Teledyne KW Microwave Combline & Interdigital Filters
FREQUENCY RANGE: 30 MHz to 18 GHz
  • BANDWIDTH OF 1% TO 66%
  • LOW LOSS

Combine filters are bandpass filters used in the frequency range of 30 MHz to 18GHz The structure consists of a series of TEM resonators of circular or rectangular cross-section resonated by a capacitor at the open circuit end. The bandwidth and response of the filter is governed by the coupling of each resonator to its immediate neighbor. This is also a function of the resonator size, resonator spacing and ground plane separation. Typical construction is silver-plated aluminum. This achieves the lowest passband loss while maintaining lightweight. Computer design programs result in close correlation between theoretical and actual performance.

In applications where flat group-delay narrowband filters are required, linear phase responses of typically 1 to 5% variations over 70% of the filter bandwidth can be achieved.

As the frequency of operation is reduced, the reactance components increase in physical size. But for a given Q, the size of an air-spaced inductor increases as the frequency decreases.

  Model K2C Model K3C Model K6C Model K7C
FO: (standard) 30 - 450 MHz 400 - 3000 MHz 2000 - 6000 MHz 6000 - 12400 MHz
  (special) 20 - 600 MHz 250 - 4000 MHz 1500 - 14000 MHz 500 - 18000 MHz
Sections 3 to 6 2 to 7 2 to 7 2 to 4
VSWR (Max) 1.5:1 1.2:1 1.2:1 1.5:1
Temperature Range -54° to +100° C
INTERDIGITAL FILTERS
Teledyne KW Microwave’s interdigital filters fill the need for moderate and wide bandwidth filters in the 1.0 to 12 GHz frequency range. Our standard unit is available with up to 17 sections, while custom designs have 20 sections. Teledyne KW Microwave’s interdigital filters offer low loss, high "Q" performance in package styles suitable for many applications, including space.
  Standard Special
Frequency Range 1000 - 10000 MHz 500 - 12000 MHz
Number of Sections 3 to 10 3 to 20
VSWR (Max) 1.5:1 1.3:1
Temperature Range -54° to +100° C
Teledyne KW Microwave
14020 Stowe Drive, Poway, CA 92064
Tel:(858) 842-2993 Fax:(858) 842-2992 email: Teledyne KW Microwave Sales & Marketing