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Coaxial cable characteristic impedance isn't a resistance and can't be only measured with special instruments. To distinguish between 50 and 75 ohm cables, look at the ratio of center conductor to dielectric diameter. It's around 3 for 50 ohms versus 6 for 75 ohms.
Hi, For sure you can use a capacitance meter to measure each ones capacitance. But you will not know: rated voltage, dielectric material health status.. --> Its cheaper to buy new ones. Then mark the tape. Klaus
Hi, I need to develop a sensor based on changes of surrounding dielectric media at 100MHz. Sensor needs to be a PCB probe for low cost easy implementation. Exploring antenna or capacitance proprieties at 100MHz from pcb strips or some pcb design. Source inject 100MHz and need to measure reflected signal with detector. See pictures of ideia con
Hi, you'll have to measure them. If the caps are ceramic type, probably there's nothing written on them. Using the dielectric color you could guess the capacitance range, but this is not reliable since there's no standard for that. What I would do is to take out each one of the caps and measure with the LCR meter.
Here is my understanding: - physical oxide thickness is the real thickness of the gate dielectric layer, that you can measure with a ruler on TEM vertical cross-section. - effective or electrical oxide thickness is the thickness of SiO2 layer that would produce the same capacitance (per unit area) as the given technology. There are several reason
Metallic losses have second order effects on the attenuation.Tand D has a dominant on the overall attenuation. Question : How the manufacturer measured Tand D ?? Did they measure it or they're talking with dielectric manufacturers' claims and lot ( manufacturing ) reports ??? If everything is same, the results must be same as before. Did (...)
For example, some 0.5mm ceramic piece can give nice signal improvement if glued above DC decoupling gaps. I have doubts about how it works. Because sometimes covering part of gap gives better result, so maybe it alters impedancea a bit and works as matching? For example, if we currently somewhere on a Smith chart, where small changes in line length
Your suggestion may work, but it is far simpler to have an electrode pair immersed in each tank in close proximity to make each pair a capacitor. Then use a constant current source at some f to measure V proportional to depth. Then using the properties of water with a dielectric constant of ~60 you can measure capacitance or impedance at (...)
are you looking for part number of this connector, or searching if this connector really work at 26Ghz ? if the second, you can measure the size of pin and dielectric of this conn, so in cst, obtain the cut off freq.
Hi, if there is a fixed dielectric constant then id use a capacitive sensor. a mechanical solution can be to push the paper between two ball bearings and measure the distance.. optical: light shine through it depends on some parameters wich solution to choose. Klaus
If the patch include (slot or in the case of patch array), how to measure effective dielectric constant in FEKO can I calculate it from request (near field)? with thanks.
A water level meter usually utilizes water resistance as most kinds of drinkable water is contaminated with salts making water conductive. Using a capacitance to measure water level is possible if the water is distilled and deionized. You can try both by making a pair of sensor electrodes from stainless steel in a dielectric holder. The electrodes
Hello sir Please let me know about how to measure pemitivity of the dielectric material like wax plastic etc for capacitor designed in home with plastic box etc etc etc
There are many methods to measure material permittivity at RF and microwaves. You can use capacitive sensors as well as microstrip lines, resonators and other devices. Check "" and "" for white papers and methods. Maybe I can help if you indicate what is your frequency of interest and material type. In general, the "
I would like to measure power absorbed into a lossy dielectric illuminated by a UWB pulse-excited antenna vs a lumped port excited antenna. Is it possible to simulate a UWB antenna in HFSS with a pulse (or Gaussian Beam) excitation? Say I have a UWB microstrip antenna that was designed using a waveport. Now I would like to excite i
The source is unreliable. consider another source for wav files... Connect any differential Op Amp ( 3stage) or better any Instrument Amplifier chip with gain of 1000. and measure your own ECG signals. Or ask the Cardiology or Heart research foundation from some source to provide medical test signals. Use a suitable dielectric on the probes to prev
In any medium where a dielectric is present, the effective wavelength is shorter than that in vacuum by a reverse square root of the real part of permittivity. It hold also for waveguides. If you can measure the wavelength in a waveguide with a dielectric filling, then you can calculate the real part of its permittivity knowing the (...)
PCB dielectric Coefficient for FR4 is not constant by frequency so that the manufacturers give this coeffcient for certain frequency,temperature and relative humidity.Therefore the dielectric coeffcient which you used to calculate characteristic impedance for PCB traces migh not be correct. In additional to, if the operating fequency is sufficientl
many coax dielectric constants yield propagation speed c ≈ 2e8 m/s now L=c/f choose L/2 and L/4 for a given wavelength, L. and make it long than necessary by 10% so you can tune it. using a NA you can measure return loss of stub if just using it as 1 port device. Of course you know quarter wave cables will transfer the inv
thank you, Do you have any example that contain resonator with a coupled device? (e.g. a resonator coupled by guide line) thanks in advance One of nice applications is in a microwave oscillator. If you open a satellite low-noise block down converter, you will see how the dielectric resonator is coupled to a micr