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That's the old T-piece trick Eddie

stubs are now connected in parallel with the 50ohm dummyload,

in this case the open ended 1/2wave repeats an open circuit with no reactance where its an exact electrical 1/2wave,

the shorted 1/4wave inverts to an open circuit with no reactance where its an exact electrical 1/4wave,

leaving just the 50ohm load seen by the analyzer

<blockquote data-quote="bob85" data-source="post: 746272" data-attributes="member: 18">That&#039;s the old T-piece trick Eddie <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt="(y)" title="Thumbs Up&nbsp; &nbsp; (y)"&nbsp; data-smilie="27"data-shortname="(y)" />stubs are now connected in parallel with the 50ohm dummyload,in this case the open ended 1/2wave repeats an open circuit with no reactance where its an exact electrical 1/2wave,the shorted 1/4wave inverts to an open circuit with no reactance where its an exact electrical 1/4wave,leaving just the 50ohm load seen by the analyzer<img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=";)" title="Wink&nbsp; &nbsp; ;)"&nbsp; data-smilie="2"data-shortname=";)" /></blockquote>

[QUOTE="bob85, post: 746272, member: 18"] That's the old T-piece trick Eddie (y) stubs are now connected in parallel with the 50ohm dummyload, in this case the open ended 1/2wave repeats an open circuit with no reactance where its an exact electrical 1/2wave, the shorted 1/4wave inverts to an open circuit with no reactance where its an exact electrical 1/4wave, leaving just the 50ohm load seen by the analyzer;) [/QUOTE]

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