RF SAW filter where can I buy it?
时间：04-08
整理：3721RD
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Hi,
do you know, where can I buy SAW filter?
the center frequency about between 1500 - 2100 MHz and the bandwith 30 and 40 MHz
Thank !
http://search.digikey.com/scripts/Dk...me=P13002CT-ND
If you can not use a "standard" filter, then I hope you have S500K lying around for NRE!
What do you mean "standard" filter on this frequency? Can you give me example?
What do you mean "standard" filter on this frequency? Can you give me example?
There are some filters that are used for some commercial applications such as DECT, GSM, UMTS etc...
So these filters are easily available and cheap but if you intend to use a special charaterirized filer e.g. particular bandwidth, insertion loss, bandstop attenuation, group delay etc. you have to pay some money to make them manufacture.
This is called as "tooling"..It's very expensive...
Yep, what he said. Saw filters are readily available at 70 Mhz, 140 MHz, PCS and cell phone frequency bands. Saw resonators are available at sonnet frequencies, etc.
Ou, yes, of course. I thought, that you said, that the SAW filt. is not standart.
for example, there http://www.golledge.co.uk/pdf/products/saw/gsrf.pdf is, what I need (for example: TA0727A). But I am trying to find alternative.
And another problem: source is differential impedance. I do not know, how can I do
transmission mictrostrip line to coupled line.
Can you tell me what quantities you need for this SAW filter?
Hi,
check pls (mosten from Epcos, but not only):
Arrow
Newark
Future Electronics
Summit
Sierra IC
Jameco...
K.
Thx, i will look at it.
Added after 1 minutes:
Thank, but is it so important? If you have some tip or offer, give me it ;)
Primary SAW vendors in the world are Epcos, Murata and Tai-SAW (in Taiwan). From my personal experience, Tai-SAW can also do custom design, and the price is <S30K. You can also find other, relatively smaller vendors (for example, check out RFM). Epcos and Murata are the biggest SAW players in the world today. They all have in-house foundries.
SAW devices are differential in nature. Interface is typically differential, and can be described as a resistor parallel to a capacitor. Most vendors issue reference designs, where they "overcome" the differential architecture by means of external BALUNs. HOWEVER, I believe you can just approach the vendor directly, as ask for a differential interface model of the SAW component.
I am a SAW designer, specializing in transversal filters, resonators and correlators.
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