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Does someone has an exemplary layout or idea for a compact mute switch?
One state low insertion loss and the other one for example a 30 dB rejection.
Best regards
Ferroelectrics (BST-based) are claimed for tunable components in microwave: tunable filters, tunable phase shifters, tunable antennas, etc.
Here some related links:
http://www.paratek.com/
http://www.agilematerials.com/
**broken link removed**
If you have more detailed questions, feel...
Ferroelectrics (BST-based) are claimed for tunable components in microwave: tunable filters, tunable phase shifters, tunable antennas, etc.
Here some related links:
http://www.paratek.com/
http://www.agilematerials.com/
**broken link removed**
If you have more detailed questions, feel free...
SAW filters are used today in mobile phones as RF preselection filters. Immediately after the antenna and switches, but before LNA. The goal is to preselect the system band and to improve blocking performance of the receiver. IF SAW filters are no more used, particularly in GSM cellular phones...
how can I quickly test, if I have a low-IF RF chip transmitter or a direct upconversion. It is a 2.4/5 GHz Wlan with differential IQ input ports in baseband.
I want to add that in GSM (half-duplex transmission) only a low pass filter is set after PA for harmonics suppresion. This could be realized by discrete components with low insertion loss (~0.5 dB). GSM RX-SAW has insertion loss > 2 dB.
Re: Why IP3 of LNA?
In the cellphone area, you can see it very well. (W-)CDMA, which are full-duplex standards, requires considerable more linear LNA than EDGE/GSM phones. Reason is because your own transmit signal acts as a strong blocker at your LNA.
Hi vfone,
first of all thanks for your reply.
Yes, all what you say is clear for me.
But my problem is that one guy have told me, that for example if we take the Rx part of a duplexer. it rejects around 55 dB your own Tx signal. But if you take this part and used it as a "stand-alone" Rx...
In PCS-CDMA normally a duplexer (SAW, FBAR, ceramic) is used in mobile phones. But for example if you separate Tx and Rx antennas (or feed points) or even you have an additional Rx diversity path, single filters are required which take over the Tx-Rx-isolation functionality. But I heard that if...
I have surfed through the www.
I have read some interesting things about "Radio Free Intel",
It´s a kind of software defined radio for wireless devices.
Here is an interesting abstract:
"... the Labs are also looking into techniques that do most of their filtering in the phase-rather than the...
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