A second directional coupler, positioned near the collector, receives an amplified version of the input signal from the far end of the RF circuit.
22.
The signal is normally fed into the helix via a waveguide or electromagnetic coil placed at one end, forming a one-way signal path, a directional coupler.
23.
It follows that the energy and momentum flux in this wave field only becomes significant at extremely short wavelengths where directional coupler technology is currently lacking.
24.
Directional couplers are most frequently constructed from two coupled transmission lines set close enough together such that energy passing through one is coupled to the other.
25.
To set up the modem, unplug the coaxial cable from the back of your television's cable converter box and plug it into the directional coupler's single jack.
26.
The term " hybrid coupler " originally applied to coupled line directional couplers, that is, directional couplers in which the two outputs are each half the input power.
27.
The term " hybrid coupler " originally applied to coupled line directional couplers, that is, directional couplers in which the two outputs are each half the input power.
28.
This main line is electromagnetically coupled to two smaller sense lines ( directional couplers ) which are terminated with resistors at one end, and diode rectifiers at the other.
29.
Simons had originally patented a directional coupler, U . S . Patent 3, 048, 798, filed December 24, 1959, that had defined this key component for cable-based distribution of television.
30.
While two port networks are very common ( e . g ., amplifiers and filters ), other electrical networks such as directional couplers and circulators have more than 2 ports.
