Abstract
This letter presents a continuous transverse stub (CTS) array antenna with high aperture efficiency, low sidelobes, and cross-polarization characteristics over an E -band. The antenna consists of a full-corporate-feed 32-slot CTS array and a 45° linear polarizer. A multiple-aperture excited parallel-plate waveguide structure works as a linear source generator to generate the quasi-TEM wave with a uniform amplitude distribution over the whole operating band from 71 to 86 GHz. The 45° linear polarizer contains two layers of slots, shifting the linear polarization from the principal E -plane ( φ = 90°) to the intended E -plane ( φ = 135°). The array antenna achieves the low cross polarization and sidelobe level (SLL) while maintaining high aperture efficiency. Measurement results show that the antenna has an aperture efficiency of over 74% with the peak gains of better than 37.9 dBi over the whole E -band, while the far-field SLLs in the intended E - and H -planes approach the ETSI class IV envelope standard.
Original language | English |
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Article number | 8827274 |
Pages (from-to) | 2189-2193 |
Number of pages | 5 |
Journal | IEEE Antennas and Wireless Propagation Letters |
Volume | 18 |
Issue number | 10 |
Early online date | 9 Sept 2019 |
DOIs | |
Publication status | Published - 4 Oct 2019 |
Keywords
- 45° linear polarizer
- Antenna arrays
- Aperture antennas
- Continuous transverse stub (CTS) array
- Couplings
- Feeds
- Gain
- Power dividers
- low sidelobe levels (SLLs)