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mobile communication project on matlab
hi every1 ive just finished cdma project on fpga boards the design is from a-to-z digital even the summation process if any1 interested i can give a hand...,...
Digital communication :: 01 Nov 2009 15:04 :: aapatel374 :: Replies: 65 :: Views: 6286
simple gps gsm sstem questions
hi all, id like to know how the following gps/gsm module could function. it should be in a car, such that when ever the car moves into a interest point, the gps module should alert in a certain way. i...
Digital communication :: 31 Oct 2009 6:25 :: slapdash :: Replies: 0 :: Views: 54
gsm sim card interfacing with microcontroller
hi to all,i have an idea to interface any gsm sim card directly to microcontroller but not conceptually clear...so pls can anyone tell me that it is possible to do that or not....if possible then what...
Microcontrollers :: 21 Oct 2009 6:56 :: PS23 :: Replies: 9 :: Views: 729
gprs modem interface proceduer
i am starting to design a telemetry system using sms. any sugestions about gsm modules? thanks in advance....
Professional Hardware and Electronics Design :: 17 Oct 2009 3:44 :: printed circuit girl :: Replies: 191 :: Views: 52069
sim300d antenna traces routing
hello i am putting sim300d in my design. it provides gsm rf antenna interface via its smd pins. manual says that the routing should be a microstrip line to the antenna. i intend to connect it to an of...
RF, Microwave, Antennas and Optics :: 13 Oct 2009 11:20 :: ShahbazAli :: Replies: 0 :: Views: 96
[vswr] q2686 antenna specification
hi friends i have one gsm quad band antenna with gain 2 dbi and vswr < 2 : 1is this suitable for q2686 wavecom module ? in the antenna specification for the module; vswr is given as : rx max 1.5 : ...
Professional Hardware and Electronics Design :: 07 Oct 2009 12:09 :: gsmman :: Replies: 0 :: Views: 93
urgent !! pls help ... insertion loss of rg# rated cables ?
hi friends please help me to find anrf cable with less than 1db attenuation @ 900mhz what will be the insertion loss of rg# rated cables ?/ plss helpthanks in advanceroy...
RF, Microwave, Antennas and Optics :: 04 Oct 2009 16:40 :: biff44 :: Replies: 6 :: Views: 141
sim340e b2b connector/antenna adapter cable
hi friends i am new to gsm and i want to use sim340e gsm modem. unfortunately the board to board connector entery is not available to our local distributor :( can we go for other board to board conne...
Microcontrollers :: 30 Sep 2009 13:34 :: gsmman :: Replies: 0 :: Views: 54
why do we use the 60 ghz band?
ders use microwave links @ ~30 ghz to transmit data with high capacity. why cant they use their own gsm/wcdma/etc. frequency bands for the same purpose?2. given that they have a physically larger band...
RF, Microwave, Antennas and Optics :: 29 Sep 2009 17:13 :: Pushhead :: Replies: 3 :: Views: 180
square wave noise filter for a microphone preamp
on a dspic, should i use digital filtering? is it possible to eliminate this, how do they do it on gsm phones?any suggestions?thanks,zedman...
Analog Circuit Design :: 29 Sep 2009 13:39 :: Zedman :: Replies: 10 :: Views: 261
sim300
hi everybody, is here any one working on sim300 if so, is there any thing to be added other than the circuit provided in schematics provided in ver 2.02. because i getting rdy after power on but its n...
Professional Hardware and Electronics Design :: 16 Sep 2009 9:54 :: mpch_elec :: Replies: 145 :: Views: 37171
gsm jammer
well as a small project one of my frnds wanted to design a gsm jammer circuit.what wud be the requirements for such a design. he wanted to know more abt this ckt.. is it possible to jam cdma signals.....
Hobby Circuits and Small Projects Problems :: 15 Sep 2009 18:39 :: AKSHAYVH :: Replies: 65 :: Views: 29753
gsm antenna output impedance
hii am using a gprs/gps modulei face a strange problem suddenly the gprs is not working and when i measure the impedance on the antenna connector i found it equals to 1.2 ohm, i m expecting to see 50 ...
RF, Microwave, Antennas and Optics :: 10 Sep 2009 16:49 :: GSM Man :: Replies: 8 :: Views: 306
need suggestion for choosing ms project
hello i have my bachelor in electronics and wish to do ms in communication.i have interest in digital/satellite communication and computer networking and wish to learn further by choosing project (gen...
Digital communication :: 03 Sep 2009 10:59 :: Communications_Engineer :: Replies: 4 :: Views: 201
amount of magnetic flux density in the antenna gsm
hello all friendsplease help me about with of electric and magnetic field intensity in the antenna gsm and amount of magnetic flux density in gsm and also show them by chart according v/m am/m and te...
