Filters

C-Band Altimeter Radar Elimination Filter

This uniquely designed low-loss, weather-proved lightweight filter provides suppression of marine and altimeter signal in C-Band. Due to a very low group delay variation, this filter is ideal for digital satellite transmission. Customer-defined pass-band as well as stop-band rejection up to 75dB is available.
The filter shown bellow is 7 poles made from aliminum, silver-plated, weather proved and painted over for reliable outdoor applications.

Parameter Name	Specifications	Datasheet
Pass-Band	3.70 - 4.20 GHz
Pass-Band Insertion Loss @ 3.7 - 4.1 GHz	<0.10 dB maximum
Pass-Band Insertion Loss @ 4.2 GHz	<0.15 dB maximum
Pass-Band Return Loss	>1:1.15 (23 dB) maximum
Pass Band Group Delay Variations	2.5 ns over any 36MHz
Stop-Band	4.25 - 4.40 GHz
Stop Band Rejection	55 dB minimum
Interface	WR229 with CPR229G flanges
Dimensions	8"x5.8"x3.88"
Weight	3 lbs

C-Band Interference Suppression Filter

These low loss, light and robust C-Band band-pass filters had been designed specifically to efficiently suppress strong out of band interference, caused by navigational communications (radar), as well as many types of other terrestrial interference, providing strong rejection of unwanted spurious spectrum below and above the pass-band frequency range from DC to lower Ku-band. These filters also practically eliminate transmit (uplink) band frequencies so a separate band pass filter is not needed.

Parameter Name	Specifications	Datasheet
Pass-Band	3.70 - 4.20 GHz
Pass-Band Insertion Loss @ center frequency	<0.4 dB maximum
Pass-Band Insertion Loss @ band edge	<0.9 dB maximum
Pass-Band Return Loss	>1.25:1 maximum
Pass Band Group Delay Variations	7.5 ns
Rejection
At 3.665 / 4.235 GHz	10 dB
At 3.651 / 4.250 GHz	20 dB
At 3.636 / 4.267 GHz	30 dB
At 3.617 / 4.285 GHz	40 dB
At 3.593 / 4.307 GHz	50 dB
At 3.564 / 4.329 GHz	60 dB
At 3.533 / 4.353 GHz	70 dB
At 3.485 / 4.380 GHz	80 dB
Below 3.485 GHz	more then 80 dB
From 4.380 to 11.130 GHz	more then 80 dB
Interface	WR229 with CPR229G flanges
Dimensions	5.35" x 3.88"x 2.75"
Weight	3 lbs

Ridged Evanscent - mode filters

These low-loss, low power, miniature evanescent-mode band-pass or harmonic filters could be used in applications where filter size and weight are critical, primarily for Ku-Band (up to 20GHz) frequencies and bellow. The filter shown bellow is a 9-poles ridged evenescent-mode filter with direct transforming via resonant windows. Shorter and ligher than conventional filters of this type.

Parameter Name	Specifications
Pass-Band	14.46- 14.9 GHz, Tunable
Insertion Loss	0.16 dB
Return Loss	25 dB
Rejection,Tunable	50 dB at 16.226 GHz
	70 dB at 16.6 GHz
	> 60 dB at 17GHz to 45GHz
Multipaction Power, Watt	N/A
Dimensions, mm	50.7x38x38
Weight, grams	50

Waveguide Band-Pass Cavity Filters

These high-Q, high-power, low-loss filters find numerous applications ranging from wide bandpass filters, up to 20% of the central frequency, to ultra-narrow, less then 1% (notch) filters. These filters are manufactured from aluminum, silver plated. Temperature stable versions, using more stable materials are available. Choice of customer - defined waveguide flanges (choke, cover, hermetic). Optional coaxial interface, customer-defined or standard. The filter shown bellow is WR62 band-pass cavity filter.

Parameter Name	Specifications
Pass-Band	14.700 - 15.250 GHz
Pass-BandInsertion Loss	0.3 dB maximum
Pass-Band Return Loss	24 dB minimum
Rejection	90 dB minimum at F > 13.700 GHz
	70 dB minimum at 13.70 - 14.00 GHz
	20 dB minimum at 14.0 GHz to 14.5GHz
	20 dB minimum at 14.45 - 16.30 GHz
	70 dB minimum at 16.3 - 21.00 GHz
Power, peak	2KW
Dimensions, mm	92x33x33
Weight, grams	58

Harmonic Rejection Filters

WR75 Ku-Band Second and Third Harmonic Regection Filter

WR75 Ku-Band Second Harmonic Filter