In this case, the proposed antenna leads to an impedance match
over a wide frequency band.
The reasons are: a termination that can be well-approximated by a lumped circuit will be more easily impedance matched than a distributed counterpart; the lumped circuit permits ready determination of the ultimate limits on reflection and an optimum matching network topology; and a lumped termination, unlike its distributed counterpart, has a current distribution that is uniform over its length.
Given circuits such as those previously shown, several questions are immediately suggested: What is the ultimate limitation on how well they can be impedance matched (that is, with an infinite number of matching elements) over a given bandwidth?
Although the symmetrical arrangement of the bend pair preserves the differential phase shift, each bend also must he designed to have a good impedance match
and to control higher order mode generation.
Among his topics are phased array antennas, wideband impedance matching of a V-dipole antenna, lumped-element impedance matched
antennas, a circular waveguide antenna for a portable computer-based radar, a three-dimensional printed non-planar circular patch array antenna, and antenna and electromagnetic field measurements.
All BNC ports are impedance matched
to support 50 Ohm equipment.
--Category 6--ADC's TrueNet Category 6 patch panels, patch cords, and cable are impedance matched
to deliver extra bandwidth and better attenuation with zero bit errors.
Including all mechanical and electrical fixturing, the tester-specific interface uses impedance matched
connections to assure clear and accurate test signals between the tester and the DUT.
This means that the complete scattering of the antenna is primarily due to the structural mode if the feeding port is impedance matched. Usually, the frequency band of the low structural mode scattering does not coincide with the operating frequency band of the antenna, so the inband scattering of a conventional microstrip patch antenna can be even larger than the scattering in the outside band.
The antenna structure in terms of the patch size and dielectric constant of the substrate primarily determines this scattering characteristic, which changes little with feeding position if the antenna is impedance matched. The simulated S-parameters of the antenna are also given in Figure 2(a), which shows that the resonant frequency of the antenna is 4.319 GHz with edge center feeding.
Next, find a feeding position on the radiating patch at which the antenna impedance matches the feeding line.