All Questions
Tagged with transceiver rf
47
questions
0
votes
1
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50
views
Piezo tr switch no echo signal
I set this circuit to use piezo as transceiver. I can perfectly transfer the transmitter signal (10 burst pulse) but as transmitter still connected onto piezo , any reveived signal is disappears. When ...
- 39
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votes
1
answer
77
views
Match 50 ohm impedance to LNA input impedance
I have following PCB version of circuit: on SMA input we have antenna strictly matched to 50 ohm, then we have regular RF switch IC, after RF switch impedance matching network and final stage is ...
- 65
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votes
0
answers
84
views
Designing a circuit for wireless interrogation of a temperature SAW sensor
I'm currently working on a SAW-based temperature sensor. The gist of how it works is this: when the external temperature changes, the resonance frequency of the SAW resonator shifts. To detect the ...
- 113
1
vote
0
answers
51
views
Is it possible to use RF signal wires to let a model car center itself on it using phase differences?
I'm looking for a way to let a model car (1/24 to 1/18) know how centered it is on a road. I thought about using a buried wire in the middle of each lane of the road. Would it be possible to detect ...
- 11
1
vote
1
answer
161
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RF design_output impedance of the SX1280 LoRa transceiver
I searched the datasheet of the Semtech SX1280, but I can't find the output impedance of the SX1280 (RFIO's pin). Where can I find it?
- 11
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votes
1
answer
47
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How can I improve my 20m transceiver microphone amplifier?
After weeks (on and off admittedly) of debugging, I finally figured out why my homebrew 20m transceiver was oscillating on transmit.
Despite all attempts to improve grounding (I have a single copper ...
- 1,694
0
votes
1
answer
145
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AX5043 RF XCVR, problem making the automatic frequency control work in GMSK
I am working with the AX5043 RF transceiver from OnSemi.
I am using GMSK, and I am unable to make the automatic frequency control (AFC) work properly.
I am using a bitrate of 2400 bps. To be sure to ...
- 1
2
votes
2
answers
986
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What is the simplest 100km RF communication link there is?
I am looking for a technology for sending sporadic bytes over RF hundreds of kilometers away - assume line of sight. What should I look into to do that? What frequency? What modulation? Perhaps what ...
- 1,344
0
votes
1
answer
203
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Transceiver IC for radar
I'm trying to build a radar that functions in the ISM bands (433 MHz, 915 MHz, 2.4 GHz and 5.8 GHz). I'm trying to look for RF transceiver ICs that operate in these bands.
Most of the ICs I'm finding ...
1
vote
1
answer
319
views
433 MHz Transceiver - understanding OOK demodulator parameter 'OokFixedThreshold'
I would appreciate some help to understand a parameter for this device https://www.semtech.com/products/wireless-rf/fsk-transceivers/sx1231h. I'm far from an expert at RF matters and this question has ...
- 11
1
vote
1
answer
627
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What is the purpose of these components in an LC Balun?
I'm trying to understand an antenna impedance matching / balun network that I came across in the receiving signal path in the schematics for the STEVAL-FKI868V2 S2-LP Evaluation Board, shown in the ...
- 11
2
votes
1
answer
357
views
Sub 1 GHz communication - long range at 500kbps. Is my range estimate roughly correct?
When researching long range medium bitrate RF comms I came across the TI range. The TI CC1201 transceiver claims -97dBm sensitivity at 500-1000kbps. If the system is on the 868MHz band which is ...
- 608
0
votes
3
answers
1k
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How to decrease nrf24l01 transceiver range?
I've just got my Nrf24l01 but then I found out that the working signal range for the module is 100m and above. Our real intention for the module is to let the nrf24l01(Receiver) out of range for about ...
- 3
-1
votes
2
answers
139
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Half-duplex wireless: Is a tuned antenna more important for the transmitter or the receiver?
I intend for this to be a general/conceptual question that could apply to any wireless communication hardware, however I will use a specific example to talk about.
Let's consider the nRF24L01. (...
- 5,182
-1
votes
1
answer
36
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wirelessHD using with FPGA
I going to make a system to transfer data between 2 FPGAs wirelessly with high rate.
I found that wirelessHD method can do this, now what is the required hardware to establish such system?
