Bi-directional, compact, multi-path and free space channel replicator

An apparatus for simulating radio frequency (RF) signal propagation characteristics in a wireless communication network, comprising:

• a first RF terminal;
• a second RF terminal;
• a first optical modulator in electrical communication with the first RF terminal, the first optical modulator configured to transmit a first wavelength;
• an optical delay line in optical communication with the first optical modulator;
• a first optical demodulator in optical communication with the optical delay line and in electrical communication with the first RF terminal;
• a second optical demodulator in optical communication with the optical delay line and in electrical communication with the second RF terminal;
• a second optical modulator in electrical communication with the second RF terminal and in optical communication with the optical delay line, the second optical modulator configured to transmit a second wavelength;
• a first optical filter in optical communication with the optical delay line and the first optical demodulator, the first optical filter configured to transmit the second wavelength;
• and
• a second optical filter in optical communication with the optical delay line and the second optical demodulator, the second optical filter configured to transmit the first wavelength.