Bird Technologies 44-53-04787-X User Manual
TX RX Systems Brand
UHF Airband Cavity Filter
225-400 MHz
} 8” diameter cavity for easy 19” rack mounting
} RoHS compliant for sale in European Union
} Cavity as a building block can be used in Transmit Combiner, Receive Multicoupler, Cavity filter
(bandpass, vari-notch, or series-notch), or Duplexer
} Best-in-class specification for multi-channel systems with minimal guardbands
Model Number 11-53-01
Frequency Range 225-400 MHz
3dB BW, @ 0.5 dB IL 680kHz @ Fo=250MHz, 850kHz @ Fo=310MHz, 1.03MHz @ Fo=370MHz
3dB BW, @ 0.3 dB IL 1.17MHz @ Fo=250MHz, 1.53MHz @ Fo=310MHz, 1.76MHz @ Fo=370MHz
Max. pwr., per cavity 100 Watts
Impedance 50 ohms
Return Loss (VSWR) 15 dB (1.25:1)
Cavity Elec. Length 3/4 λ
Temperature Range, °C -30 to + 60
Cavity Size, diameter 8” (203 mm)
Number of Cavities 1
Connectors N
Dimensions, HxD 25” x 8”
Shipping Weight 8.6 lbs
Model Number 42-53-04782-X 42-53-04782-X 44-53-04783-X 44-53-04787-X
Cavity Size 8” diameter 8” diameter 8” diameter 8” diameter
Number of Cavities Per Channel 1 2 1 2
Cavity tuning range 225-400 MHz 225-400 MHz 225-400 MHz 225-400 MHz
Minimum Channel Separation 1 MHz 1 MHz 1 MHz 275 kHz
Cavity Insertion Loss 0.5-0.7 dB 0.5-0.7 dB 0.5-0.7 dB 0.5-0.7 dB
Maximum Channel Insertion Loss
(When congured as combiner or multicoupler)
Isolator Insertion Loss n/a n/a 1.0 dB 1.0 dB
Isolation, channel to channel n/a n/a 22 dB 27 dB
Isolation, Antenna to Transmitter n/a n/a 17 dB 17 dB
Maximum Power per channel
(At minimum channel separation)
* X at the end of model number indicates number of channels
30303 Aurora Rd. Solon, OH 44139 866.695.4569 www.bird-technologies.com
Filter_Cavity UHF Airband -10202014
Cavity Receive Multicoupler Cavity Transmit Combiner
1.0 dB 1.5 dB 2.0 dB 3.0 dB
Rx only Rx only 100 W 100 W
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