Tan, "Experimental study on a flanged parallel-plate dielectric waveguide probe
for detection of buried inclusions," Progress In Electromagnetics Research, Vol.
In order to investigate the effect of the inside cavity pressure on the infrared reading, a D.M.E SS-405C pressure transducer was incorporated beside the waveguide probe
. Data acquisition for both infrared and pressure sensors was performed simultaneously at a frequency rate of 500 Hz so that rapid and sudden signal changes could be observed.
A new flexible waveguide probe permits simple and easy installations with the very minimum of headroom.
The technology involved uses a waveguide probe and measures the response time of an induced magnetic pulse that causes a torsional twist to the waveguide at liquid level.
The transverse magnetic field in the MUT region of Figure 1 is found by replacing the waveguide probe
apertures with equivalent magnetic surface currents [M.sub.1] and [M.sub.2] via Love's equivalence principle [31,32].
However, a WR-28 waveguide can be provided through the use of a waveguide probe
. The K-connector version's overall size is 1.02" X 0.93" X 0.5", excluding connectors, as shown in Figure 2.
Godshalk, "Waveguide Probe
Tackles V-Band On-Wafer Tests," Microwaves & RF, Oct., 1990.
The algorithm is also used for near-field to far-field transformation; two dimensional FFT with or without probe correction; the open-ended waveguide probe
model; far-field measured pattern files; and NIST calibration pattern files.
The taper is necessary to allow the center conductor to increase from the optimum diameter required at the sliding contact end up to the diameter required for the waveguide probe
. The dielectric support was made of Rexolite, which is easy to machine and contributes minimum losses at frequencies above 20 GHz.
Coplanar waveguide probes
, also referred to as coplanar probes, are the method of choice for launching RF signals on and off a wafer.
Commercial planar waveguide probes
, originally introduced as low frequency transitions, have extended in range to 75 GHz over a short time span. Recently, 100 GHz probe tips have been demonstrated. Considering the rapid evolution of CPW probes, it is likely to be only a matter of time before probe tips suitable for operation up to W-band become commercially available.
Contacting coplanar waveguide probes
, generally used to test MMICs, require special contact pads and via holes or large bypass capacitors for the microstrip ground connections.