430 - 440 MHz High Selectivity, High Q, Low Loss Bandpass Filter

430 - 440 MHz High Selectivity, High Q, Low Loss Bandpass Filter
Product Code: 0714
Price: 89.00€
   - OR -   

430 - 440 MHz High Selectivity, High Q, Super Low Loss Bandpass Filter


Bandpass Filter BPF uses high Q coils and capacitors with unloaded Q of more than 1500. Low loss of filter achieved with careful design and adjustment.
Measured results with HP8753ES network analyzer full two port calibrated:
1.82 MHz < -100 dB
3.8 MHz < -100 dB
7 MHz = -100 dB
14 MHz = -95 dB
21 MHz = -95 dB
28 MHz = -81 dB
50 MHz = -67 dB
54 MHz = -64 dB
88 MHz = -51 dB
108 MHz = -45 dB
144 MHz = -36 dB
146 MHz = -36 dB
430 MHz = -0.15 dB, RL -35dB
432 MHz = -0.15 dB, RL -35dB
440 MHz = -0.15 dB, RL -35dB
880 MHz = -20 dB (GSM)
960 MHz = -25 dB (GSM)
1296 MHz = -43 dB
Connectors: "N" Male / Female.
70cm Super low loss band pass filter measured data:
432MHz Low loss bandpass filter zoomed
430 - 440 MHz Band pass filter measured HF
430 MHz Band pass filter measured HF, 50MHz, 88 - 108 MHz Attenuation:
432MHz Super low loss band-pass filter 144MHz GSM 23cm attenuation
Positions of connectors are selected so that the filter can be directly connected to the coaxial relay. Band pass filter enclosed in strong 1mm sheet brass box. Strong mechanics will ensure stability and longevity.
This type of filter will almost nothing disturb noise performance of any wideband preamplifier which is especially important in terrestrial and EME communications. It will further ensure smooth operation in the presence of strong signals.
What others say about Bandpass filters and preamplifiers.
"I received the 2 x BPF144 filters and they work very well.  They have resolved my out of band RFI problem and made my 2M EME station more sensitive to weak signals.  The small O.2 db insertion loss is more than compensated by having the preamps operating in their linear region and not in compression caused by strong local FM broadcast and Aircraft radio systems.  It's a pleasure to do 2M EME now."
73 Paul W2HRO
"LNA test: Two LNA have the same behavior. Gain at 144MHz 25.96 dB, NF 0.68, LNA only Gain 25.73 dB, NF 0.88 dB, LNA + filter. Results seems cosistent and confirm the 0.2 dB loss of the filter.
-1db compression point happened with -3dBm input signal level."
73 Franco I2FAK
"Many thanks, good news today all staff well arrived ! I made DUTs on test this PM to the VNA HP 8510C and to the noise analyzer, congratulations all specs are very well respected ! NF it is a bit better 0.28dB on 144MHz, for the others bands as you say."
73 Sylvain F6CIS
Copyright   2014 - All Right Reserved DUAL Serbia