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Combline Cavity Filter Design in HFSS

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<strong>Combl<strong>in</strong>e</strong> <strong>Filter</strong> Tun<strong>in</strong>g with Ansoft <strong>HFSS</strong><br />

3 Pole <strong>Cavity</strong> <strong>Combl<strong>in</strong>e</strong> <strong>Filter</strong> – Initial <strong>Design</strong> II<br />

The output parameters by Wenzel/Erl<strong>in</strong>ger Associates filter program, list<strong>in</strong>g the<br />

resonator spac<strong>in</strong>g and the tun<strong>in</strong>g screw gaps above the resonators.<br />

RESONATOR DETAILS<br />

********************************** ---- .21000<br />

* {____} ____________*____<br />

* * GAP<br />

* ************ ---------*----- .16000<br />

* * * *<br />

* * * *<br />

* * * *<br />

* * * *<br />

* * * *<br />

* * * *<br />

* * * *<br />

* * * *<br />

* * * *<br />

* * * *<br />

********************************** ---- 0.000<br />

||<br />

||<br />

D4 GPS<br />

.09400 .31300<br />

RESONATOR SPACINGS AND TUNING SCREW GAPS<br />

Resonator physical length = .16000 <strong>in</strong>ches.<br />

Input tap l<strong>in</strong>e diameter = .05000 <strong>in</strong>ches.<br />

Input tap location above the 0.000 reference plane= .10823<br />

<strong>in</strong>ches.<br />

RESONATOR AND COUPLING ADJUST LOCATIONS<br />

ADJUST RESONATOR RESONATOR SCREW<br />

LOCATIONS LOCATIONS GAP SPACING GAP<br />

||<br />

0.0000 -----*************----- 0.0000<br />

.07750 -----* - * .15500<br />

* + *----- .20200 .01099<br />

.31718 -----* - * .13637<br />

* + *----- .43237 .01397<br />

.54755 -----* - * .13637<br />

* + *----- .66273 .01099<br />

.78723 -----* - * .15500<br />

*************----- .86473<br />

www.optimal-designs.com 6

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