Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Since individual microstrip antenna radiats very small in θ=90 degree plane, the effect of grating lobe for microstrip array will be smaller than that of most other type antenna arrays. In many cases spacing close to λ shows small effect of grating lobe, but first look at your requirements.
thanks for replying, i am really new in designing the antenna. the formula i already know. what u mean by grating lobes ? can anyone add me in msn? su_yan_e212@hotmail.com
then u know when designing an antenna array, what is feed line width? and how to calculate effective dielectric constant for right and left side impedence? i am using the book: "CAD Microstrip Antenna for wirless applications" and i am using the window application to use it.
You have to define a lot of requirements before select the inter-elements spaicng, at least:
- peak gain
- beamwidth (in both planes)
- radiator element size and coupling
- bandwidth
the grating lobes are not a concern if you don't have to scan the beam away the boresight direction, unless you have an inter-element spacing > 0.9/1.0 Lambda.
Typically the useful range is between 0.6-0.75 Lambda.
But without the above listed information you question is not complete !
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.