The aperture provides directional coverage at the lower very high frequency bands with high gain performance by using an efficient matching network. The upper frequency aperture is comprised of stacked dipole elements located near the top of the assembly avoiding potential blockage by the vehicle. The Q173 uses a proven assembly based on the Q71 JTIDS antenna, which has undergone full environmental testing. The design also incorporates a unique spring damper assembly that prevents the antenna from oscillating after an impact.
Q173 Antenna Specifications
| Frequency range | 800 - 2,500 MHz |
| VSWR | 3.0:1 |
| Gain | +8 to +13 dBi peak typical |
| Pattern | |
| Azimuth | Forward directional |
| Elevation | Figure eight |
| Power handling | 140 W |
| Connector | SMA Female |
| Weight | 0.25 lbs max |
| Finish | CARC color green or desert sand |
| Operating temperature | -40° C to +55° C |
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