A device is disclosed that includes a transmission plate, a conductive plate, and a capacitive unit. The transmission plate includes a winding structure and is configured to be electrically coupled between an input source and a load. The conductive plate is configured to be electrically coupled to ground. The capacitive unit is electrically coupled between the conductive plate and the transmission plate.

A coaxial radio frequency (RF) isolator is disclosed. The isolator includes a first connector that conducts an RF signal received from a first device connected to the isolator. The isolator also includes a conductive body including a second connector and a conductive outer shield that form a first internal cavity. The isolator further includes a dielectric sleeve between the outer shield and the conductive body. In addition, the isolator includes a conductive coupling/filtering member inside the outer shield and the dielectric sleeve. The conductive coupling/filtering member has a cylindrical shape forming a second internal cavity. Moreover, the isolator includes a thru-RF signal transmission path through the first internal cavity and the second internal cavity. The thru-RF signal transmission path receives the RF signal from the first device, conditions the RF signal, and outputs the RF signal to a second device. Further, the isolator includes a coaxial coupling element in the first internal cavity and has a cylindrical shape. The coaxial coupling element connects the conductive body, the conductive filtering/coupling member, and the conductive outer shield. Additionally, the isolator includes a magnetic toroid in the first cavity that surrounds the conductive coupling/filtering member.

Embodiments of a broadband capacitor in a coaxial line are described. A capacitor may be realized in the center conductor of the coaxial line, and this aspect has two different embodiments. One embodiment forms the capacitor between the flat faces of an interrupted inner conductor structure. A second embodiment forms the capacitor between overlapping fingers of the female inner conductor and the male inner conductor, where the fingers can be realized in different ways. In another embodiment, a capacitor is realized in the outer conductor of the coaxial line, between fingers of a female portion of the outer conductor and a male portion of the outer conductor, where the fingers can be realized in different ways.

An AC coupler for transmitting high-frequency components of a wideband signal includes a signal conductor and a shielding structure arranged as a transmission line. The signal conductor includes a conductive element and a capacitor configured to block direct current (DC) components of the wideband signal while transmitting high-frequency alternating current (AC) components of the wideband signal. The shielding structure is configured for conducting at least the AC components of the wideband signal while confining electric fields and currents in the shielding structure substantially to a region proximate to the signal conductor. The shielding structure has a width substantially greater than a width of the signal conductor. The difference between the shielding structure width and the signal conductor width may be substantially greater than an offset distance between the signal conductor and the shielding structure.

Bias tees, according to certain embodiments of the present invention, include switches in the AC signal path, the DC signal path, or both, to improve the capability of the bias tees to be used for high impedance AC measurement, low current DC measurement, or both. Optical control of the switches, as well as control of the switches using a DC bias present within the AC signal input to the bias tee, is described. Including a set of diodes into the DC signal path, rather than a switch, provides enhanced capability of the bias tee to be used for high impedance AC measurements.

A capacitive feedthrough hermetically sealable to a hybrid module for space applications is provided that includes a multilayer ceramic structure including, on the top face, a metallized top central region designed to receive an input electrical signal to be filtered, a dielectric top region extending around the metallized top central region, and a metallized top peripheral region extending around the dielectric top region up to joining the metallized external closed side walls to act therewith as electrical ground; and, on the bottom face, a metallized bottom central region designed to provide an output filtered electrical signal, a dielectric bottom region extending around the metallized bottom central region, and a metallized bottom peripheral region extending around the dielectric bottom region up to joining the metallized external closed side walls to act therewith as electrical ground. The multilayer ceramic structure further includes ceramic layers, first metallized layers and one or more second metallized layers stacked on one another such that: each first metallized layer is interposed between two respective ceramic layers arranged immediately on and below said first metallized layer; each/the second metallized layer is interposed between two respective ceramic layers arranged immediately on and below said second metallized layer; the first and second metallized layers are vertically alternated such that each/the second metallized layer has a respective upper first metallized layer arranged above said second metallized layer, and a respective lower first metallized layer arranged below said second metallized layer; and two ceramic layers are respectively arranged immediately below the top face and immediately above the bottom face.

A configuration is provided in which two high-frequency power transmission antennas 111, 121 formed on two microstrip lines 101, 102, respectively, are disposed to face each other with an insulating sheet 103 interposed between the two high-frequency power, and the high-frequency power transmission antennas 111, 121 are formed on the two microstrip lines 101, 102, respectively, to realize transmission of high-frequency power, to make it possible to reduce the size of a DC block as compared with a conventional DC block using a coaxial line shape or a waveguide shape, and make it possible to highly efficiently transmit only high-frequency power while cutting off high-voltage direct-current power by the insulating sheet 103.

Bias tees are provided that include a radio frequency (RF) transmission line. The bias tees include a dielectric material that is configured to provide a capacitance between the RF transmission line and ground. The bias tees include a high-frequency port, a common port, and a low-frequency port, and the RF transmission line is coupled between the common port and the low-frequency port.

A phase shifter and a wireless communication device are provided. The phase shifter includes a first substrate, a radio frequency transmission line arranged on a side of the first substrate, and a bias line connected to the radio frequency transmission line. The bias line includes a first wire and a second wire. A sheet resistance of the second wire is greater than a sheet resistance of the radio frequency transmission line. The first wire and the radio frequency transmission line are connected and form an integrated structure. A line width of the first wire is less than a line width of the radio frequency transmission line. The second wire and the first wire form a lapping region in an extension direction of the first wire. In the lapping region, the second wire is arranged on a side of the first wire away from the first substrate.

Aspects of the subject disclosure may include, for example, a differential biasing device that includes first and second bias tees having respective high-frequency biased terminals, high-frequency unbiased terminals and biasing terminals. The first and second bias tees can be configured at least partially on and/or within different layers of a substrate to facilitate a compact configuration. The layers can include surface layers and/or internal layers that enable an overlapping of at least portions of the first and second bias tees. Other embodiments are disclosed.