surface wave in momentum ads?
how we can visualize surfaces waves in momentum ads ?
thank u
and when i simulate antenna patch with heigth of substrat =h1 , and after i increase heigth to h2 , I get a enlargement in the bandwidth and an augmentation in directivity and a diminution in gain
this is due to surface wave , because my antenna is well adapted , and i impose loss dielctric equal to 0!
but i can't imagine a propagation of surface wave with inifinite ground plane!
please guide me
i simulate (02) groups of (02) patch antennas
1(st) group: epr=2.2 + h(height)=1mm
2(nd) group :epr=2.2 +h(height)=2mm
in first group i found s21=-22.028dB.
in second group i found s21=-23.74dB
normally when i increase height for 1mm to 2mm , coupling will increase , because surfaces wave will be excited , but in my case i found that coupling coupling has decreased !
is momentum ADS takes into consideration the waves sufaces?
and please , SUGGEST me a solution!
thank u
please ,
its starting to annoy me , if someone can (simulate theses two group in ads momentum ) , I will be grateful :)
I want to know where is the problem , its very important for me
:::::
:::group1: (02) patch antenna (constant dielctric (epr)=2.2 ; h=1mm ;fr=5.8GHz ) , distance between patch antenna =25.8621mm(distance between port to port not edge to edge) )--------i found s21=-22.028dB
dimonsion of patch antenna (both) : L=16.85mm ; W=9mm
:::group2: (02) patch antenna (constant dielctric (epr)=2.2 ; h=2mm ;fr=5.8GHz ) , distance between patch antenna =25.8621mm(distance between port to port not edge to edge) )--------i found s21=-23.74dB
dimension (both) :L= 15.85mm ; W=12mm
its easy and does not take time :)
I want a confirmation!
thank you very much!