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fm transmission help needed
hello alli have a modelship wich i want to keep in the range of 5-10meters from an fake island in a pond/pool. i think i need to build an fm transmitter to place on the island and a receiver to place ...
Hobby Circuits and Small Projects Problems :: 10 Jul 2009 2:13 :: Audioguru :: Replies: 9 :: Views: 710
help with designing wireless switch
e serial data output. or, from searching on this forum im wondering if i could use something like a tone decoder? a tone generator connected to the tx module and then a tone decoder on the rx module ...
RF, Microwave, Antennas and Optics :: 08 Jul 2009 10:32 :: kevin360 :: Replies: 2 :: Views: 207
rf switch in 13.56mhz
ghz 1.0dbreturn loss dc - 3 ghz db — 20 —p0.1db 1 ghz dbm — 38 —ip2 two tone, +26 dbm/tone, 5 mhz spacing, > 50 mhz dbm — 96 —ip3 two tone, +26 dbm/tone, 5 m...
RF, Microwave, Antennas and Optics :: 13 Jun 2009 10:19 :: FvM :: Replies: 9 :: Views: 519
wideband matching of rf power amp
hi,i have an ldmos that has an output impedance of 15+j1.1 at 330mhz.i have a big problem to match it in 280-350mhz band using two pi sections.it tunes very shraply with only 5mhz bandwith.1. could a...
RF, Microwave, Antennas and Optics :: 14 May 2009 8:05 :: maniana :: Replies: 5 :: Views: 831
433 mhz rec and transmit problem
dear friends.i m doing a project on transmitting a temperature data ( in the form of voltage)through readily available tx and rx. modules of 433mhz. pair.my question is -- is the encoder and decoder...
RF, Microwave, Antennas and Optics :: 12 May 2009 12:46 :: vfone :: Replies: 2 :: Views: 378
simple fm transmitter
hi ! lately iv made a very simple fm transmitter.http://www.aaroncake.net/circuits/fmtrans2.gifmore info:http://www.aaroncake.net/circuits/fmtrans.aspso the reson i made this post is that its working ...
Hobby Circuits and Small Projects Problems :: 23 Apr 2009 18:25 :: zlatkoMM :: Replies: 9 :: Views: 2166
having problem combining lna, mixer & vco
im doing a design of front end of rf receiver. i have designed the lna, mixer and vco according to my own value by referring to the tutorial from rfic.co.uk. the tutorials are cmos gilbert cell mixer,...
RF, Microwave, Antennas and Optics :: 12 Apr 2009 1:04 :: adeel1314 :: Replies: 22 :: Views: 1557
how to estimate the linearity of rf transformer??
if adding a rf transformer as tc1.5-1(mini-circuits) at the output of a amplifier,how to estimate the linearity of it? supose the output is 12channel +2dbm/channel specs of tc1.5-1 maximum rf...
RF, Microwave, Antennas and Optics :: 05 Jan 2009 2:55 :: fnx7 :: Replies: 9 :: Views: 345
imd problem with a rf amplifier and very linear supposed trt
hello to all,im trying to desing a vhf amplifier for ose ofdm modulation, before apliyying predistortion techniques i have to improve the linearity the best possible. i was tried these 2 transistor fr...
RF, Microwave, Antennas and Optics :: 06 Dec 2008 4:20 :: fjstuden :: Replies: 8 :: Views: 1083
rf & modulation
one thing still confuse me. how different audio frequency at a same time modulate single carrier frequency. i mean a 100mhz fm transmitter is broadcasting music, music contains audio frequency from 1k...
RF, Microwave, Antennas and Optics :: 13 Sep 2008 3:51 :: Code Warrior :: Replies: 7 :: Views: 363
testing the receiver of transceiver chip.
hi! everybody!!i have to test the receiver chin of zigbee based transceiver.the input being lna inputs and output the form adc.i also have a output pin in the chip form the filter which is placed afte...
RF, Microwave, Antennas and Optics :: 08 May 2008 5:38 :: Mazz :: Replies: 12 :: Views: 492
mixer hb noise simulation problem?
of the fundamental frequencies by a small amount, like 1-2 hz. o eliminate any colliding tones in your harmonic balance setup, if present....
RF, Microwave, Antennas and Optics :: 26 Mar 2008 8:19 :: khouly :: Replies: 2 :: Views: 252
budget analysis in ads for i-q path in rf receiver
hi all,how to get budget analysis in ads when there are two path in receiver(i & q).thanksvivek...
RF, Microwave, Antennas and Optics :: 09 Feb 2008 17:11 :: vivek1214 :: Replies: 13 :: Views: 454
help needed to design a class f power amplifier for linc tx
(these spec is for linear pa i suppose), so how do i check my output mask requirement. can i do two tone test using pss (i can apply two tone spaced by 200khz channel small signal into my vco and chec...
RF, Microwave, Antennas and Optics :: 21 Oct 2007 17:04 :: akrathi :: Replies: 0 :: Views: 252
how to simulate the noise in time domain
i noticed some designers say they simulate the receiver noise, e.g. 400uv, how do they get that num, i mean, with lna, mixer, pll, and even the adc? i guess they use the transcient to simulate that no...
RF, Microwave, Antennas and Optics :: 09 Feb 2007 19:39 :: Mazz :: Replies: 11 :: Views: 510
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