PROBLEM-ORIENTED SOFTWARE

THE LOWPASS FILTERS

1. Tapered-corrugated lowpass filter in rectangular waveguide

2. Low-pass (harmonic rejection) filter on ridged waveguide

THE BANDPASS FILTERS

1. Bandpass filter on one-side inductive irises

2. Bandpass filter on symmetrical inductive irises

3. Bandpass filter on E-plane all-metal insert

4. Evanescent-mode bandpass filter on ridged waveguide (four possible configurations: with matching transformers and without them, on the double-ridged WG and on the single-ridged WG).

5. Evanescent-mode bandpass filter on ridged waveguide with strip inserts in ridged WG notches for reducing longitudinal dimensions, ohmic loss and increasing stopband.

6. Bandpass filter on the resonant irises rectangular windows

7. Bandpass filter on unilateral large-gap fine-line

THE BANDPASS FILTERS

with elliptic, pseudo-elliptic characteristics or with extracted poles

1. Dual-mode bandpass filter on two or three sections of the circular waveguide with titled rectangular irises as coupling elements

2. Dual-mode bandpass filters on two or three sections of the circular waveguide with off-centered circular irises as coupling elements

3. Bandpass filter on rectangular windows with extracted poles, formed by multi-aperture irises

THE BANDSTOP FILTERS

1. Bandstop filter on E-plane stubs

2. Bandstop filters on mutiaperture irises

THE BIFURCATION TYPE DIPLEXERS

1. Diplexer on E-plane bifurcation and channel filters on all-metal insert, inductive irises or inductive posts

2. Diplexer on H-plane bifurcation and channel filters on all-metal insert, inductive irises or inductive posts

THE L-TYPE DIPLEXERS

1. L-type* diplexer on E-plane tee with tuning iris within tee and channel filters on inductive irises or all-metal inserts

2. L-type diplexer on H-plane tee with tuning iris within tee and channel filters on inductive irises or all-metal inserts

*L-type diplexer is a diplexer on rectangular tee with common port in the straight arm.

THE T-TYPE DIPLEXERS

T-type** diplexer on E-plane tee with tuning iris within tee and channel filters on inductive irises or all-metal inserts

T-type diplexer on H-plane tee with tuning iris within tee and channel filters on inductive irises or all-metal inserts

T-type diplexer on E-plane tee with tuning capacitive iris in common port and channel filters on inductive irises or all-metal inserts

** T-type diplexer is a diplexer on rectangular tee with common port in the side arm

All of programs are based on exact mode-matching or integral equation algorithms for calculation of S-matrices of key-elements at creation of full-wave electromagnetic models. The programs contain the various algorithms of circuit theory synthesis for preliminary design, algorithms of “electromagnetic reconstruction” of circuit scheme components and their initial tuning, iteration algorithms of preliminary tuning of the device as a whole and finally optimization algorithms for fine-tuning. All programs are supplied with problem-oriented User interface (see Demo-version). More detailed information can be sent on request.

Platforms: IBM PC compatible computers with 64 Mb RAM and 200 MHz processor for the most time-consuming calculations. Total time of design, including optimization is from several minutes up to 10 hours.

The programs are available as C++ code (are tested under Linux (without graphic interface), Win32 (Borland C++, Visual C++) on special order.