Abstract:
A mixed-signal circuit board (FIG. 1 ) can provide a flexible arrangement of multiple RF transmission mediums in a single lightweight and compact structure as well as support embedding electronic devices within RF transmission paths (2). The transmission mediums may include a voided waveguide, a dielectric waveguide, a microstrip, a suspended microstrip, a traditional sthpline, and a suspended stripline. The center conductors in each transmission medium may be constructed on the same plane or the same PCB layer in order to simplify coplanar design. A distribution board (4) can be provided to deliver the power supply and control signals to the active electronic devices placed in the signal path of the RF board for signal processing and within covered cavities provided within the RF board.
Abstract:
A pseudo-coaxial vertical transition (10) includes a substrate (16). A bump array is disposed in a substantially concentric bump pattern upon the substrate (16) for simulating a pseudo-coaxial vertical electromagnetic wave propagation. The bump array is formed from a centrally disposed bump (32) having a predetermined bump diameter, and a plurality of at least five ground bumps (36) substantially equi-distant and circularly disposed about the centrally disposed bump (32). The predetermined bump diameter and a bump spacing of the centrally disposed bump are determined in relation to the plurality of ground bumps and a dielectric constant of air for providing a characteristic impedance.
Abstract:
In an interconnect system for providing access to a common I/O terminal for multiple circuit devices such as drivers (40), receivers (44) and electrostatic discharge (48, 50) (ESD) protection devices implemented on an IC (42, 46), each such device is provided with a separate contact pad (52, 54) within the IC (42, 46). The contact pads (52A, 52B or 54A, 54B) are linked to one another and to the IC I/O terminal though inductive conductors such as bond wires (58, 62), metalization layer traces (64) in the IC (42, 46), or legs (56, 60) of a forked, lithographically-defined spring contact formed on the IC (42, 46). The conductor inductance isolates the capacitane of the circuit devices from one another, thereby improving characteristics of the frequency response of the interconnect system. Also the ESD protection function is distributed among multiple ESD devices interconnected by series inductors to provide a multiple-pole filter at each IC terminal. The inductances of the conductors and various capacitances of the interconnect system are also appropriately adjusted to optimize desired interconnect system frequency response characteristics.
Abstract:
An Rf device (100) that comprises unique MEMS RF transmission and circuit components (104-106) that are integrated together on a semiconductor chip (101) to form the RF device (100). These MEMS components (104-106) are monolithically formed on the chip (101) and are also reconfigurable on the chip (101).
Abstract:
A microwave device is based on gap waveguide technology, and comprises two conducting layers (101, 102) arranged with a gap there between, and protruding elements (103, 104) arranged in a periodically or quasi-periodically pattern and fixedly connected to at least one of said conducting layers, thereby forming a texture to stop wave propagation in a frequency band of operation in other directions than along intended waveguiding paths. Sets of complementary protruding elements are either each formed in said pattern and arranged in alignment and overlying each other, the complementary protruding elements of each set forming part of the full length of each protruding element of the pattern, or the sets of complementary protruding elements are arranged in an offset complementary arrangement, the protruding elements of one set thereby being arranged in between the protruding elements of the other set.