A 60-foot structure was added to the top of the tower, allowing KWHY to operate both antennas for a brief period for a clean break to VHF.
NextGen TV-ready antenna reduces footprint and expands configuration options for low-band VHF transmission.
Dielectric breaks through the typical size and weight constraints of low-band VHF antennas with the debut of its new DCR-Q. The DCR-Q Series reduces the space normally required on a tower to support a traditional, low-frequency panel or super turnstile channel 2 – 6 antenna, with its economical, versatile and space-saving design.
The DCR-Q design was adapted from the existing Dielectric DCR Series FM antenna family, with the goal of producing a more affordable and space efficient low-band VHF solution – a solution needed by broadcasters moving from a UHF to VHF channel during the TV repack. Some UHF broadcasters simply didn’t have the tower space available to support a traditional, large low-band VHF antenna and its associated weight and wind load.
One characteristic of antenna design is that lower frequencies require larger antennas, and low-band VHF TV Channels 2 – 6 antennas are typically the largest of all. The required metal and associated interconnections also add to the cost of the antenna. In some situations, a low-band VHF antenna is too large to use on an existing tower.
The DCR-Q resolves these limitations through a lighter, smaller form factor that can be side-mounted or top-mounted on towers, including structures once deemed inadequate to support low-band VHF systems. Additionally, the adaptation of the DCR Series ring-style design offers excellent circularity. VHF signals generally experience lower building penetration, and adding circular polarization with the DCR-Q improves indoor reception.
Dielectric developed the DCR-Q concept in response to a requirement by Los Angeles broadcaster, KWHY-DT, which voluntarily moved from UHF Channel 42 to VHF Channel 4 as a result of repack.
“KWHY’s plight inspired our engineering department to design and build the low-band DCR-Q VHF antenna,” said Steven Moreen, Dielectric’s Western Regional Sales Manager. “The DCR-Q addresses VHF broadcaster requirements for broadband, high-power handling and circular polarity, in a lighter compact array with support for NextGen TV. We are now productizing the DCR-Q to serve a broader VHF customer base in the United States and international regions where low-band VHF television antennas are in demand.”
The DCR-Q antenna array is comprised of eight ring-style radiating elements. Each radiating element consists of large truncated helical elements, which provide a truly circular polarized signal. While the design borrows key elements from the DCR FM Series, the DCR-Q array is somewhat larger than its FM cousin to meet the low frequency channel requirements.
The DCR-Q is available in a two-bay configuration for low-powered VHF TV stations, and four or eight-bay configurations for medium-powered stations. While normally configured as an omni-directional antenna, the bottom half of a four or eight-bay antenna array can be offset from the upper half, creating a directional signal. This flexibility helped KWHY achieve the optimal directional pattern required to deliver their signal effectively across their Los Angeles service area.
The new KWHY Channel 4 system includes a GatesAir Maxiva VAXTE air-cooled transmitter that went on the air days before the Phase 2 deadline. It was an amazing feat given that Dielectric had only five months to design, build and deliver this unique antenna. With the coverage and performance solidly meeting station expectations, KWHY continues its efforts to educate viewers on antenna selection, with a goal of serving and supporting its viewers.
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