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Tunable Coax Bandpass Filters
Tunable Bandpass Waveguide Filters
Tunable Diplexers
Fixed Diplexers
Fixed Triplexers
Fixed Quadriplexers
Fixed Coax Bandpass Filters
Fixed Waveguide Bandpass Filters
Dual Bandpass Filters
Weather Radar Components
Weather Radar Assemblies
Satellite Earth Station Assemblies
Power Combiners
Low Pass Filters
Band Reject Filters
Harmonic Filters
High Power Filters
Programmable Filters
AutoTracking Filters
37-40 GHz Filters
Waveguides & W/G Componets

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Harmonic-Reflective Filters

Back to Harmonic Filters

CMC Part Number 601525

Passband Frequency 4.4 - 5.0 GHz
Insertion Loss 0.2 dB max
VSWR 1.3:1 max
Power 1.5 KW CW
Stopband Insertion Loss 2nd Harmonic 60 dB Min
3rd Harmonic 60 dB Min
4th Harmonic 60 dB Min

Reflective Filters

A microwave signal contains microwave energy principally at its fundamental frequency.  In addition there are undesirable multiples of that same frequency called harmonics.  These higher frequency "harmonics" may be removed from the fundamental by use of a mechanical device called a Waffle Iron filter.   A Waffle Iron filter is reflective by design and is a corrugated, varying impedance,waveguide filter with longitudinal slots which provide attenuation to all modes containing harmonic power.

Waffle Iron units have passband fractional bandwidths of 10-20%.  Stop band attenuation is typically greater than 60 dB from the second through the fourth harmonic of the fundamental frequency.

Insertion loss and VSWR in the passband are minimal providing maximum transmission of power to the antenna.  Waffle Iron designs are currently available in waveguide sizes from WR650 through WR42.

NOTE: Our engineering department is standing by to assist you with your particular design requirements.

Specifying Filters
Filter Type & Order
Engineering Assistance



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Coleman Microwave Company P.O. Box 247 Edinburg, VA 22824    1-800-563-3449    1-540-984-8848