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  1. mrinalmani

    [SOLVED] Acceptable SNR for radio transceiver ICs

    Thanks for the replies. I am talking particularly about AX5043 which is a radio transceiver chip by ON Semiconductor intended to for <1GHz radio link. My frequency of interest is around 200MHz. (High frequency is being avoided because the signal must cross nearly 3 feet through water) The...
  2. mrinalmani

    [SOLVED] Acceptable SNR for radio transceiver ICs

    Hi! Radio transceiver ICs mention their receiver sensitivity and transmitter power level. Example -120db/20db. However they do not mention the acceptable SNR. My concern is that if I were to make use of LNA to increase the overall receiver sensitivity, then to what extent would the noise...
  3. mrinalmani

    Feed line for connecting SMA connector on PCB

    Thanks for the reply. I'll make the trace around 10mm in length. Also, is the tuning circuit ok?
  4. mrinalmani

    Feed line for connecting SMA connector on PCB

    Thanks for the reply! I am interfacing SIM-5360 module. I need to connect the antenna pin to SMA connector. The SMA connector is 50 ohms (datasheet). I am attaching a simple circuit. There is a tuning circuit between the antenna and the module pin. I have simply copied this tuning circuit from...
  5. mrinalmani

    Feed line for connecting SMA connector on PCB

    Hi! Please tell me how to connect the RF output pin of 800MHz RF IC to a SMA connector. Can I simply route the wires from the IC to the connector just like any other components or do I need to take some special care since this is a RF circuit. Does the length of connecting PCB trace have an...
  6. mrinalmani

    How to amplify transmission power of 2.4GHz signal

    Hi! Thanks a lot for the reply. As far as directional antenna goes, I dont have the slightest of knowledge of antenna design. It would be great is someone could assist me, but one big constraint is that the antenna must be small. The maximum available height inside the enclosure is just about...
  7. mrinalmani

    How to amplify transmission power of 2.4GHz signal

    The transceiver can either transmit or receive at one time. Perhaps something like NRF24L01 or similar.
  8. mrinalmani

    How to amplify transmission power of 2.4GHz signal

    Thanks for the reply! I found a few RF amplifiers that can amplify up to 30dB easily. But how to use these in case of a transceiver? Since the amplifiers will only amplify signal in one direction, how can the same amplifier be used for both transmission and reception? There is only one antenna...
  9. mrinalmani

    How to amplify transmission power of 2.4GHz signal

    Hi! I need to transmit a 2.4GHz signal through a distance of approx 30 feet. But it must pass through five concrete roofs. (Transmitting from the 4th floor to the ground floor of a building). Is a total of 100dB (emitter dB - receiver dB) ok for this? My emitter power is only 0dB, are there...
  10. mrinalmani

    PCB trace for carrying 24MHz clock signal

    Hi! My work is generally limited to power electronics and therefore I do not have much of experience with high frequency signal transmission. However, an application requires carrying 5 digital lines, from one portion of a 4-layer PCB to another portion. Length of traces will be approx 50mm...
  11. mrinalmani

    NRF24L01 not receiving data

    Hi! I am using two NRF24L01 chips for wireless communication. The transmitter chip is transmitting a single byte data, however the receiver is not being able to receive the data. Although the carrier detect flag on the receiver side goes high each time the transmitter transmits. I am not using...
  12. mrinalmani

    [SOLVED] RF diode vs standard diode

    I need to rectify frequency in the range of approx 100MHz. There are standard schottky diodes with around 1ns reverse recovery time. These are 'ok-ish' but I want to know if RF diodes are a better alternative. I looked at a few RF diode datasheets, but they dont specify the reverse recovery...
  13. mrinalmani

    Why we used Power factor

    1. Power factor = (real power)/(apparent power) 2. No advantage of power factor. 3 Transformer is a physical device while power factor is a mathematical ratio!
  14. mrinalmani

    Help need on Rectifier input frequency

    Normal fast recovery diodes will not work. Use Schottky barrier diodes (For frequencies upto 50GhZ)

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