7894D

Eliminate Out-of-Band Interference at your C-Band Receive Antenna
● Low Insertion loss
● Low Group Delay Variation - Typically ≤ 8 ns (Ideal for Digital Applications)
● Economical Price
● Quick Delivery (Stock to 1 Week)
● Less Than 6 inches Long (Fits Under Standard Weather Housing)
● Also rejects transmit band (5.8 - 6.5 GHz) - eliminating the need for a separate transmit reject filter
With low insertion loss and minimal group delay variation, the series 7894D is ideal for digital applications.

The Series 7894D copper waveguide bandpass filter is installed between the feedhorn and the LNB to suppress strong out-of-band interference caused by various radar systems (including AWACS).

Coastal and marine navigational radar frequencies (2.9-3.65 GHz) are just below the receive band and frequently wipe-out transponders 1-5 on satellite dishes installed near harbors. The airport altimeter band (4.25-4.40 GHz) will affect channels 22-24 on satellite dishes located near airports.

Since these filters are installed before down-conversion, saturation of the LNB is prevented allowing clean reception of the entire C-band.

Specifications:
Passband:............................ 3.7-4.2 GHz
Custom Passbands Available Upon Request
Insertion Loss:...................... 0.4 dB Typ at Fo
                                               0.5 dB roll off at band edge
VSWR:.................................. 1.33:1 Max
Return Loss:......................... 18 dB Min
Group Delay Variation:........ Less than 8 ns Typ

Rejection:
25 dB Min............................. 3.65/4.25 GHz
60 dB Min............................. 3.55/4.35 GHz
70 dB Min............................. 3.50/4.40 GHz

Mechanical Specifications:
Weight................................... 2.60 lbs
Dimensions........................... 5 3/4” L x 2 3/4” H x 3 7/8” D
Flanges................................. CPR-229G (Input)

                                               CPR-229F (Output)
* Half gasket is supplied with each model

Additional Product Information