RF, Microwave, Antennas and Optics :: 02 Sep 2009 7:18 :: mehdi_an :: Replies: 0 :: Views: 69
sim300 breakout pcb design - let's fab some pcbs :)
hello,some time ago someone mentioned that they have designed a breakout pcb for that pesky gsm module - but the thread went dead and i didnt hear back from that person.if anyone had done a pcb design...
Professional Hardware and Electronics Design :: 26 Aug 2009 10:07 :: bsj :: Replies: 43 :: Views: 10531
re: designing antenna matching circuit - newbie question
in fact here is the sonnet design file im using for the murata footprint...
Electromagnetic Design and Simulation :: 20 Aug 2009 4:58 :: rubeng :: Replies: 1 :: Views: 269
question about impedance/resistance
resistance? how about antennas? do all of them have 50Ω dc resistance? for example antenna of gsm radio base station. thanks....
RF, Microwave, Antennas and Optics :: 07 Aug 2009 10:54 :: htforever :: Replies: 2 :: Views: 174
ieee paper - a wide bandwidth and wide beamwidth cdma/gsm...
xplore.ieee.org/iel5/25/30904/01433236.pdf?arnumber=1433236a wide bandwidth and wide beamwidth cdma/gsm base station antenna array with low backlobe radiationwong, t.p.; luk, k.m.vehicular technolog...
RF, Microwave, Antennas and Optics :: 23 Jul 2009 15:31 :: wave85 :: Replies: 1 :: Views: 207
ieee papers- urgent (30 points)
- 3939digital object identifier 10.1109/tap.2005.8599174.a wide bandwidth and wide beamwidth cdma/gsm base station antenna array with low backlobe radiationwong, t.p.; luk, k.m.vehicular technolog...
RF, Microwave, Antennas and Optics :: 22 Jul 2009 11:03 :: Ashubhu :: Replies: 1 :: Views: 207
gsm and cdma antenna
can anyone compare gsm and cdma antenna of bts for me.thank for reading...
RF, Microwave, Antennas and Optics :: 14 Jul 2009 5:37 :: bkd :: Replies: 2 :: Views: 282
sim300/sim305 without antenna?
all most all the mobile phones are not having external antenna. they are doing some work in pcb so it works as antenna. they dont requier any antenna.could anybody help me out how to use sim300 with o...
PCB Routing & Schematic Layout software & Simulation :: 13 Jul 2009 19:37 :: GSM Man :: Replies: 5 :: Views: 357
the difference between 2 g and 3 g antenna, cdma and gsm ant
hi guyi need the diference between 2 g and 3 g antenna, also gsm and cdma antenna. if you guy have them, please put them on this topic...
RF, Microwave, Antennas and Optics :: 08 Jul 2009 8:26 :: bkd :: Replies: 0 :: Views: 141
want information on antenna rediation pattern used in gsm
r-sector to do that can anybody help me how to do thati dont have any idea on antenna being used in gsm...
Digital communication :: 07 Jul 2009 18:24 :: catchpraful :: Replies: 0 :: Views: 185
help regarding sim340e
hi guys,i am new to gsm and i wnat to use sim340e gsm modem. i have to interface it with 8051 controller and have to reaceive/transmit data through gsm network. i have selected sim340e but now i am co...
Microcontrollers :: 20 Jun 2009 8:11 :: choto :: Replies: 2 :: Views: 246
rf switch in 13.56mhz
ow insertion loss, highisolation, small size and low cost are required.typical applications are for gsm and dcs handsetsystems that connect separate transmit and receivefunctions to a common antenna, ...
RF, Microwave, Antennas and Optics :: 13 Jun 2009 10:19 :: FvM :: Replies: 9 :: Views: 519
problem with terminal gsm mc35i
hi, i can not get answers when you send an at command for hyperterminal led to the terminal is psycho normal, put the 2 pictures attached configuration of the hyperterminal thanks for the help...
PC Programming and Interfacing :: 12 Jun 2009 17:07 :: fmiksian :: Replies: 2 :: Views: 288
2.4ghz or 5.2ghz ifa (inverted "f" antenna),who ha
i am doing some simulations with ansoft hfss on ifa.the 2.4ghz dimension fits good both on simulation and measurment with the reference dimension.i want to simulate the 5.2ghz ifa, but i have no refer...
