Druckschrift 99810454, New Broadcast Antenna Solutions for Digital ...

UHF Omnidirectional Antennas
for Small to Medium-Power Sites
6
Gap
With the introduction of digital TV broadcasting, these services are now no longer restricted to stationary receivers with
roof-top Rx antennas, but also permit portable and mobile reception. However, in order to achieve a satisfactory grade of
coverage and to take account of the requirements for higher reference field strengths, gap-filling antennas may be
necessary, at least in urban areas and metropoles. Some broadcasters may even wish to design their networks by using
multiple small to medium power transmitters, similar to a cellular structure.
Kathrein’s portfolio of antennas for these applications includes versions from 400 W to 15 kW, all fully-assembled for
plug-and-play installation. They come fully-radomized, thus featuring very low wind-load figures. This makes them
especially suitable for DTV and DVB-H gap-filler stations.
Collinear omnidirectional antennas, 400 W,
K 73 20 4. series
Type No. / Order No. 750 10114 750 10115 750 10116
Frequency range 534 – 574 MHz 574 – 614 MHz 614 – 662 MHz
VSWR < 1.5
Gain (ref. λ/2-dipole) 7.5 dB 8 dB
Polarization Vertical
Max. power 400 W (at 50 °C ambient temperature)
Wind load (at 160 km/h) 250 N
Length 3113 mm
Omnidirectional antenna, 750 W,
K 73 20 4. series
Type No. / Order No. 750 10060
Frequency range 470 – 702 MHz
VSWR < 1.4
Gain (ref. λ/2-dipole) 3.0 – 4.5 dB
Polarization Vertical
Max. power 750 W (at 40 °C ambient temperature)
Wind load (at 160 km/h) 225 N
Height 1400 mm