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  Topic: Transmission Line Tutorial from Main Site-Possible Mistake?
scubasteve

Replies: 2
Views: 2436

PostForum: Questions Related to Antenna Theory   Posted: Wed Mar 01, 2017 6:06 pm   Subject: Transmission Line Tutorial from Main Site-Possible Mistake?
It looks like the minus sign in the denominator is correct, but there should also be a minus sign in the numerator.

what causes either term to change from a positive in the first line to a negative ...
  Topic: Slotted Waveguide Antenna Circuit Model
scubasteve

Replies: 0
Views: 1725

PostForum: Questions Related to Antenna Theory   Posted: Wed Mar 01, 2017 6:04 pm   Subject: Slotted Waveguide Antenna Circuit Model
Hi. I was reading the page on slotted waveguide antennas http://www.antenna-theory.com/antennas/aperture/inputimpedance.jpg
but how can you determine the slot admittance? Is there an analytical way ...
  Topic: Friis Transmission Equation Frequency Dependence Question
scubasteve

Replies: 3
Views: 2696

PostForum: Questions Related to Antenna Theory   Posted: Wed Mar 01, 2017 5:30 pm   Subject: Friis Transmission Equation Frequency Dependence Question
But whatever you are doing, you should expect more pathloss at higher frequencies.

Can you explain why this is in the context of the rest of your comment? It has nothing to do with free space loss, ...
  Topic: Friis Transmission Equation Frequency Dependence Question
scubasteve

Replies: 3
Views: 2696

PostForum: Questions Related to Antenna Theory   Posted: Mon Feb 20, 2017 2:13 am   Subject: Friis Transmission Equation Frequency Dependence Question
On [url=http://www.antenna-theory.com/basics/friis.php]this page you say that an important result of the Friis Transmission Equation is the frequency dependence of path loss, that more path loss is se ...
  Topic: what would be the ideal cellphone antenna?
scubasteve

Replies: 2
Views: 5560

PostForum: Questions Related to Antenna Theory   Posted: Sun Feb 19, 2017 10:49 am   Subject: what would be the ideal cellphone antenna?
it depends what you mean by better?

It might increase the gain if you made it longer but then it would be more directional and you might lose signal when you rotate your phone isn't that right :cr ...
  Topic: Transmission Line Tutorial from Main Site-Possible Mistake?
scubasteve

Replies: 2
Views: 2436

PostForum: Questions Related to Antenna Theory   Posted: Sun Feb 19, 2017 10:44 am   Subject: Transmission Line Tutorial from Main Site-Possible Mistake?
Hi.

First post here so if I've gotten any of the etiquette wrong please let me know.

In http://www.antenna-theory.com/tutorial/txline/impedance4.jpg

In the last line, I believe what is hap ...
 
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