Radio frequency probe including a dielectric waveguide and a conducting transition member having an end portion with associated prongs
Radio frequency (RF) probes are shown and disclosed. In some embodiments, the RF probe includes a dielectric waveguide having opposed first and second longitudinal end portions and a planar conducting ground member being received in the first end portion of the dielectric waveguide. The conducting ground member includes an end portion with at least a first prong. The probe assembly additionally includes a conducting transition member received in the first end portion of the dielectric waveguide and spaced from the planar conducting ground member. The conducting transition member includes an end portion that includes a second prong spaced from the first prong.
1 . A radio frequency (RF) probe, comprising:
a dielectric waveguide having opposed first and second longitudinal end portions;
a planar conducting ground member being received in the first end portion of the dielectric waveguide, the conducting ground member having an end portion with at least a first prong; and
a conducting transition member received in the first end portion of the dielectric waveguide and spaced from the planar conducting ground member, the conducting transition member having an end portion that includes a second prong spaced from the first prong.
2 . The RF probe of claim 1 , wherein the end portion of the conducting ground member includes the first prong and a third prong spaced from the first prong defining a gap therebetween.
3 . The RF probe of claim 2 , wherein the second prong is disposed within the gap between first and third prongs, the second prong being spaced from the first prong and from the second prong.
4 . The RF probe of claim 3 further comprising a first finger attached to, or formed with, the first prong, a second finger attached to, or formed with, the second prong, and a third finger attached to, or formed with, the third prong, the first, second, and third fingers being external to the dielectric waveguide.
5 . The RF probe of claim 1 , wherein the dielectric wave guide includes opposed top and bottom surfaces and further comprising a first conductive layer attached to the bottom surface of the dielectric waveguide and contacting the conducting ground member.
6 . The RF probe of claim 5 , further comprising a second conductive layer attached to the top surface of the dielectric waveguide and contacting the conducting transition member.
7 . The RF probe of claim 1 , further comprising a dielectric spacer attached to one or more surfaces of the dielectric waveguide, the dielectric spacer being made of one or more materials different from the dielectric waveguide.
8 . The RF probe of claim 7 , further comprising a conductive shield attached to a surface of the dielectric spacer opposed from the dielectric waveguide.
9 . The RF probe of claim 8 , further comprising a conductive layer attached to a surface of the dielectric waveguide that does not include the dielectric spacer.
10 . The RF probe of claim 9 , further comprising at least one via in the dielectric spacer to electrically connect the conductive shield to the conducting transition member.
11 . The RF probe of claim 1 , wherein the conducting transition member is planar and wherein the conducting ground member is in a first plane and the conducting transition member is in a second plane that is perpendicular to the first plane.
12 . The RF probe of claim 1 , wherein the conducting transition member is one of a metal plate or a conducting wire.
13 . The RF probe of claim 1 , wherein the dielectric waveguide includes a dielectric core with a first outer dielectric attached to one side of the dielectric core and a second outer dielectric attached to the opposite side of the dielectric core, the first and second outer dielectrics being made of one or more materials different from the dielectric core.
14 . The RF probe of claim 1 , further comprising a hollow metal waveguide, wherein second end portion of the dielectric waveguide is received in the metal waveguide.
15 . The RF probe of claim 14 , further comprising a conductive layer attached to a bottom surface of the dielectric waveguide, the conductive layer extending between the metal waveguide and the conducting ground member, the conductive layer contacting both the metal waveguide and the conducting ground member.
16 . The RF probe of claim 15 , wherein the second end portion of the dielectric waveguide tapers along one or more sides as the second end portion extends into the metal waveguide.
17 . The RF probe of claim 16 , wherein the second end portion has the shape of a triangular prism.
18 . The RF probe of claim 16 , wherein the second end portion has the shape of two or more adjacent rectangular prisms having heights that decrease as the first end portion extends into the metal waveguide.
19 . A radio frequency (RF) probe, comprising:
a dielectric waveguide having opposed first and second longitudinal end portions, the second end portion of the dielectric waveguide being received in a metal waveguide;
a planar conducting ground member being received in the first end portion of the dielectric waveguide, the conducting ground member having an end portion with first and second prongs that are spaced from each other defining a gap therebetween; and
a conducting transition member received in the first end portion of the dielectric waveguide and spaced from the planar conducting ground member, the conducting transition member having an end portion that includes a third prong that is disposed within the gap between first and second prongs, the third prong being spaced from the first and second prongs.
20 . The RF probe of claim 19 , wherein the first end portion of the dielectric waveguide tapers along one or more sides as the second end portion extends into the metal waveguide.