Questions tagged [coaxial]

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What would you call a cable which combines both a coaxial transmission line and regular conductors?

I'm looking for a cable that can carry both dual supply (+5V and -5V at <100mA) DC power and a relatively high bandwidth analog signal. The intended application is powering the amplifier of an ...
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0answers
27 views

Twinax to Coax adapter

I'm being provided analog video over a twinax cable and I need to be able to feed it into a PC capture card for an at home hobby. Problem I'm encountering is most capture cards down take twinax. Has ...
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5answers
3k views

How are unbalanced coaxial cables used for broadcasting TV signals without any problems?

As far as I know, in telephony STP or twisted pair cables are used. This creates balanced line impedances which is useful to mitigate for common mode related interference. So using balanced cables in ...
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1answer
56 views

Ultra Miniature Coaxial connector what does 50ohm stand for

In my current project I designed a PCB board for the ESP8266EX chip. Instead of making an onboard antenna, like in the datasheet described, I have placed this connecter. The goal is to be able to ...
6
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3answers
107 views

Can two 802.11n devices communicate via a coaxial cable?

Coaxial cables with RP-SMA connectors are often used as extensions for external antennas / with software defined radios. What would happen if I were to connect two access points (wifi chips, via ...
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2answers
129 views

LC Filter Design with coaxial input and output

I was trying to design a Chebychev high pass filter of 400MHz corner bandwidth, 0.2db ripple and 5 poles. I am confused with the proposed design in this filter design calculator. This calculator asks ...
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0answers
32 views

Permittivity measurement using open-ended coaxial probe

I am trying to understand how the complex permittivity of liquids can be measured using an open-ended coaxial probe. For this kind of measurement, we put a open-ended coaxial line into the liquid ...
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2answers
41 views

Rogowski coil current rating

Is there any relationship between sensitivity of rogowski coil and voltage rating of coaxial cable with it. For example if I just have the sensitivity of the coil and spec of coaxial cable, is there a ...
1
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1answer
89 views

why is it bad if a coax cable (used for antenna cable) has multiple paths to ground?

I have an Internet modem/router device connected to a 20 foot LMR400 coaxial cable which uses N-to-N type connectors to connect to a 10 foot LMR400 cable, which is then connected into an ...
7
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1answer
543 views

Why did CATV standarize in 75 ohms and everyone else in 50?

All of the CATV industry runs on 75 ohm systems, while most of the rest of the radio world uses 50 ohms. Why was this standard chosen? I was wondering this because good quality RG6 cable can be ...