Design antenna for SAW sensor (surface acoustic wave sensor )

[trinhvantrang]

Hi everybody. I'm glad to join this 4rum!!!
Now, I'm designing an antenna for SAW sensor (surface acoustic wave sensor ) and I'm considering two types of antenna: printed yagi and planar spiral antenna. With some requirements:
+ High gain: at least 6-7 dB
+ directional radiation
+ optimal size
+ Bandwith:100MHz (range Frequency: UHF 860MHz-960MHz and resonant Fre: 910MHz)

Who can give me some advices ??? please :sad: . thanks before!!

 

[E Kafeman]

Optimal antenna size, that do we all want to find out. Practical limitations such as available width/length/weight and surrounding dielectric properties makes "optimal size" unique for each project.
Do not know what differ your SAW component compared to a regular 50 Ohm TX circuit, but it sounds as something rather small=>small ground plane. Then is a Yagi a good selection that seems to fit your requirements.
Biquad is else an alternative antenna type which can be somewhat more compact then an Yagi.

 

[trinhvantrang]

I appreaciate you helping me. Thanks so much :smile:

 

[trinhvantrang]

excuse me :-D do u mind if give me your email or facebook address ;-) I have some questions to ask, can u help me!! tks so much

Optimal antenna size, that do we all want to find out. Practical limitations such as available width/length/weight and surrounding dielectric properties makes "optimal size" unique for each project.
Do not know what differ your SAW component compared to a regular 50 Ohm TX circuit, but it sounds as something rather small=>small ground plane. Then is a Yagi a good selection that seems to fit your requirements.
Biquad is else an alternative antenna type which can be somewhat more compact then an Yagi.

 

[E Kafeman]

I do private consulting for living => costs money. You can contact my company.
If you have technical questions, make them here in this forum, it is better to let everyone help you.

 

[vfone]

First of all to cover the 860 MHz to 960 MHz range you need a Log Periodic antenna, because a standard Yagi cannot cover this range with decent gain flatness over the band.
You need a printed Log Periodic Antenna, which actually is not much complicated than an Yagi to build. Search the net an you get a lot of examples.
I don't know how much would cost you calling a consulting company, but from here you can buy a printed Log Periodic Antenna (or printed Yagi) for less than 30 bucks.

https://www.wa5vjb.com/products1.html