Questions tagged [coax]
Coaxial cable, or coax, is a type of cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield.
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Coax DTF Frequency Span
Hopefully, we have some RF transmission train drivers on board. My question pertains to what start and stop frequencies to use when making coax Distance-to-Fault (DTF) measurements on a VNA like an ...
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Driving 50 Ω coax cable for doing measurements with oscilloscope
This is a follow up question to Using 50 Ω coax cable instead of passive probe.
In the linked question I asked whether it would be possible to use a 50 Ω coax cable instead of the passive probe for ...
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Correct connection of a Wi-Fi board having both printed antennas and U.FL sockets
An RF part of a dual antenna Wi-Fi module from Aliexpress.
We can see coax sockets connected in parallel to printed antennas. Two external antennas and corresponding pigtails are part of the package.
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In cable TV, what prevents an user added channel from propagating downstream?
A cable TV user can use an RF modulator and a coaxial splitter/combiner to add a video signal, in an unused channel, to the coaxial cables running in their home.
What prevents this new channel to ...
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Coax cables and input impedances
I'm doing a voltage measurement with the help of an Active Differential Probe (TESTEC TT-SI 9010) with an output voltage of +-7V. This voltages have rise times of the order 500ns.
The set up looks ...
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Shielding WiFi signal
I have a device with WiFi connectivity. I want to shield this device from the outside, so no one can connect with the device, no matter how near he stands to it.
My device has a small antenna which ...
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My sourcemeter lets me do a four probe connection using banana connectors or tri-ax. What do the extra lines on the tri-ax do?
The Keithley 2450 sourcemeter has two ways you can do a 4-probe measurement: in the front there are four banana connection ports labeled SENSE HI, SENSE LO,FORCE HI, and FORCE LO. In the back, there ...
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RCA coax end termination
I am building an amplifier that takes in an RCA output from a TV. From my general understanding, RCA coaxial cables typically have an impedance of either 50 Ω or 75 Ω and a small amount of capacitance ...
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Why aren't baluns needed for a monopole to unbalanced coax connection?
I've asked before regarding dipoles connected to unbalanced lines. From what I gathered, the current in the inner shield when reaching the dipole (in transmitting case) can either go into the pole ...
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AC leakage issue with high impedance measurement setup
I am having an AC leakage current problem with my measurement setup that I typically use for lock-in measurements.
I employ a 100 M\$\Omega\$ resistor as a voltage-current converter, and in series, a ...
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Coaxial quality and frequency rating
Context
I aim to start playing with RF and the first thing I wish to do is some EMI tests.
I've been watching YouTube videos on the matter as you do, and I've seen plenty of people using SMA ...
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Is propagation delay in coax cable a function of signal frequency?
For this coax cable, the propagation delay is given as a single parameter in 1.54 ns/ft as follows:
But isn't the propagation delay function of signal frequency?
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Directional coupler frequency range
If a directional coupler is labeled 5-1002 Mhz, what happens to frequencies above that? Is that just the rated frequencies but above that may work fine, or does that mean it blocks everything above ...
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Ansys AEDT and Icepak Simulation
I have designed slotted coax cable based waveguide and FR4 is not getting any heat and even the coaxial cable does not get any heat which I do not understand why. E field as follows, ports include 2kW ...
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What are these PCB coax holders called?
I have RG6 coax which I need to attach to a board and would like
to use a strain relief method as shown here:
What are these connector "claw grip" things called?
I believe this "claw ...
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