The dual-orthogonal linear polarizations are generated by an L-shaped coupling probe
and an H-shaped coupling aperture.
It does not require any complex feeding structure and uses only a coaxial feed extended with a simple electric field coupling probe.
The input is a coaxial feed extended with a simple electric field coupling probe.
Referring to the figure, the single electric field coupling probe is fed along the y-axis and is of Type A .
The electric field coupling probe is approximately [lambda]g / 4 from the short circuit wall and it is used to excite the waveguide modes.
Microwave energy was introduced to the cavity through a coupling probe .
The cavity length and the coupling probe length were tunable.
By tuning the cavity length and the coupling probe length, the resonant mode [TE.
x-1])) of the linear array coupling probes in the waveguide obey Equation 4 ( see Figure 7), then this array provides the required side lobe levels of -28 dB.
The antenna tests have demonstrated high agreement between measured and calculated values of propagation constant in partially dielectric-filled waveguides and coupling probes (the measured deviation angle of the beam coincide exactly with the calculated one), SWR, gain and pattern parameters.
The coaxial probe coupling method uses coaxial coupling probes
over microstrip, coplanar or waveguide coupling structures, and provides a method for evaluating structures similar to actual microwave circuit applications.
In the case of longitudinal oscillations on the conducting strip, depending on the strip length and the number of standing half waves, it is possible that a voltage zero might appear directly underneath one or both of the coupling probes