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nothing to change for 922M
AS3990/1/2 have same pinout but 3990 lower RF power, check datasheet.
as3992 is claimed suitable for dense reader mode (DRM)
UHF reader is a complex toy.
for low cost -
check austriamicrosystems - analog IC, analog semiconductors - Standard IC solutions and ASICs
exactly you need AS3990/AS3991/AS3992 chips - this will be a cheapest solution if you will produce under 1000 units. IC cost about $40...
Pickit2 PCAD and Gerber files
Original schematic with minor changes -
FDC6420C replaced by two separated MOSFETs.
All SMD components, diodes are SOT-23.
vietnam rf regulation
Hello !
I need Vietnam's RF regulation document " General electromagnetic compatibility requirement TCN 68-192:2003 " and any similar and accompanied.
In english.
If someone have it , please share.
Thank you.
cygnal silabs
As reported at http://electronix.ru/forum/index.php?s=c1a3b1bf85e5407817f9c87e018205e7&showtopic=36199&st=15,
it's firmware for USB Debug adapter. work well for 320/321 in original schematic and with minor problems if loaded in Toolstick hardware
**broken link...
ask www.zeland.com about trial of IE3D
or take Sonnet Lite for free from www.sonnetusa.com
both of this two are perfect and IE3D has examples of patch antenas and patch arrays designing.
you cann't take this way if you need power more than few uW.
if you need 2-3 V @ 2-3 uA you have feed from antenna not at 50 ohm but at highter impedance point , for ex at 200-300 ohm - closely to the edge. And You can use diode voltage...
if want to make simulation with finite ground - just drow in this grond plate in your design. You 'll have correct result with Designer same as with HFSS.
Help on RF Amplifier
any MW bipolar transistor from Infineon, Phillips or Renesas with feedback wil be good for really cheapest solution (~35c BOM)
and Amps from Infineon and Phillips you can get for about 50-60 cents.
world space radios frequency
Hello! Does anyone have any kind of documents about frequency allocation of World Space radio.
I know this is about 1452-1492MHz , but i need a document where this is described, something like standard but not an ITU or FCC freq...
check yours yahoo mail , i've sent hfss manual to you.
if you used DXF import of cource you have 2d model or set of FACEs, so you need add volume to model and transform it to the OBJECTs by "SWEEP ALONG VECTOR" function, applied to FACE.
only after that...
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