Parabolic Antenna JRMD-900–10/11 for 10–11 GHz Microwave Links

The Jirous JRMD-900-10/11 is a parabolic antenna for microwave links in the 10 and 11 GHz bands, with an operating frequency range of 10.0–12.0 GHz. Its deep reflector dish design is paired with gain of 36.5 ± 1 dBi at the lower end of the range and 37.0 ± 1 dBi at the higher end, giving the antenna a clearly defined role in directional point-to-point radio links. A 2.3° beamwidth at −3 dB concentrates the radiation pattern, while the front-to-back ratio of at least 57 dB helps describe how strongly the antenna favors its intended direction over the rear side. The reflector geometry and these RF characteristics are therefore central to the antenna’s directional link function.

The antenna supports linear polarization in either vertical or horizontal orientation, allowing the installation to be matched to the required polarization of the microwave link. Its RF interface is a circular waveguide with a 19 mm diameter, and the specified return loss is at least 16 dB across 10.3–11.7 GHz. Compliance covers US FCC Part 101A for 10.550–10.680 GHz, US FCC Part 101B for 10.7–11.7 GHz, and Class 2 ETSI EN 302-217-4-2. Together, these electrical characteristics define a focused microwave antenna intended for regulated 10 and 11 GHz deployments, with the key RF properties concentrated around directional link performance rather than broad-area coverage.

Installation is built around the supplied holder, which can be mounted on the mast before the antenna itself is attached. Once the holder is in position, the antenna with its microwave unit can be hung into the assembly and secured with two screws. This sequence separates the mast-mounting stage from the final antenna placement, simplifying the physical installation process described for the system. The holder is suitable for mast diameters from 40 to 120 mm and supports mounting on either the right or left side, giving installers flexibility in how the antenna is positioned on the supporting structure.

Precise alignment is supported in both elevation and azimuth, with fine adjustment of ±20°. This is particularly relevant to a directional antenna with a narrow 2.3° beamwidth, where careful positioning is an important part of establishing the intended link direction. The antenna is specified for an operating wind load of 140 km/h and a survival wind load of 210 km/h, while the design is described as offering extreme wind stability. In locations where strong winds are expected, a mast diameter of at least 70 mm is recommended. The deep aluminium-alloy reflector, massive holder, and UV-stable ABS radome form the physical assembly around these mounting and outdoor-use requirements, combining precise adjustment with a structure designed for exposed installations.