Resonant antennas are expected to be used around a particular " matching network while maintaining the other characteristics ( except for a possible loss of efficiency ).
22.
The " antenna feed " may refer to all components connecting the antenna to the transmitter or receiver, such as an impedance matching network in addition to the transmission line.
23.
Antennas based on the dipole ( rather than vertical antennas ) should include a balun in between the transmission line and antenna element, which may be integrated into any such matching network.
24.
For example, the usual passive Foster impedance matching networks can only match the impedance of an antenna with a transmission line at discrete frequencies, which limits the bandwidth of the antenna.
25.
In addition, CaliforniaVolunteers developed and maintains the largest online statewide volunteer matching network in the nation on CaliforniaVolunteers . org, and guides policy development to support the nonprofit and service fields.
26.
Here the signal enters and then passes through a transformer, along with a varactor and related components and forms an electrically-tuned filter / matching network, the 2 meter preamplifier.
27.
Not being close to 3 / 2 wavelengths, this antenna's impedance has a large ( negative ) reactance and can only be used with an impedance matching network ( or " antenna tuner " ).
28.
This is most efficiently accomplished using a matching network at the site of the antenna, since simply adjusting a matching network at the transmitter ( or receiver ) would leave the transmission line with a poor standing wave ratio.
29.
This is most efficiently accomplished using a matching network at the site of the antenna, since simply adjusting a matching network at the transmitter ( or receiver ) would leave the transmission line with a poor standing wave ratio.
30.
More commonly, the impedance is adjusted at the load ( see below ) with an antenna tuner, a balun, a matching transformer, matching networks composed of inductors and capacitors, or matching sections such as the gamma match.
