Abstract
This letter presents a wideband high performance 45° linearly polarization 8x8-slot array antenna. The gap waveguide technology is utilized to realize the proposed antenna, so that the electromagnetic (EM) leakage among the metallic blocks can be cancelled. 2x4-slot sub-arrays are used to construct the array antenna. An additional cavity power divider layer is inserted between the layers of original cavity power dividers and radiation slots to balance the amplitude and phase distributions in wideband frequency band. This suppresses the grating lobes. Triangular blocks are loaded in the new cavity power divider layer to confine the EM field distribution, thereby improving cross polarization discrimination (XPD). For demonstration, a prototype antenna covering 5G mmW NR bands of 257, 258 and 261 is design, fabricated and measured. Measured results show that an impedance bandwidth of 23-30 GHz (|S11|<-10.5 dB) is achieved. Within this frequency band, the peak gain and antenna efficiency are more than 24.6 dBi and 76.3%. In addition, the sidelobe level (SLL) of lower than -25.8 dB and XPD of better than 30.2 dB are also obtained over the same frequency band.
Original language | English |
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Article number | 9423596 |
Pages (from-to) | 1259-1263 |
Journal | IEEE Antennas and Wireless Propagation Letters |
Volume | 20 |
Issue number | 7 |
Early online date | 4 May 2021 |
DOIs | |
Publication status | E-pub ahead of print - 4 May 2021 |
Bibliographical note
Publisher Copyright:IEEE
Keywords
- Antenna arrays
- Antennas
- Feeds
- Pins
- Power dividers
- Slot antennas
- Wideband
ASJC Scopus subject areas
- Electrical and Electronic Engineering