RF, Microwave, Antennas and Optics :: 08 Jun 2009 10:12 :: hasanynlmz :: Replies: 82 :: Views: 11930
gsm mobile network- need ideas and help to start the project
or my graduation project in cce computer and communication engineering.... i am thinking in a small gsm mobile network in the legal frequency domain .... please help me start .... if u can share me ur...
Digital communication :: 08 Jun 2009 7:35 :: leekk8 :: Replies: 6 :: Views: 567
wavecom gsm no activity - how should hte device be powered?
i recently purchased (ebay) a wavecom gsm module which came with the device itself, serial cable and antenna. after connecting the device to the computer, there is no activity light, should there have...
Digital communication :: 05 Jun 2009 10:19 :: dalekurt :: Replies: 0 :: Views: 144
sim700d: what should the min signal quality be for gprs?
r not detectable<ber> (in percent): 0...7 as rxqual values in the table in gsm 05.08 [20] subclause 8.2.4 99 not known or not detectablealso i wonder, can i mea...
Professional Hardware and Electronics Design :: 02 Jun 2009 17:33 :: BasePointer :: Replies: 2 :: Views: 315
gsm signals detection
hi,, i have a question about gsm signals,that when we make or receive calls what kind of signals are there and can we detect these signals??...
Digital communication :: 18 Apr 2009 6:28 :: pranam77 :: Replies: 16 :: Views: 1161
wireless notice board help
r and the other to a receiver with a lcd module.to increase the range i have thought of involving a gsm kit so that using sms i can display the data reqd on the notice board. the problem is i dont kno...
Embedded Systems and Real-Time OS :: 11 Apr 2009 6:51 :: pramodm :: Replies: 4 :: Views: 483
what value does the solution frequency i need to setup?
hi,everybodyi design a dual-band antenna with the hfss software. the antenna is designed for the gsm system and has the operation frequency of 900 mhz and 1.8 ghz, respectively. but the hfss simulator...
RF, Microwave, Antennas and Optics :: 09 Apr 2009 16:41 :: weiweia :: Replies: 1 :: Views: 117
gsm band stop filter in gsm frequency with hfss
hi guys , i want to design a bandstop filter in gsm frequency ( 870 mhz - 960 mhz ) with hfss , i am an amateur. this filter is for transmittering antenna and my prof wants the filters capacity upto ...
RF, Microwave, Antennas and Optics :: 30 Mar 2009 10:57 :: kspalla :: Replies: 3 :: Views: 408
second harmonic in gsm(900)
in gsm 900, the gsm modem i am using has a radiated second harmonic more than -30 dbm (violates etsi). testing the modem revealed that the conducted second harmonic at 1800 was -42 dbm. my antenna gai...
RF, Microwave, Antennas and Optics :: 25 Mar 2009 4:54 :: kspalla :: Replies: 7 :: Views: 735
one antenna for wlan and bluetooth
hi,is it possible to use only one antenna for a wlan / bluetooth application if the antenna is multiplexed? does someone know such a device? i thougth it can be implemented like this:pcb antenna (2.4g...
RF, Microwave, Antennas and Optics :: 06 Mar 2009 7:30 :: kspalla :: Replies: 9 :: Views: 618
antenna detector circuitry
,does anyone know how it is possible to implement a low-cost effective antenna detector circuit for gsm, umts and gps technologies?i need material, whitepapers, and possibily reference designs.thank y...
RF, Microwave, Antennas and Optics :: 21 Feb 2009 18:32 :: McShamrock :: Replies: 2 :: Views: 183
antenna simulation in matlab
i need code for antenna simulation in matlab .can please anyone help me?...
Electromagnetic Design and Simulation :: 18 Feb 2009 20:26 :: aze :: Replies: 5 :: Views: 780
gsm module "siemens mc55"
hii am planning to use gsm module to interface it with pic microcontroller to send and receive sms, can u recomend me any modules u worked with, i have searched the web and found the mc55 from siemens...
Microcontrollers :: 23 Jan 2009 19:39 :: gorkin :: Replies: 2 :: Views: 1254
dual band gsm antenna
hai alli just found homemade antenna for dual band gsm.http://images.elektroda.net/6_1229491746.jpgbut didnt found the dimention and size.someone had spesification?thankshuys cobb...
RF, Microwave, Antennas and Optics :: 29 Dec 2008 0:04 :: Aya2002 :: Replies: 1 :: Views: 633
gsm 900 antenna
hy guys!i design a patch antenna for gsm 900 but it not cover all the band (880 mhz-960 mhz) and i would like to know if a patch its a good idea?how to cover this band? do i make a stacked antenna? af...
