slots are cut in the foil of a foiled dielectric material, which services as a waveguide wall. The appearence of the radome panel is shown in Fig.2. The radome is significantly improves environmental protection of the antenna. It is compact size and low-weight.

Radome panelFig. 2. Radome panel appearence

Antenna Characteristics

Operating bandwidth, GHz 0.5 (in Ku-band)
Beam type pencil
3dB beam width, deg 5
Beam inclination (in E-plane), deg 15
Side lobes level, dB <-22
Null depth of difference pattern, dB <-30
Gain, dBi >31
Polarization Linear/Vertical
VSWR <1.2
Diameter, mm 265
Thickness, mm 10
Weight, kg 0.9



1. S.S. Sekretarov and D.M. Vavriv: Radome integrated slotted waveguide antennas, XI International Conference on Antenna Theory and Techniques (ICATT 2017), Kyiv, Ukraine, May 24-27, pp.46-49 (2017)