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# Antenna Gain Directivity

113 Threads found on edaboard.com: Antenna Gain Directivity

## helix antenna for gps application

Any one is having the tutorial helix antenna design using HFSS

## what is therange of required parameters for the wlan antenna.

hello i want to know that if i want to deisgn the wlan antenna then what should be its return loss gain directivity efficienies etc etc and other related parameters?

## The Negative Gain on Radiation Pattern, may I know what is the physical meaning?

1) I not sure the "gain" on radiation pattern is refer to Power gain or directivity? The unit is in dBi. In dBi means antenna gain in dB relative to isotropic radiator. 2) I am getting negative "gain" on radiation pattern (E-field). I read from article is antenna Loss. (...)

## Microstrip antenna raray testing

For "industrial grade" testing you will need a test range, and evaluate all required parameters in a free space. You can use an anechoic chamber with special equipment to do it. There are special laboratories which can test your antenna to specifications, and give you an evaluation result to prove your antennas meets "industrial-grade".

## basics of microstrip antenna

hi all, i want to do a project on microstrip antenna an reading on this topic can any one tell what is meant by impedance bandwidth polar and cross polar components in E and H plane ? and their significance what is significance of s11 dhruva:smile:

## Antenna Partial Directivity and Gain

Hello, I am a bit confused about the notion of partial directivity and gain. According to textbooks and papers the total directivity is defined as the sum of the partial directivities (the same for gain). But the common practice to get the sum of two orthogonal vectors is to take the vector sum. i.e. Instead of G (...)

## Please correct me (Horn, PAtch, directivity, GAIn)

Hi all, I have developed a patch antenna with gain around 8dBi. I want to theoratically justify it. Belanis states that if width of the patch is less than lamda than it would directivity is around 8.2 dB. My antenna has the same directivity. Now in order to verify gain I have to do (...)

## can directivity, gain, and power radiated from antenna be measured by equipment?

HFSS calculates directivity, gain, and power radiated, but I was wondering if I can measure them physically (without a simulator). If so, what equipment, technique, etc. is used for that? Please reply ASAP as I have a presentation due soon. Thanks

i'm designing vivaldi antenna with centre frequency 3.3 Ghz (2GHz -4GHz) using CST. Taper length of antenna is 90.9mm for 3.3 GHz. Aperture width 48mm(ie; > 45.5mm). Its having microstrip to slotline transition from 50 ohm to 100 ohm. I am getting efficiency >100%(because gain is more than directivity). how to (...)

## Rectangular Array Antenna

Hello I have designed a single patch rectangular antenna with a waveport and an inset fed. I'm trying to do patches to this antenna and I'm not getting the right results! I'm loosing gain and directivity! Can anyone help me out with this? I can send you guys the single patch! Thanks, Sam

## bandwidth of microstrip antenna circular

Hello, There is no ideal height. It depends on what material thickness you can get, loss factor of dielectric, maximum thickness allowed for the complete antenna, required frequency bandwidth, production tolerance, etc. Generally spoken, reducing the height: reduces the useful frequency bandwidth, reduces the gain (because of increase of dielect

## FM antenna matching using HFSS

You are trying to say that without having a Good impedance Match at the antenna input,you will be able to have a High directivity?????? Yes. Just get an antenna textbook and look at the definition of directivity.

## Anternna,ask a questiones!What's the antenna's passive test and active test?

passive test is as described above, tests of radiation patterns, gain/directivity/efficiency etc... active test can mean many things, but more often than not involves test of the antenna integrated with the intended electronics and running tests within an anechoic chamber that emulates the intended RF environment. The end result is often (...)

## single element vivaldi antenna designing

single element vivaldi antenna designing 2-4 ghz of gain 3dB

## how to increase the gain of microstrip antenna

hello i have designed and simulated a micrpstrip antenna by using Ie3d the parameters i m getting are Fr=6.51 returnloss =-30.86 reflection coffient =0.03 mismatch loss =0.00 vswr= 1.06 directivity is 7.56 dbi gain= 2.56 dbi gain is very low so i want to ask that what is the range of the gain (...)

## Design a log periodic loop antenna for UHF RFID reader

It's not clear to me, why you want to use a helix antenna and which kind of helix antenna you're referring to. The shown picture is rather suggesting a simple λ/2 dipole. If you intend higher directivity respectively gain, a yagi antenna would be first choice.

## Negative Gain for RFID reader

hello, I have been using HFSS to design an antenna at 867Mhz.But the gain that i am getting is -4.9bd and directivity around the same.I have miniaturized the patch antenna.I have even physically implemented it with a reader and got 5 feet range for the tag in vertical and horizontal orinetation.But as the (...)

## Procedure for antenna efficiency measurement

May i know the procedures and set-up to measure antenna efficiency ?

## i) how to excite diferent phase to antenna? ii) why my antenna gives -ve gain?

i) i need to use power divider to connect to array antenna. how can i make each antenna radiate different phase (or was it pointing angle? maybe i wrong in term) if its come from one input feed. thank you i hope, it can be realizeable without phase shifter, but if its really need the phase shifter to produce diferent phase, then at which part sho

## mwo awr 2008 antenna gain calculation

hi can any one help to get calculation of antenna gain from the total radiated power ver. frequency.