Part #: 1080-169

Call (858) 277-3300 to order

» Download Data Sheet (PDF )

  • Engineering Drawing: All dimensions in inches [mm in brackets]
  • Images: Insertion Loss Plot
  • Images: Return Loss Plot

Product Overview

Southwest Antennas Part # 1080-169 is a small cavity bandpass filter designed for operation in federal C-Band radio network applications, with a center frequency of 4,690 MHz and a 20 MHz wide pass band of 4,680 - 4,700 MHz.

The narrow 20 MHz pass band is designed to offer the best performance and out-of-band rejection possible for users with narrow channel assignments, while still maintaining a physically compact product that can be easily integrated into deployed radio systems.

This cavity bandpass filter offers excellent -60 dB out-of-band rejection and is designed to be installed in-line between the radio and antenna, or integrated within other communication equipment when additional RF filtering is required to improve network performance. This bandpass filter is ideal for tactical radio systems, fixed site infrastructure, base station systems, network nodes, or other communication network infrastructure that operates in congested, high-interference RF environments.

Southwest Antennas bandpass filters can be utilized to help eliminate interference by rejecting out-of-band noise from other co-located radios operating outside of the filter's operational bandpass range, providing increased performance for radio systems and attached antennas.

Note: Other federal C-Band cavity filters with a 20 MHz passband are available from 4,400 MHz to 4,940 MHz. Contact Southwest Antennas for ordering information.

  • 4,680 - 4,700 MHz pass band
  • 4,690 MHz center frequency
  • 2.5 dBa Insertion loss at center frequency (typical)
  • 18 dB return loss at center frequency (typical)
  • -60 dB out of band rejection at +/-30 MHz cF (typical)
  • Machined aluminum housing, silver plated
  • TNC(m) and TNC(f) RF connectors
  • Can be quickly added to existing systems to help improve performance


  • Tactical radio systems
  • Federal government radio systems
  • Fixed site / point-to-point communication infrastructure
  • Vehicle mounted radio systems

Filter Specifications

Parameter Value Units Tolerance
Filter Type Cavity Bandpass Filter
Filter Frequency Band C-Band
Filter Impedance 50 Ohms
Filter Frequency of Operation 4,680 - 4,700 MHz pass band
Insertion Loss 2.5 dBa @ cF typical (±5 MHz = 2.4 dBa typical and ±10 MHz = 3.1 dBa typical)
Return Loss 18 dB @ cF typical
Rejection 1 -60 dBc @ Fo ±30 MHz cF typical
Operating Temp -40 to +65 C
Storage Temp -55 to +125 C
Product Length 2.84 / 72.14 inches / mm ±0.020"
Product Width 1.98 / 50.17 inches / mm ±0.020"
Product Height 1.00 / 25.40 inches / mm
Product Weight 14.0 / 396.9 oz / grams
RF Connectors TNC(m), TNC(f)


Data Sheet (PDF )