Questions tagged [wireless]
Using other than a wired connection to transfer signals or power. Includes optical and (ultra)sound, but most often refers to RF (Radio Frequency). Distances can be as low as centimeters (e.g. RFID); there's no upper limit.
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Does it really matter to interchange transmitter and receiver in a transceiver module, where one module is more powerful than other?
I have this and this module (one piece each), which I will be using to automatically turn on and off my water pump (which is installed in the basement, inside my house) by sensing the water level of ...
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Unexpected Noise Floor Behavior on S2LP Receiver – Need Help Understanding
I’m currently developing a handheld device using the S2LP as an RF transceiver, and I’ve run into something I can’t quite explain about the noise floor during receive mode.
Here’s the noise floor the ...
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RF bandpass filter design
Not being a filter designer and using ADS to simulate an RF bandpass elliptic filter in a line up, my question is : If I wanted to have a certain filter rejection a a certain frequency which is very ...
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TI Wireless range estimation Tool Clarifications for Sub-1 GHz
I am using TI Wireless range estimation tool for for calculating the Range of CC1352P7 evaluation board for Sub-1 GHz communication. Below is the snippet from the tool.
I have couple of questions ...
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Class AB Power amplifier
When designing a class AB power amplifier for an OFDM signal, which has a high peak to average power ratio, can I in general assume that tuning for maximum saturated output power is the goal to be ...
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Where should I connect my VNA for impedance matching on a wireless module?
I’m new to RF design and need some guidance. My board has a wireless module where the ANT output goes through a matching network and then to a U.FL connector, which connects to the antenna. This chip ...
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Multitech xDot ABP not working after factory reset [closed]
I've recently been working with Multitech's MTXDOT A00-1 LoraWAN modules along with my RAKWireless WisGate Edge Lite 2 And I've noticed an issue with Multitech's modules: The modules connect to the ...
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Can MIMO function properly if RF radios are connected to an RF transceiver via coaxial cables?
My team is developing a simulator to test how degraded RF network conditions affect our Silvus MANET radios. We have a JFW RF Transceiver which acts as a sort of hub, and allows us to connect each ...
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Why do some car key fobs use two frequencies?
Im trying to understand key fobs a bit better and to my knowledge there are systems which utilize 2 frequencies (LF and UHF) https://en.wikipedia.org/wiki/Smart_key#Keyless_Go. The key fob receives ...
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Simulating in Matlab the impact of group delay variation over a certain Bandwidth
I have been trying to simulate in terms of EVM the impact of group delay variation on a signal. So I start in the frequency domain to create a shape which represents the amount of group delay ...
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Sub 1GHz communication with Rosenbauer Connected Command terminal
I am working on an IoT project in which couple of gas sensors will be connected to TI CC1352P. This is the "CC1352P1 LaunchPad" evaluation board we are going to purchase for POC.
Let me give ...
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Reduction in RSSI from wearable RF device and Human Shadowing [closed]
For a wearable device how should I determine reduced signal strength based on the body position? Is there an established best path to do this?
I need to select a frequency for transmission and a ...
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Fractional PLL, do they really deserve the PLL nomination?
Contrary to an integer PLL, a fractional PLL does not really lock to the phase of the reference upon switching frequencies, i.e. it locks rather to the reference frequency (and not the phase) through ...
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Stop Electric Motor (No Wireless Communication Nor SW Hacking) Wirelessly (Electromagnetic)? [closed]
I googled a bit and it looks like (only way) stopping electic motor (alternating current motor) shutting down/shorting the power line on the board. I am looking for stop it wirelessly. I noticed that ...
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Battery capacity calculation for wireless sensor
I have a sensor which draws 20mA for 20ms and draws sleep current of 40uA during rest(sleep period) of the period. The period will be 5 min. I want to calculate the capacity of the battery which will ...
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