High VHF Panel Antenna for 174-230 MHz
Model: PA31-SDP - Straight Dipole VHF Panel Antenna
The PA31-SDP panel antenna is a horizontally or vertically polarized panel antenna covering the high VHF band from 174-216 MHz. The antenna is broad band from 174-216 MHz, thus it is able to accomodate multiple high VHF input channels at the same time. The PA31-SDP is composed of stainless steel and/or hot-dipped galvanized steel and is installed side-mounted to a tower. The front radiating elements are shipped disassembled from the rear panel to reduce shipping volume, thus minimal on-site assembly is required.
The antenna can be tuned for a VSWR of less than 1.10:1 across multiple channels in the high VHF 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.
The rear reflector on the PA31-SDP sheilds the active dipoles from any influence on impedance that adjacent metal behind the panel creates, such as the mounting structure or tower. The reflector panel, in effect, isolates any metal behind it from the active dipoles, thus greatly reducing the passive impedance effect that the mounting structure has on the active dipoles and the antenna array in general. In addition to providing shielding from the mounting structure, the panel reflector provides gain and directivity of the forward lobe, giving the broadcaster greater control and efficiency by broadcasting the signal where it is most needed and away from where it is not through the flexibility that panel antennas create by being modular toward the finalized coverage pattern.