RF, Microwave, Antennas and Optics :: 25 Nov 2008 14:39 :: balaguru thavamani :: Replies: 4 :: Views: 630
help!some like oscillating.what's the it?
when i dont add signal to my chip,it shows about -50dbm signal at 1.8g.why?is my chip is osillating ,but its so small.its a differential amplifier.who can tell me whats that?thanks........
Analog Circuit Design :: 25 Nov 2008 8:27 :: saro_k_82 :: Replies: 18 :: Views: 462
reflective open and reflective short switch
what is the difference between reflective open and reflective short rf switches?what are the applications for each of them ?for selection between 2 anttena for a transceiver which of them should be us...
RF, Microwave, Antennas and Optics :: 07 Oct 2008 8:47 :: kspalla :: Replies: 6 :: Views: 228
antenna article
) perez, v.f. fernandez, l.n. tejedor, j.v.b. analysis of proposals to reduce sar levels from gsm terminals published in: microwave symposium digest, 2001 ieee mtt-s international, 2001volume: 3...
Electromagnetic Design and Simulation :: 01 Oct 2008 23:00 :: simotic :: Replies: 4 :: Views: 252
sar _ antenna _ articles
) perez, v.f. fernandez, l.n. tejedor, j.v.b. analysis of proposals to reduce sar levels from gsm terminals published in: microwave symposium digest, 2001 ieee mtt-s international, 2001volume: 3...
RF, Microwave, Antennas and Optics :: 01 Oct 2008 5:11 :: simotic :: Replies: 0 :: Views: 189
give me good gsm
i work project contain 8051 and gps reciver and gsm help me in to find the suitable gsm mdoule for my project(gsm work in serial , low cost)...
Microcontrollers :: 28 Sep 2008 13:55 :: fatima_just :: Replies: 6 :: Views: 510
gsm module at commands
hi,i am using sim300d gsm module.issue 1: are there any at commands , which can be used to stop +cbm.i get +cbm: 6128,50,1,1,1+cbm: 6128,50,1,1,1+cbm: 6128,50,1,1,1+cbm: 6128,50,1,1,1+cbm: 6128,50,1,...
Professional Hardware and Electronics Design :: 27 Sep 2008 6:21 :: movie_freak :: Replies: 6 :: Views: 1959
tracking system - gps or rf ?
nsit products. i have googled such systems and also on this board, most of the people suggest a gps-gsm embedded system i.e. finding the location through a gps module and transmitting the information ...
RF, Microwave, Antennas and Optics :: 23 Sep 2008 13:44 :: vfone :: Replies: 3 :: Views: 276
can anybody help me to find these ieee papers,thx.
optical technology letters, v 50, n 4, april 2008, 1126-32 2. internal meandered loop antenna for gsm/dcs/pcs multiband operation in a mobile phone with the users handchun-l lin (dept. of electr. en...
RF, Microwave, Antennas and Optics :: 01 Sep 2008 5:09 :: bambio :: Replies: 1 :: Views: 165
gsm module for mms
hi, has anyone tried using gsm module to send mms? my intent is to use a micro-controller to control the gsm module to send and receive mms to and from a mobile phone. any recommendations for the gsm ...
Professional Hardware and Electronics Design :: 03 Aug 2008 4:48 :: Yeeching :: Replies: 1 :: Views: 363
ieee paper request
send to mei am need to study that paper to do my project. hope i can get that paper that relate for gsm band frequency 880 960mhz and 1710-2170mhz...
Electromagnetic Design and Simulation :: 23 Jul 2008 0:59 :: kyg :: Replies: 2 :: Views: 198
reduced size ground plane antenna
hi to all! i need to design a dual band antenna with reduced size ground plane for my thesis: does anyone have any suggest or article?thanksbye...
Electromagnetic Design and Simulation :: 22 Jul 2008 4:32 :: balaguru thavamani :: Replies: 3 :: Views: 225
ieee paper request
t identifier:10.1109/iwat.2007.370128summary:compact folded dipole antenna which covers 5multiband gsm850 gsm900 gsm1800 gsm 1900 and umtshope u all can help meregardskyg...
RF, Microwave, Antennas and Optics :: 18 Jul 2008 9:51 :: YCChiou :: Replies: 1 :: Views: 186
want seminar topics
want seminar topics in electronics and communication engineering...
General :: 17 Jul 2008 5:40 :: chandregowda :: Replies: 1 :: Views: 462
what is a difference in electrical and mechanical tilt?
dear all, i am confused about both types of tilts given to bts antenna in gsm networks. someone please clarify it. thank you....
