Diplexers and Duplexers

Question I started with

Rather than memorize the whole transceiver, I isolated the inputs, outputs, and role of Diplexers and Duplexers.

Diplexers and Duplexers — concept flow — I redrew the relationships before returning to the equations.

Connecting the concepts

The key is sharing a port through frequency-selective branches while checking isolation and power handling. Frequency, impedance, gain/loss, noise, and linearity at both sides are recorded before connecting the block.

Diplexers
RF block
S-parameter
signal chain

Equations and assumptions

I write the reference impedance, units, and linear-versus-decibel domain before substituting numbers.

Isolation_dB = -20 log10(abs(S_leak))P_loss = P_in(1 - eta)

Worked example

If |Sleak|=0.01, isolation is 40 dB.

Diplexers and Duplexers — calculation relationship — This is my explanatory redraw, not an imported RFDH figure or a measurement result.

Connecting it to my coursework and projects

I connect this block to my passive-network coursework and FMCW transceiver flow. The example is a recomputed study value, not a hardware measurement.

High-frequency engineering course hub

What I will check next

I do not mix typical, guaranteed, and simulated conditions or directly compare values taken at different frequency, bias, temperature, power, or terminations.

Pages I read

RFDH: Diplexer·Duplexer