RF Filters

RF & microwave filters of IDE include active and passive ones. Their designs comprise of band-pass, high-pass, low-pass, band-reject and notch filters characterized by their small size and weight, high power handling and temperature compensation.

Several methods are used for the design of filter networks, such as Butterworth (maximally flat), Chebyshev (equal ripple) and elliptic filter methods. Group Delay flatness is critical for eliminating linear distortion, a cause of interference to digitally modulated signals. The design technologies provide a Group Delay performance less than or equal to 10 ns. Topologies used are discrete and microstrip line or both, providing an insertion loss less than or equal to 0.5 dB, return loss <= -20 dB and ripple <= 0.1 dB.

Depending on customer needs, IDE can design and build RF & microwave filters up to 10 GHz at low cost, with an input power handling currently measured up to 100 Watt (CW).

The key benefits of IDE RF Filters are:

  • Wide operating temperature range (-40°C to +85°C)
  • High performance with high selectivity
  • Custom filter design
  • Low insertion loss
  • Small form factor

IDE also offers Tunable band-pass filter modules in SMD and DIP packages. These modules are targeted mainly for the RF front-end chain of a receiver and they require only few external components for the final application PCB. They are designed to have low temperature drift due to the built-in temperature compensation algorithm. These modules have a fast SPI interface for connecting to a host controller and a UART interface for control & debugging purposes. Other outputs are also available, such as an analog temperature output for direct reading from the temperature sensor.

Typical characteristics are:

  • Operating temperature range: -40°C to +85°C
  • Insertion loss: -4 dB (+/- 1 dB in full octave)
  • 3 dB bandwidth: 4% to 6%
  • Input P1dB: 0 dBm (typ.).
  • Low power consumption (typ. 10mA @ +5V DC)
  • Small size: 30mm x 45mm x 5mm (typ.)
  • Low weight


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