20-35-02
20-35-02
20-35-02, 108-136 MHz, Series-Notch Cavity Filter passes a relatively wide band of frequencies while rejecting a very narrow band of frequencies. It is equivalent to a series-tuned circuit. Notch depth is variable from 15-25 dB. Pass and notch frequencies must be known so that the optimum loop assembly can be used. This is the best filter for very close separations (200-400 KHz) in UHF applications.
- Various Low-Loss High-Rejection Models to choose from.
- All Loop Plate/connector assemblies are silver-or Alballoy®-plated for low IM.
- Welded cavity construction and silver-plated tunable probe and loops give superior pass and reject characteristics.
Cascading Filters
All cavity types mentioned above may be cascaded to achieve an arithmetic sum of individual filter attenuation. Up to 6 dB of additional attenuation can be achieved when the proper length of cable is used to interconnect the cavities. (This additional 6 dB does not occur in the filter passband but only at frequencies where moderate to high attenuation occurs.) A TX RX system specialist can assist you in ordering the proper length of interconnecting cable for your frequencies.
Downloads:
| Product Specifications | |
|---|---|
| Item No | 20-35-02 |
| Item Name | 108-136 MHz, Series-Notch Cavity Filter |
| Frequency Range | 108-136 MHz |
| Insertion Loss vs Frequency Separation | (w/ dual cavity, notch depth @ 34 dB) <2.0 dB @ 100 kHz <0.6 dB @ 250 kHz <0.5 dB @ 500 KHz <0.4 dB @ 1 MHz (w/ dual cavity, notch depth @ 44 dB) <3.0 dB @ 100 kHz <0.8 dB @ 250 kHz <0.5 dB @ 500 KHz <0.4 dB @ 1 MHz |
| Impedance Ω | 50 |
| VSWR | 1.5:1 max. |
| Max Power | 60 W @ 100 kHz 250 W @ 250 kHz 350 W @ 500 kHz 350 W @ 1 MHz |
| Cavity Length - Electrical | 1/4λ |
| Temperature Range | -30 to +60 °C |
| Cavity Diameter | 6.625" |
| Number of Cavities | 2 |
| Cavity Height | 31.5", w/ tuning rod extended, 43" max. |
| Width | 6.625" |
| Depth | 6.625" |
| Connectors | N |
| Weight | 36 lbs. |