A contactless radio frequency (RF) probe with inverted microstrip lines. The RF probe includes a microstrip associated with a device under test, and a broadside coupled inverted microstrip line configured to exchange RF signals to a network analyzer.

Disclosed are various embodiments for transmitting energy conveyed in the form of a guided surface-waveguide mode along a lossy conducting medium such as, e.g., the surface of a terrestrial medium by exciting a polyphase waveguide probe. A probe control system can be used to adjust the polyphase waveguide probe based at least in part upon characteristics of the lossy conducting medium.

Disclosed are various embodiments for transmitting energy conveyed in the form of a guided surface-waveguide mode along a lossy conducting medium such as, e.g., the surface of a terrestrial medium by exciting a polyphase waveguide probe. A probe control system can be used to adjust the polyphase waveguide probe based at least in part upon characteristics of the lossy conducting medium.

Disclosed are various systems and methods for remote surface sensing using guided surface wave modes on lossy media. One system, among others, includes a guided surface waveguide probe configured to launch a guided surface wave along a surface of a lossy conducting medium, and a receiver configured to receive backscatter reflected by a remotely located object illuminated by the guided surface wave. One method, among others, includes launching a guided surface wave along a surface of a lossy conducting medium by exciting a charge terminal of a guided surface waveguide probe, and receiving backscatter reflected by a remotely located object illuminated by the guided surface wave.

Disclosed are various systems and methods for remote surface sensing using guided surface wave modes on lossy media. One system, among others, includes a guided surface waveguide probe configured to launch a guided surface wave along a surface of a lossy conducting medium, and a receiver configured to receive backscatter reflected by a remotely located object illuminated by the guided surface wave. One method, among others, includes launching a guided surface wave along a surface of a lossy conducting medium by exciting a charge terminal of a guided surface waveguide probe, and receiving backscatter reflected by a remotely located object illuminated by the guided surface wave.

Aspects of the subject disclosure may include, a system that obtains a group of signals that are each representative of a corresponding one of a group of electromagnetic waves, analyzes the group of signals to determine signal characteristics, and determines, according to the signal characteristics, predicted characteristics for a communication signal that is to be transmitted by a circuit. Other embodiments are disclosed.

A filtering device and a coupling structure for cavity filters are provided. The coupling structure includes a first coupling rod, both ends of the first coupling rod being coupled to two adjacent cavity filters, respectively, and a second coupling rod, the second coupling rod being cross-coupled to the first coupling rod, and both ends of the second coupling rod being grounded, so that a resonant frequency of the coupling structure is greater than a resonant frequency of the first coupling rod.

A filtering device and a coupling structure for cavity filters are provided. The coupling structure includes a first coupling rod, both ends of the first coupling rod being coupled to two adjacent cavity filters, respectively, and a second coupling rod, the second coupling rod being cross-coupled to the first coupling rod, and both ends of the second coupling rod being grounded, so that a resonant frequency of the coupling structure is greater than a resonant frequency of the first coupling rod.

Disclosed are various systems and methods directed to the launching of a guided surface wave embodying a modulated signal using a guided surface waveguide probe. A modulated signal is generated and coupled to a guided surface waveguide probe. A resulting guided surface wave is launched that decays exponentially as a function of distance.

Disclosed are various systems and methods directed to the launching of a guided surface wave embodying a modulated signal using a guided surface waveguide probe. A modulated signal is generated and coupled to a guided surface waveguide probe. A resulting guided surface wave is launched that decays exponentially as a function of distance.