A waveguide rotary joint includes a first waveguide member comprising a first waveguide portion, and a second waveguide member comprising a second waveguide portion, the second waveguide member rotatably connected via a curved circumferential path to the first waveguide member, wherein the second waveguide portion is adjacent to the first waveguide portion to define a first split rectangular waveguide. A first waveguide input/output port is communicatively coupled to the first waveguide portion, and a second waveguide input/output port is communicatively coupled to the second waveguide portion. Relative rotation between the first waveguide member and the second waveguide member changes an angular length of the first waveguide connecting the first waveguide input/output port to the second waveguide input/output port.

In accordance with one or more embodiments, a directional coupler includes a first dielectric cable is configured to receive a first electromagnetic wave from the first port and to generate a second electromagnetic wave that propagates along a transmission medium in a first direction without requiring an electrical return path. A second dielectric cable is configured to couple a first portion of the second electromagnetic wave to a second port, wherein a second portion of the second electromagnetic wave continues to propagate in the first direction along the transmission medium. A third dielectric cable is configured to couple the second portion of the second electromagnetic wave to a third port and to isolate the third port from a third electromagnetic wave propagating along the transmission medium in a second direction that is opposite to the first direction.

A waveguide device is provided to absorb or dissipate electromagnetic waves. The device comprises an elongated housing having a first end that is a power receiving end and a second end, the housing defining a hollow passage. The device also has an elongated absorber element disposed within the hollow passage of the housing along an interior surface of the housing. The elongated absorber element is configured to absorb at least part of electromagnetic waves traveling through the hollow passage. The device also has a projection extending from the elongated housing into the passage. The projection is configured to exert a resilient force on the absorber element to urge the absorber element against the interior surface of the housing. A method for assembling the waveguide device is also provided.

A power sensor system, assembly and method for use as a power sensor standard in the 50 to 75 GHz frequency range. The power sensing system comprises a housing comprising a dual ridged waveguide impedance transformer, and a resistive component attachable to a back side of the housing. The resistive component comprises a terminating element electrically, but not thermally isolated from a sensing element. The sensing element operates at a constant resistance and is perpendicularly oriented to the terminating element.

According to an embodiment, an antenna includes a conductive antenna element, a voltage-bias conductor, and a polarization-compensation conductor. The conductive antenna element is configured to radiate a first signal having a first polarization, and the voltage-bias conductor is coupled to a side of the antenna element and is configured to radiate a second signal having a second polarization that is different from the first polarization. And the polarization-compensating conductor is coupled to an opposite side of the antenna element and is configured to radiate third a signal having a third polarization that is approximately the same as the second polarization and that destructively interferes with the second signal. Such an antenna can be configured to reduce cross-polarization of the signals that its antenna elements radiate.

A microwave heating device includes a variable frequency microwave power supply, a waveguide launcher, and a fixture to contain a material to be heated, with the fixture located directly adjacent to the end of the launcher. All heating occurs in the near-field region. This condition may be insured by keeping the thickness of the fixture or workpiece under one wavelength (at all microwave frequencies being used). The launcher is preferably a horn or waveguide configured to apply the microwave power to a small area to perform spot curing or repair operations involving adhesives and composites. The spot curing may secure components in place for further handling, after which a thermal or oven treatment will cure the remaining adhesive to develop adequate strength for service.

A related method is also disclosed.

A waveguide is provided. The waveguide comprises: a ridged waveguide section having a first end and an opposing second end, wherein the ridged waveguide section comprises an input port at the first end, and wherein the ridged waveguide section comprises at least one ridge formed within the ridged waveguide section extending into the ridged waveguide section along an axis normal to the input port; a rectangular waveguide section coupled to the second end; at least one tapered load element located in a non-ridge region of the ridged waveguide section, wherein the at least one tapered load element comprises a material configured to absorb a first portion of power propagating through the waveguide; and at least one lossy back load element within the rectangular waveguide section, wherein the at least one lossy back load element comprises a material configured to absorb a second portion of the power propagating through the waveguide.

A terminator has an upper dielectric layer provided on an upper broad wall of a post-wall waveguide, and a microstrip line (MSL) provided on the upper dielectric layer. A blind via has one end thereof connected with one end of the MSL and is inserted inside the post-wall waveguide. A chip resistor has one end thereof connected with the other end of the MSL and has the other end thereof connected with the upper broad wall.

A waveguide is provided. The waveguide comprises: a ridged waveguide section having a first end and an opposing second end, wherein the ridged waveguide section comprises an input port at the first end, and wherein the ridged waveguide section comprises at least one ridge formed within the ridged waveguide section extending into the ridged waveguide section along an axis normal to the input port; a rectangular waveguide section coupled to the second end; at least one tapered load element located in a non-ridge region of the ridged waveguide section, wherein the at least one tapered load element comprises a material configured to absorb a first portion of power propagating through the waveguide; and at least one lossy back load element within the rectangular waveguide section, wherein the at least one lossy back load element comprises a material configured to absorb a second portion of the power propagating through the waveguide.

A terminator has an upper dielectric layer provided on an upper broad wall of a post-wall waveguide, and a microstrip line (MSL) provided on the upper dielectric layer. A blind via has one end thereof connected with one end of the MSL and is inserted inside the post-wall waveguide. A chip resistor has one end thereof connected with the other end of the MSL and has the other end thereof connected with the upper broad wall.