1031 bpf1 1

Lumped Element Filters, using discrete capacitors and inductors, are the technology of choice below 500MHz and are useful to 3GHz. 

Efficient filter prototypes such as elliptic and psuedo-elliptic, which give very steep rejections can be realised.

A very wide range of circuits can be offered :-

Lowpass

Bandpass

Bandstop (Notch)

Diplexers including Lowpass/Highpass...

120308 8170 Phase2MW

Combline filters use coupled rods less than a quarter of a wavelength long shorted at the same end. Typically lengths between 30 and 55 degrees are used giving a compact, mechanically straightforward and versatile filter. 

The unloaded Q of the capacitively loaded rods depends on how the capacitance is realised. Normally a tuning screw inside the resonator produces a resonably high Q. A...

05a 060118 8303 q40 int medium

Interdigital filters use coupled rods one quarter of a wavelength long, shorted at alternate ends. Therefore no end capacitance is required, which simplifies the structure compared with a combline filter at the expense of larger size. They are higher Q than the combline filter and can be designed for wider bandwidths. However stopband is interrupted by passbands at 3x, 5x etc the passband...

120308 8173 Phase2MW

Cavity Filters, where the coupling between capacitively loaded resonators is though an iris, allow complex high Q filters to be realised. Exact synthesis and cross coupling allow steep rejection and loss loss to be realised in a rugged and compact structure. Phase2 Microwave are very experienced in designing cavity filters and diplexers particularly for the cellular market. Lowloss notch filters...

120308 8164 Phase2MW

Waveguide Technology can be used to design low-loss complex filters and multiplexers as well as a large number of other devices. Waveguide designs can handle very high power if designed appropriately.

Phase2 Microwave have a lot of experience in designing waveguide components and specialise in high power designs. Mode matching software allows the exact design or optimisation of many types of...