Configurable Switched Filter Banks

Low-cost, Customer-Configurable Solution
(20 - 7500 MHz, 2- to 7-Channel)

This product series offers the same high performance as custom filter banks but at a reduced cost. Spectrum Control’s standard switched filter banks (310-020050-XXX series) offer customer-defined passband frequencies from 20 MHz to 7500 MHz with 2-7 channels. Cost reduction is achieved by using common switch manifolds and machined parts that are populated with custom filters. The filter banks are ideal for a wide range of applications where low cost and high performance is required.

Key Features

  • Passband Frequency 20-7500 MHz
  • Up to 7 Customizable Channels
  • Single +5.0 Volt Supply
  • TTL Selectable
  • Low Insertion Loss of < 5.0 dB
  • Fast Switching Speed of < 500 ns
  • High Rejection > 60 dB typical
  • Small Form Factor

Configurable Frequency Bands

Offering customer-defined passband frequencies from 20 MHz to 7500 MHz with ultimate rejection up to 20 GHz, Spectrum Control's standard line of switched filter banks can be used in a wide variety of applications where cost-efficiency and high performance is required. Their rugged construction makes them ideal for military and high-end commercial applications needing superior signal integrity, including electronic warfare (EW) and electronic intelligence (ELINT). With lead times as fast as four weeks, the configurable solution significantly reduces development cycle time, resulting in cost savings and faster time to market.

These high performance, integrated devices use mechanically channelized PIN diode switch manifolds for lower insertion loss and high isolation, as well as lumped element filters for increased rejection, all in a space efficient footprint. They also feature integrated switch drivers with typical switching speeds of 200 nanoseconds.

The TTL-compatible filter banks optimize several characteristics, such as VSWR and passband flatness, in a compact form factor for increased performance as compared to individual components. By using common switch manifolds and machined housings populated with custom filters, these devices are more cost-effective than fully custom solutions. Additional functionality, including gain compensation and leveling, can be added if required.

Spectrum Control's switched filter banks have high isolation/rejection ( > 60 dB typical) and operate from a single +5.0V supply. Laser sealing and environmental ESS for high reliability applications as well as RoHS-compliant versions are available.

Electrical Specifications

Frequency Range 20 - MHz  
Insertion Loss (≥ 35% bandwidth) - 5.0 dB Narrower bandwidth filters will have more loss
Input / Output VSWR (Across Passband) - 1.8:1 Ratio  
Passband Flatness - 1.0 dB Dependent on filter bandwidth
Rejection (3.6:1 Shape Factor) 55 60 dBc Rejection level decreases with lower shape factor
Switching Speed - 200 ns 50% TTL to 90%/10% RF
Supply Voltage +4.5 +5.0 VDC  
+5.0 (±0.5) Volt Supply Current - 50 mA