Dual-port operation allows both hands of circular polarization to be measured without a mechanical swap and re-alignment mid-campaign, which keeps a characterisation dataset continuous. Thirteen GHz of continuous coverage spans K and Ka band in one part, serving both the 17 to 20 GHz downlink range and the 27 to 30 GHz uplink range without changing hardware. Gain is 15 dBic minimum and 18 dBic maximum across that span, with directivity of 10 dB and two 2.92 mm female connectors. The horn is machined for durability in daily laboratory and range use, rated -40 to +85 °C, at 91 x 46 x 46 mm (3.59 x 1.8 x 1.8 in) and 100 g. HA-KKA-002 is the 20 dBic configuration for range-limited measurements, and HA-KKA-003 is the compact waveguide probe for close-range work. Custom gain, aperture and interface configurations are available, including designs developed around an existing antenna geometry.