Lunar link budgets are asymmetric, and this antenna is specified accordingly. The uplink arrives from a large ground aperture with substantial transmit power, so a modest 17 dBic receive gain is sufficient; the downlink has to carry data across the same distance from the vehicle, so transmit gain is 27 dBic. Coverage follows the deep space network X-band allocation, with 10 MHz of bandwidth at each of receive and transmit and left-hand circular polarization per DSN convention. VSWR holds below 1.5:1 through an SMA female interface. Configuration types are flat panel or parabolic reflector. Qualification follows NASA GEVS Table 2.4-3 with 14.1 GRMS overall random vibration, minimum resonant frequency verification, and 0.25 g low-level sine sweeps before and after vibration. Thermal cycling is to mission requirements, typically -50 to -110 °C low and +50 to +90 °C high. Antenna pattern and S-parameter testing run from 1 to 40 GHz. LGA-X-001-LH is the matching low-gain antenna, delivered into the same programme and normally flown alongside to hold the link at unpointed attitudes.