It is suitable for a variety of applications. The antenna provides a wide angle of view in the azimuth and elevation planes and has been designed to provide repeatable, unit-to-unit phase tracking. The broadband balun and terminated spiral arms provide a broad operating bandwidth with low voltage standing wave ratio (VSWR) and axial ratio.
L3Harris can also provide the Q142-1 antenna preassembled into interferometer arrays with customer-specified spacing.
| Antenna gain (dBi) | .5 Frequency (GHz) | 1 Frequency (GHz) | 2 Frequency (GHz) |
|---|---|---|---|
| Peak | -5.0 | 3 | 5.1 |
| +/- 40° AZ @ 0° EL | -7.5 | -0.7 | 0.8 |
| +/- 10° EZ @ 0° AZ | -5.1 | 3.1 | 4.9 |
| Back lobe, maximum (-dBc) | 10 | 18 | 25 |
| Polarization | LHCP |
| Phase tracking: (element level) | +/- 6° |
| Phase tracking: (assembly level) | |
| Within +/- 40° AZ and +/- 10° EL | 10° peak-to-peak |
| Within any 100 MHz | 85% < 4.5° peak-to-peak, 100% < 4.9° peak-to-peak |
| Within 10° AZ | 2° peak-to-peak |
| Within 5° EL | 98% < 2° peak-to-peak, 100% < 3.0° peak-to-peak |
| Polarization | 2° peak-to-peak |
| Relative to gold standard | +/- 7.2° |
| VSWR, maximum | 2.5:1 for 100%, 2.0:1 for 60% |
| Amplitude tracking: (assembly-level) | |
| Within +/- 40° AZ and +/- 10° EL | 2 dB peak-to-peak |
| Within 10° AZ | 0.6 dB peak-to-peak |
| Within 10° AZ | 0.6 dB peak-to-peak |
| Within 5° EL | 0.6 dB peak-to-peak |
| Polarization | 0.6 dB peak-to-peak |
| Squint | 5° maximum |
| Power handling | +34 dBm up to 6 GHz, 28 dBm above 6 GHz |
| Connector | TNC |
| Weight | 1.60Kg (3.52 Pounds) |
| Finish | Chemical film per MIL-C-5541 (housing), white epoxy (radome) |
