摘要:
In a high frequency switch device 33 that switches an output terminal 42 , from which high frequency is outputted, from among a plurality of output terminals 42, to perform the switching the output terminal 42, from which high frequency is outputted, at high speed and with low loss. In the high frequency switch device 33, a branch transmission line 45 corresponding to each output terminal 42 is provided with a switching part 46. In the branch transmission line 45, the switching part 46 includes a transmission side diode 63 that is provided in such a manner that a cathode thereof is arranged on a side of an input terminal 41 and an anode thereof is arranged on a side of the output terminal 42, and a ground side diode 65 that is provided in such a manner that a cathode thereof is grounded and an anode thereof is electrically connected between the output terminal 42 and the transmission side diode 63 in the branch transmission line 45. The branch transmission line 45 includes a first capacitor 51 and a second capacitor 52 on the side of the output terminal 42 from the transmission side diode 63 in such a manner that the anode of the ground side diode 65 is connected between the first capacitor 51 and the second capacitor 52.
摘要:
The present invention relates to a switching circuit for controlling the passage of a radiofrequency signal between a first input/output (101) and a second input/output (105), said circuit including at least one diode (D2) between said inputs/outputs (101, 105), said diode (D2) being polarized by a DC voltage source (Vdc2) via at least two crossed transmission lines (110, 120) interconnecting said diode (D2) with said DC voltage source (Vdc2). The invention can be used in particular for radiocommunication systems, in particular to power systems.
摘要:
Four SP4T switches (31 to 34) are grouped into two pairs so as to constitute two switch pairs. Four first conductor wires (411 to 414, 421 to 424) are respectively arranged between the SP4T switches (31 and 34, 32 and 33) constituting the switch pairs. Four second conductor wires (51 to 54) are connected to each one of the wires arranged in each of the switch pairs among the first conductor wires. The first and the second conductor wires are arranged on a dielectric layer having a lower surface on which a grounding conductor (6) is formed. The dielectric layer has a 2-layer configuration. The first conductor wires a re arranged on the first dielectric layer as a lower layer while the second conductor wires are arranged on the second dielectric layer as an upper layer. With this configuration, it is possible to reduce the size of the matrix, reduce the loss, and enable a wide-band operation.
摘要:
An accumulated charge control (ACC) floating body MOSFET (ACC MOSFET), adapted to control nonlinear response of the MOSFET when the MOSFET is operated in an accumulated charge regime, comprising: a) a MOSFET having a floating body, wherein the floating body MOSFET selectively operates in the accumulated charge regime, and wherein accumulated charge is present in the body of the floating body MOSFET when the MOSFET operates in the accumulated charge regime; and b) an accumulated charge sink (ACS) operatively coupled to the body of the MOSFET, wherein the ACS removes or otherwise controls the accumulated charge in the MOSFET body.
摘要:
A high-frequency device comprises a high-frequency amplifying circuit (HPA1, HPA2), and a high-frequency circuit disposed downstream of said high-frequency amplifying circuit (HPA1, HPA2) for treating a high-frequency signal amplified by said high-frequency amplifying circuit (HPA1, HPA2), wherein said high-frequency amplifying circuit (HPA1, HPA2) comprises a semiconductor element (Q1) and an output matching circuit (MN), said high-frequency circuit comprises a switch circuit (SW1, SW2) for switching connection to transmitting systems and receiving systems, and an impedance matching between said high-frequency amplifying circuit (HPA1, HPA2) and said high-frequency circuit is achieved by said output matching circuit (MN). A phase θ 2 of an impedance Z 2 of each of said high-frequency circuit when viewed from a connection reference plane between said switch circuit (SW1, SW2) and said output matching circuit (MN) is adjusted in a range of -125° to +90° (-125° to -180° and +90° to +180° from 0 point on a Smith chart) in a necessary fundamental frequency band of said high-frequency signal to suppress the amount of variation of the input impedance of said output matching circuit (MN) in the fundamental frequency band.
摘要:
A PIN diode network includes a PIN diode (250) in parallel with an inductor (Ll 220; L2 230). In an off-state of the PIN diode (250) the inductor (Ll 220; L2 230) forms a resonant tank circuit with the PIN diode (250) based on the stray capacitance of the PIN diode. Thus at the operating frequency, isolation for the PIN diode is improved over the PlN diode alone.