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24 Threads found on edaboard.com: 1900mhz
Different frequencies are used in different countries. There is no 'correct' answer to your question. In most places (but not all): Cell phones around 650 - 700 MHZ, 880MHz to 980MHZ, 1800 - 1860MHz. Wireless telephones 1.6 - 1.7MHZ, 36 - 37MHZ, 1900mhz WLAN 2.4GHz - 2.5GHz, 5.1 - 5.2GHz The primary distinction is by frequency band but there are
I would like to generate fully differential quadrature signals of 950MHz using PLL Frequency Synthesizer from 1900mhz differential VCO with low power. Currently, I realize this by D-FF based on master-slave latch structure using CML. However current consumptions are fairly large. Alternate idea I have is using two D-FFs based on TSPC where o
Check the link for filters for GSM 900MHz, GSM 1800MHz, GSM 850MHz, or GSM 1900mhz, depend what band you are looking for.
Hello, I am designing a board which has a Zigbee and 3G module (both). What are the things/points that I need to consider when designing such a board. I believe that Zigbee may interfere with Wifi (2.4GHz) ISM band. But, in case of 3G the bands of operation are 850,900,1800 and 1900mhz (SIMCOM SIM5320 3G module). WIll I need any special consider
Why is it that sprints cell phone network can handle so many people? why can it send and receive so much information at one time? my understanding is; cell phone signals exist as frequencies, and when outside, that signal takes up space in the frequency chart? like I know they function on the 900 and 1900mhz frequency range, but why can so many p
Now I am designing a circuit for IQ modulating. The main chip is HMC497, from hittite microwave. It seems to be all right that I was able to modulate the baseband signal with the LO signal to get an IQ-modulated rf signal. But when I test the EVM of the output, such as at 1900mhz, I found a puzzling question. When I use the E4438, from agilent, as
Hii all, I am doing a summer rf project on cellphone booster, specifically a 850Mhz/1900mhz bidirectional amplifier. I am new to rf, just started self learning it. I have an oscilloscope 15Mhz BK precision 1477, I wanted to ask if it would be any use in measuring when I build a prototype board. Thanks
There are few unknowns. Is nothing specified about modulation used. Also 1900mhz is not a free-license band, whatever power is transmitting.
You can use as base modul SIM5210 - GSM, GPRS/EDGE,WCMDA2100, or 1900mhz , HDSPA 7.2 Mbps, interfaces: USART,USB2.0, PCM, SD Card, SIMcard, Audio, Camera,.. or modul SIM306,...
Hallo Did someone know how's to made omni/vertical antenna for Tri Band GSM/GPRS 900/1800/1900mhz? Thank's Huys
Hi All, I am a Final Year Degree Student. I have problem on design a multiple band (cover 850MHz, 1800MHz, 1900mhz and 2100MHz) PIFA with Grounded CPW Ground Plane. I have serveral question on it: 1. What is the material commonly used for the Grounded CPW? Can you specify all layer height? 2. How to calculate the CPW width by consider a
Hi All, I am a Final Year Degree Student. I have problem on design a multiple band (cover 850MHz, 1800MHz, 1900mhz and 2100MHz) PIFA with Grounded CPW Ground Plane. I have serveral question on it: 1. What is the material commonly used for the Grounded CPW? Can you specify all layer height? 2. How to calculate the CPW width by consider all
- Use decoupling capacitors with SRF at second harmonic. - Increase the parasitic coupling between signal paths of low bands (850/900MHz) and high bands (1800/1900mhz). The coupling shall be greater than 30dB. - Try to calibrate the last PCL with 1dB lower (it will improve the talk-time and harmonics)
Hello Is it possible to design LNA at 160MHZ with ATF34143? Is there any DOC on this? Can we use designs at 1900mhz and convert it to 160MHZ with some calculations?
RF PA output power is about 1W,frequency is 1900mhz,LGA package.which PCB is suitable for this package?
I am trying to build a GSM phone repeater that will work under 850MHz or 1900mhz frequency band which are main band in canada. I am looking for a very small and a basic repeater (not those big and huge and complicated ones) that will give me some gain even if a gain of less than 1Watt. Could you please tell me where can I find a place to get t
NE6510179A is not working at 2.4GHz (is a PCS transistor ? 1900mhz) and the linear output power (what you need for WLAN) is only 1W. Another option is to buy an amplifier that is already on the market:
i just finished a 4 carriers 40 W power amplifier design, and this kind of digital predistorter is easily realized in the 800MHz, 900MHz, 1900mhz, 2140MHz wireless communication band, the DPD platform is the same and only need to change a part of device; the improvement of the linearity is 14dB,in chinese TD_SCDMA system, i use the analog PD techn
Two LNA in RFIC is designed to handle 900MHz and 1900mhz. To get low noise, there is no way to use cascade LNA in RFIC.
Dear, I want to build a PATCH_ antenna for my Wire Less Phone (CDMA) 1900mhz. I have no experience of RF/Antenna. Did any one build by self? please help. I have already seen some nice topics and infos on net. thanks Sadat
This coupler is dedicated mainly for PCS applications (1900mhz). At this frequency an important factor that will affect VSWR reading, is the layout and a proper terminations at each port of the coupler.
Usually the terminology for GSM and PCS refer to 900MHz band for GSM, and 1900mhz band for PCS. Frequency allocation for all GSM bands is: GSM850 – 824MHz to 894MHz (US) GSM900 – 880MHz to 960MHz (Europe, Asia) DCS1800 – 1710MHz to 1880MHz (Europe, Asia) PCS1900 – 1850MHz to 1990MHz (US)
i have ever seen triple band LNA in taiwan university(NTU) 900,1800,1900mhz
But, how can we start if we have choosen some common ISM band frequency in US (900MHz, 1900mhz, 2.4GHz and 5.8GHz) ? Are there limitation on the spacing between each turns? Any valuable advise!