Abstract
A Ka-band waveguide continuous transverse stub (CTS) antenna array with full-corporatefeed network is presented in this paper. Multiple section stepped-impedance transformers are used for wideband impedance matching of the radiation slots. The required high-quality quasi-TEM wave excitation is generated by a wideband plane-wave generator (WPWG). Compared with the conventional pillbox structure, the WPWG produces a quasi-TEM wave with more uniform amplitude distribution. By using the combination of these design features, significant increases both in bandwidth and antenna aperture efficiency are achieved. For demonstration, a prototype is designed, fabricated and measured. Excellent agreement is achieved between simulations and measurements. The antenna is matched over the entire Kaband of 26 to 40 GHz. A high antenna aperture efficiency of over 75% and a low cross-polarization of less than -46 dB is achieved over the entire bandwidth. The demonstrated features of wideband, high aperture efficiency and low cross-polarization have great potentials for millimeter-wave applications.
Original language | English |
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Pages (from-to) | 76673-76681 |
Number of pages | 9 |
Journal | IEEE Access |
Volume | 6 |
Early online date | 27 Nov 2018 |
DOIs | |
Publication status | Published - 28 Nov 2018 |
Keywords
- Antenna arrays
- Power dividers
- Wideband
- Feeds
- Apertures
- Broadband antennas
- Wideband antenna array
- continuous transverse stub antenna
- aperture efficiency
- wideband plane wave generator
- full-corporate-feed network