Waveguide Directional Tv Combiners

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PRODUCT DATASHEET CW4P Waveguide Directional TV Combiners These constant impedance combiner modules are designed for high power multi-channel UHF television combining applications. The directional filter arrangement is considerably more compact than other waveguide designs using discrete hybrids and filter components. A number of Patents have been granted. Standard designs use three or four pole filter designs for semi-adjacent or larger channel spacings. Six pole filters are used for adjacent channel combiners. Six pole and higher order filters may also perform out of band emission filtering, eliminating the need for another dedicated filter. Each balanced combiner module consists of a pair of waveguide couplers and a waveguide directional filter to provide a module which is functionally identical to a balanced TV combiner module. Modules can therefore be connected together in the same way to provide a multi-channel combiner. The directional filter is a four-port device. Power incident at Port 1 emerges from Port 4 with the frequency response of a bandpass filter while the remaining power emerges from Port 2 with the complementary frequency response of a band reject filter. Port 3 is isolated and no power is reflected from Port 1, if all ports are terminated in their characteristic impedances. In the waveguide version the device is realised by two rectangular waveguides operating in the TE10 mode connected by means of cylindrical direct coupled cavity resonators operating in the circularly polarized TE111 mode. Waveguide Directional Combiner for Ch 28 29, 31 and 35 featuring 3-pole, 4-pole and 6-pole modules FEATURES / BENEFITS High power rating - suitable for transmitters from 6kW to 150kW Compact dimensions, small footprint High power rating High stability Large cross-sectional surface areas provide significantly more peak and average power handling capacity than coaxial lines Much wider bandwidth than conventional waveguide combiners Large range of connectors, splitters and waveguide accessories are available. For detailed technical information use the external document link below. Technical Features STRUCTURE Product Line Combiner TV Product Type Band IV/V (UHF) TV Waveguide Directional Combiner Filter Type Directional waveguide ELECTRICAL SPECIFICATIONS Frequency Range MHz Minimum Channel Spacing 470 - 756 548 - 862 2 Narrowband Input Power (maximum) kW Input Power Comments 21-100 Note#2 Output Power (maximum) kW Output Power Comment 240.0 Ave Note#2,5 Impedance (unbalanced) ȍ Narrowband Input Connector 50.0 Up to 6-1/8" EIA Note#3 Narrowband Input Channel Bandwidth MHz 6.0 7.0 8.0 Narrowband Insertion Loss at Channel Centre Frequency dB < 0.25 Note#1 Narrowband Input Return Loss dB 30 Narrowband Input Min. Group Delay ns 45.0 Narrowband Group Delay Comment Group delay quoted is typical and is dependent on channel bandwidth and operating frequency. Wideband Input Insertion Loss dB 1.0 Wideband Input Min. Return Loss dB 26.0 Narrowband to Wideband Isolation dB 32.0 CW4P REV: 01 All information contained in the present datasheet is subject to confirmation at time of ordering REV DATE: 08 Nov 2016 www.rfsworld.com Page 1 of 2 PRODUCT DATASHEET CW4P Waveguide Directional TV Combiners Wideband to Narrowband Isolation dB 50.0 dB < 0.1 ±3.805MHz > 26 -12MHz > 20 +12MHz Filter Selectivity MECHANICAL SPECIFICATIONS Wideband Input Connector Input and output connectors can be varied from a full range of 50 ohm and 75 ohm coax up to 9-3/16" and waveguide WR1150, WR1500 and WR1800 connectors. Support Frame Yes Weight kg (lb) 120 (264) °C(°F) 0 to 40 (32 to 104 ) TEMPERATURE SPECIFICATIONS Operating Temperature Range External Document Links CW4P Notes REV: 01 All information contained in the present datasheet is subject to confirmation at time of ordering REV DATE: 08 Nov 2016 www.rfsworld.com Page 2 of 2