coupling - What does an RF coupler actually do? - Electrical ...
2018年4月17日 · Above is a 3dB 75 Ohm splitter is also a DC-3 (meaning ideal 3db Directional Coupler , but actually 3.5) Depending on mutual coupling impedance, the coupler can be a -3dB tap ( - 0.5dB loss) down to a -50dB tap with low instertion loss. Also they can be equal power taps. This one can split 5kW at one frequency.
rf - How does this HF 'coupler' work? - Electrical Engineering Stack ...
2024年4月14日 · For those of us working in an engineering design position, we have to be careful about reviewing ham resources -- they often contain technical errors (like this coupler, arguably), they are often poorly measured (no data at all; sparse data; or data obtained under erroneous assumptions, e.g. antenna gain/pattern depends on unstated feedline ...
How reliable is using couplers to extend Ethernet cables?
2018年7月18日 · Oh, and in one place where I had to use a socket I've used tool-less Keystone below. It works flawlessly at 1G for many years now. I guess you can make your own coupler out of two sockets like that one. Or cut the plugs off one end of two 30m cables and replace them with sockets, effectively converting patch cable into extension cable. Note ...
high voltage - What types of bus couplers exist? - Electrical ...
2017年1月31日 · A bus coupler is just a normal circuit breaker (and isolators), no matter where it's installed, or which busses it's connecting. A "cross bus coupler" is just a bus coupler that happens to be connecting the two busses of a double-bus switchyard. It's not a different type of switchgear and shouldn't be classified as such.
Difference between RF splitter and coupler? - Electrical …
2011年5月9日 · It has an input, an output, a coupled port, and a load. It's a device that operates on an input so that two output signals are available, on the output port (larger signal) and the coupled port (smaller signal). However, when the input is applied to the opposite port of a terminated coupler, only one output signal is produced.
RF Directional Coupler - Electrical Engineering Stack Exchange
Directional coupler from here: - Coupling Loss - Amount of power lost to the coupled port (3) and to the isolated port (4). Assuming a reasonable directivity, the power transferred unintentionally to the isolated port will be negligible compared to that transferred intentionally to coupled port.
opto isolator - AC Optocoupler for 230V line detection - Electrical ...
2018年4月11日 · \$\begingroup\$ It was the chief engineers design, and he had to obey UL standards, so for 230-277 VAC it was 2 33K 3W resistors to keep about 3mA flowing into the opto-coupler. At 600VAC it was 2 47K 3W resistors.
rf - How do I terminate a directional coupler? - Electrical …
2019年1月8日 · The directional coupler linked above is matched to a 50ohm characteristic impedance. How do I terminate the isolation port to prevent reflections? Various sources online just say that I should terminate with the characteristic impedance, but is it sufficient to place a short microstrip at the isolated port and then via to a common ground plane?
wave - How does an swr meter directional coupler work?
Of course, there are also some reflections that happen at the discontinuities in this structure, so that the directional coupler can't have perfect directivity. Also, if you look up directional couplers on Wikipedia, you'll see there are numerous other types beyond the simplest one I've shown here, and various tricks to enable the coupled-line ...
Why use an opto-coupler? - Electrical Engineering Stack Exchange
2017年10月30日 · Maybe I have a misconception about the opto-couplers. But from my experience in dealing with electronic circuits, one of the main reasons for using an opto-coupler is to separate the high-frequency part of the circuit -which does the processing jobs- from its low frequency and power supply part (and I know about the role of capacitors.