Horizontally Polarized UHF Panel Antenna for 470-700 MHz
Model: PA41-UHP-HP - 2kW Broad Band UHF Panel Antenna
The PA41-UHP-HP broad band UHF panel antenna is a horizontally polarized panel antenna covering the UHF spectrum from 470-700 MHz featuring a 7-16 DIN female input connector. Since the antenna is broad band, it is able to accomodate multiple input channels at the same time, thus minimizing the amount of tower real estate required. The PA41-UHP-HP is a 4 dipole panel antenna with the dipoles being composed of structural aluminum that are attached to a rear support spine for rigidity. The rear reflector panel is galvanized sheet metal and the radome is composed of a UV stable polymer that can withstand impact from falling ice and severe installation environments.
The antenna can be tuned for a VSWR of less than 1.10:1 across multiple channels in the UHF band, as the panel antenna by nature is a very broad band antenna design. The addition of multiple antennas stacked both vertically (one on top of another) and horizontally (multiple panels oriented around the tower) increase coverage and gain of the array.
UHF frequencies have shorter wavelengths than VHF frequencies which translate into smaller antenna overall size for a given gain. However, the smaller wavelength at UHF frequencies can cause pattern distortions in multiple antenna arrays if the UHF antennas are not properly mounted in relation to each other. Tower face widths being much wider than one wavelength at UHF often cause problems for side-mounted arrays wanting omni-directional coverage because of the larger mounting radius that larger face-width towers create. If the spacial distance between UHF panel antennas is too wide, the coverage pattern experiences phase distortions in the area between adjacent panels, with the severity of phase cancellation dependant on the distance between antennas. For top-mounted or side-mounted installations we offer integrated mounting hardware to allow multiple panels to be mounted in a static array formation that removes the possibility of installation error and, consequently, coverage pattern distortion.