Reflectionless transmission line filters, as well as a method for designing such filters is disclosed. These filters preferably function by absorbing the stop-band portion of the spectrum rather than reflecting it back to the source, which has significant advantages in many different applications. The insertion of additional transmission line sections that change the phase response of the circuit without altering the amplitude response preferably allows follow-up transmission line identities to be applied in order to arrive at a more easily manufacturable filter topology. This facilitates their application over a higher frequency range the solely lumped-element circuits.

A technique relates to a microwave device. The microwave device includes a Josephson ring modulator, a first multimode resonator connected to the Josephson ring modulator, where the first multimode resonator is made of a first left-handed transmission line, and a second multimode resonator connected to the Josephson ring modulator, where the second multimode resonator is made of a second left-handed transmission line.

A discrete field coupled capacitor with a cross-connected capacitor-pair, such as for use as a discrete bypass capacitor. The FCC includes a first port with first and second terminals, and a second port with third and fourth terminals. A first capacitor structure is connected between the first and second terminals, and a second capacitor structure connected between the third and fourth terminals. A cross-connect structure includes a first cross-connection to connect the first terminal to the third terminal, and a second cross-connection to connect the second terminal to the fourth terminal, to cross-connect the first and second capacitor structures. The capacitor structures have respective parasitic ESL, and can be disposed in proximity to effect a pre-defined ESL field coupling with reverse phasing to reduce parasitic ESL. The FCC can be constructed as a PCB or monolithic device. In a PCB four-layer construction, the cross-connections can be formed on respective mid-layers.

A common mode filter includes a substrate; an insulating layer disposed on the substrate and including coil patterns, the insulating layer having a cavity disposed in a central portion therein; and a magnetic particle-resin composite layer including a core part filling the cavity and a cover part covering the insulating layer. The core part contains fine magnetic particles having an average particle diameter of 30 m or less, and the cover part contains the fine magnetic particles having the average particle diameter of 30 m or less and coarse magnetic particles having an average particle diameter greater than that of the fine magnetic particles.

A common mode filter includes a substrate; an insulating layer disposed on the substrate and including coil patterns, the insulating layer having a cavity disposed in a central portion therein; and a magnetic particle-resin composite layer including a core part filling the cavity and a cover part covering the insulating layer. The core part contains fine magnetic particles having an average particle diameter of 30 m or less, and the cover part contains the fine magnetic particles having the average particle diameter of 30 m or less and coarse magnetic particles having an average particle diameter greater than that of the fine magnetic particles.

A wide band radio frequency (RF) circulator is presented. The RF circulator includes at least one stage having four ports, a first end, and a second end, wherein a first port and a third port are connected at the first end of the at least one stage, wherein a second port and a fourth port are connected at the second end of the at least one stage, wherein each of the at least one stage includes a pair of couplers connected through a first delay line and a second delay line, thereby forming a network of couplers in the at least one stage.

An exponentially-scaling switched impedance circuit includes: two or more impedance scaling circuits, wherein each impedance scaling circuit comprises: an input port; an output port; and a switched impedance circuit connected in parallel to the output port. Each impedance scaling circuit is configured to provide an effective impedance at the input port corresponding to a scaled-down version of the exponentially-scaling switched impedance circuit. The two or more impedance scaling circuits are connected in a cascade such that an input of an impedance scaling circuit is connected to an output of a previous impedance scaling circuit and/or an output of the impedance scaling circuit is connected to an input of a next impedance scaling circuit.

A structure of an integrated crystal oscillator package has a first quartz crystal resonator, a second quartz crystal resonator, and application-specific integrated circuit chip (ASIC) combined in a package. The ASIC has a switch control for receiving audio formats of 44.1 kHz and 48 kHz with different hi-fidelity (hi-fi). The first quartz crystal resonator has a first clock rate corresponding to the 44.1 kHz frequency and the second quartz crystal resonator has a second clock rate corresponding to the 48 kHz frequency to be switched by the present invention in operation.

Various examples are provided for enhanced guided surface waveguide probes, systems and methods. In one example, a guided surface waveguide probe includes a charge terminal comprising a upper terminal portion coupled to a lower terminal portion through a variable capacitance. In another example, a method includes positioning the charge terminal at a defined height over a lossy conducting medium; adjusting a phase delay () of a feed network connected to the charge a terminal to match a wave tilt angle () corresponding to a complex Brewster angle of incidence (.sub.i,B) associated with the lossy conducting medium; adjusting the variable capacitance based upon an image ground plane impedance (Z.sub.in) associated with the lossy conducting medium; and exciting the charge terminal with an excitation voltage via the feed network. The excitation voltage can establish an electric field that couples into a guided surface waveguide mode along a surface of the lossy conducting medium.

Data communication having improved electromagnetic interference (EMI) rejection when communicating through a coaxial cable is provided by using differential transmission and/or reception through a common-mode choke and a dissipative element resulting in extremely low radiated emissions and high immunity to external radiation interference in a low-cost way.