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| Content Provider | Directory of Open Access Journals (DOAJ) |
|---|---|
| Author | Nafati Aboserwal Jorge L. Salazar-Cerreno Zeeshan Qamar |
| Abstract | A design of an X-band dual-polarization slotted waveguide antenna (SWGA) array for high polarization performance over 200 MHz bandwidth and wide scan in the azimuth plane, ideal for high-power dual-polarized radar system, is presented. The proposed design uses a compact array unit cell where the overall dimensions are reduced to 50% in comparison with that of the dual-polarization slotted waveguide array antenna using the conventional rectangular waveguides. The new design overcomes the fundamental limitation of zero electronically scanning, due to the large element spacing $(1.2λ_{o}$), when conventional waveguides are used. Reducing the element spacing to $0.6λ_{o}$ (in the azimuth plane), based on a partial H-plane waveguide, enables a 1D e-scanning range up to 84°(±42°) in the azimuth plane perpendicular to the waveguide axis. An active sub-array panel of 8×8 elements, excited with 8 high-power transmit and receive modules, is proposed. This active sub-array can be scaled to obtain a large array without any constraints in size and power. The proposed design uses longitudinal shunt slots on the partial H-plane waveguide for V-polarization antenna and non-inclined edge wall slots on the conventional waveguide for H-polarization antenna. The proposed design offers stable impedance, gain, cross-polarization isolation and excellent copolar pattern mismatch over the whole frequency band of interest. Having a cross-polarization isolation better than -60 dB and co-polar pattern mismatch around ± 0.12 dB across the scanning range, make this array unit cell (8 × 8 elements) a perfect candidate for high power e-scanned dual-polarized phased array radar for weather observations. |
| e-ISSN | 21693536 |
| DOI | 10.1109/ACCESS.2020.3038485 |
| Journal | IEEE Access |
| Volume Number | 8 |
| Language | English |
| Publisher | IEEE |
| Publisher Date | 2020-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Electrical Engineering. Electronics. Nuclear Engineering Array Compact Antenna Dual-polarization Partial H-plane Structure Slotted Waveguide Antenna Wide Scan |
| Content Type | Text |
| Resource Type | Article |
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