Impedance matching Definition and 58 Threads

Hi, I'm having a little trouble understanding the concept of impedance matching to maximise energy transfer. I understand that the reactance of a capacitor is X_c= \frac{1}{\omega C } and that it is always 90 degrees lagging of the current in the complex plane which leads to a capacitors...

A friend of mine is having problems with a measurement signal he is getting from a Rogowski coil. When he changes the coaxial cable length the amplitude of the signal changes. It’s been a while since I’ve studied this type of thing but to me it sounded like an impedance mismatch issue and...

Hi. I need to connect an antenna to a BPF (Band Pass Filter) and this one to a transceiver. The BPF purpose isn't to make matching, is to filter the input/output signals to the desired bandwidth. I'm a little confuse and would like you to confirm my ideas, to help I made a sketch...

Our professor gave us some homework and one of the problem statements reads: "Design an impedance matching network used to connect a 300 Ohm transmission line to a 50 Ohm transmission line." Is this as simple as Zmatch = Sqrt(Z1*Z2) ? I'm wondering if there's something I'm missing...

Hi all, I'm currently studying up on transmission lines for my next midterm, and I stumble onto this problem. Given information: A 800 MHz transmission line that is lossless - Vmax, Vmin, V_L for a given load impedance R_L. - Characteristic impedance of a line - length of a line & \lambda...

Ok, need some help with the end part of this, here's the problem... The relation between the impedance Z and the refractive index n of a dielectric is given by Z=1/n. Light traveling in free space enters a glass lens which has a refractive index of 1.5 for free space wavelength of 5.5E-7 m...

Hi, I have a few 50 ohm loop antennas tuned to resonate at 13.56 MHz. (inductive RFID antenna). I would like to test one antenna´s influence on the other, so I think one approach is to connect one antenna directly to a signal generator. Do I have to design any matching circuit between the...

if i want to connect a comparator chip's output (TTL) to Spartan2 FPGA board, can i directly do it, do i need to consider the impedance match? when i directly connect them, I will see the transition on the edge of the waveform stored (after FPGA processing, i save the output of FPGA and plot on...