RF, Microwave, Antennas and Optics :: 17 Jul 2008 5:09 :: balaguru thavamani :: Replies: 2 :: Views: 261
microstrip design
hi to all!can anyone tell me how to design a 50ohm microstrip line that work on 900mhz, 1800mhz, 2100mhz, 2500 mhz?i have to built in on fr4 (epsr=4.4 tangentloss=0.02 1.6mm thikness) to feed a monopo...
Electromagnetic Design and Simulation :: 02 Jul 2008 18:16 :: RF-OM :: Replies: 13 :: Views: 819
ieee papers request
613 - 619digital object identifier 10.1109/tap.2005.863088low-profile planar monopole antenna for gsm/dcs/pcs triple-band mobile phonelee, g.; chiou, t.; wong, k.; wang, c.antennas and propagation s...
Electromagnetic Design and Simulation :: 28 Jun 2008 18:23 :: Bhanumurthy :: Replies: 1 :: Views: 162
homemade antenna for triband gsm
hallodid someone had url link how to made vertical type (omni) antennas for triband gsm?thankshuys...
RF, Microwave, Antennas and Optics :: 27 Jun 2008 8:18 :: huys cobb :: Replies: 6 :: Views: 267
omni directional for gsm
hallodid someone know hows to made omni/vertical antenna for tri band gsm/gprs900/1800/1900mhz?thankshuys...
Digital communication :: 24 Jun 2008 8:32 :: huys cobb :: Replies: 2 :: Views: 184
need layout skill about antenna
hi i need some document about gps or gsm or wlan... antenna pcb layout or layout skill anybody can help me ?thanks in advance!...
Professional Hardware and Electronics Design :: 06 Jun 2008 15:06 :: bless_fooling :: Replies: 0 :: Views: 201
please recommend textbook of communication system.
i need the communication textbook with more mathmatics derivation and explain in more detail.thanks,...
Digital communication :: 06 Jun 2008 8:18 :: ittefaq11 :: Replies: 56 :: Views: 5118
double ground plane?
hi to all!im trying to simulate a 3 band microstrip monopole for gsm/gprs/umts usb modem. the problem is that the monopole is connected to the pcb but there is another pcb under the first one; ive don...
Electromagnetic Design and Simulation :: 01 Jun 2008 12:13 :: on1 :: Replies: 4 :: Views: 186
help me with the monopole simulation (hfss)
t there are error or mistakes. i remember the ant should work as the lambda/4. i want it to work at gsm 900mhz, dcs 1800mhz and pcs1900mhz. what should i do to modify the design?please give me some ad...
RF, Microwave, Antennas and Optics :: 30 May 2008 3:30 :: SparkZhang :: Replies: 4 :: Views: 636
plastic material hfss
hi to all. im simulating a monopole for an gsm/gprs/edge/umts/hspa application but i have a problem. the monopole is located on a plastic support (thickness=1mm) 3mm over fr4 substrate. (see image for...
Electromagnetic Design and Simulation :: 29 May 2008 23:20 :: Azulykit :: Replies: 3 :: Views: 201
a dual band circularly polarised microstrip antenna
i want to know that in sonnet software1- is it possible to simulate rectangular ring microstrip antenna hiow?2-can probe feed may be given on patch surface diagonally how?...
Electromagnetic Design and Simulation :: 29 May 2008 14:05 :: Manjunatha_hv :: Replies: 3 :: Views: 381
problem with antenna measurement setup...
since a long time im trying to resolve my doubt but its still present.im dealing with antennas for gsm, wlan applications. small printed antennas on pcb or also ceramic chip antennas. when ive to rea...
RF, Microwave, Antennas and Optics :: 14 May 2008 15:57 :: ghb :: Replies: 3 :: Views: 315
bluetooth antenna vs gsm antenna
dear all, many gsm phone embeded bluetooth function. how bluetooth shareantenna with gsm module? you know gsm work in different band from bluetooths.best wishes...
RF, Microwave, Antennas and Optics :: 14 May 2008 15:47 :: ghb :: Replies: 3 :: Views: 138
gsm 900 repeater design
first hello to all, it should be my first post here...im trying to design a gsm 900 repeater with this scheme:directive antenna --> lna --> amp+agc --> pa --> omni antennadirective antenn...
RF, Microwave, Antennas and Optics :: 04 May 2008 7:13 :: DDavid :: Replies: 6 :: Views: 471
improve gsm antenna
hi alli bought a gsm module for send sms . and i want send sms to another modem that it located in desert!!!!!!!!! so , there, we doesnt have any antenna . i want send sms and transmit data to that mo...
RF, Microwave, Antennas and Optics :: 03 May 2008 8:24 :: vfone :: Replies: 3 :: Views: 168
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