5 results about "Nonlinear capacitance" patented technology

This invention relates to the field of optical imaging technology, specifically providing an optical radar co-aperture off-axis imaging system, comprising: an off-axis mirror assembly, a frequency-splitting device, a radar transceiver system, and an optical imaging system. The frequency-splitting device is disposed in the rear optical path of the secondary mirror and is used to reflect light waves and transmit microwaves. The frequency-splitting device includes a frequency-selective surface, which comprises an FSS pattern layer and a bias line layer. The FSS pattern layer includes periodically arranged FSS units. Nonlinear capacitors are electrically connected to the FSS units. The bias line layer applies a voltage to the nonlinear capacitors according to the received microwave band. By changing the voltage applied to the nonlinear capacitors, the resonant frequency of the FSS units is tuned, thereby changing the microwave passband frequency of the frequency-splitting device. This invention not only achieves a reflective wave-transmitting microwave design but also solves the problem that transmitting only a single band of microwaves in microwave-transmitting and light-reflecting methods is difficult to adapt to different task requirements.

The application discloses a kind of based on full distribution nonlinear transmission line's ultra-wideband phase shifter, belong to communication technical field.The full distribution nonlinear transmission line includes: substrate and be located on the substrate heterojunction layer, as the cathode of Schottky diode ground line and as the signal line of Schottky diode anode are set on the heterojunction layer, cathode anode is connected through two-dimensional electron gas channel formed in heterojunction layer;The full distribution nonlinear transmission line is configured to receive anode bias by the signal line, to make the equivalent nonlinear capacitance of the Schottky diode change with the change of anode bias, and regulate the effective dielectric constant of the full distribution nonlinear transmission line.The application changes the equivalent nonlinear capacitance of Schottky diode by adjusting direct current bias applied on signal line, and then regulates the effective dielectric constant of full distribution nonlinear transmission line, realizes continuous, adaptive regulation and control to input signal phase.

Methods and devices used to cancel non-linear capacitances in high power radio frequency (RF) switches manufactured in bulk complementary metal-oxide-semiconductor (CMOS) processes are disclosed. The methods and devices are also applicable to stacked switches and RF switches fabricated in silicon-on-insulator (SOI) technology.

An optimization method for sparse matrix-vector multiplication of multiple matrices with the same structure is applied to the iterative solution process of harmonic balance methods in radio frequency circuit simulation. The method includes: obtaining a first sparse matrix and a second sparse matrix of the circuit, wherein the first and second sparse matrices have the same structure and are used to characterize the nonlinear conductance and nonlinear capacitance characteristics of the circuit, respectively; in response to performing matrix-vector multiplication, in one traversal, simultaneously accessing the non-zero elements located at the same position in both the first and second sparse matrices, and performing multiplication and accumulation operations with the corresponding input vector elements to obtain the output vectors of the corresponding first and second sparse matrices; wherein the input vector is the harmonic component vector of the circuit node voltage. This invention, based on the combined access of multiple matrices with the same sparse structure, significantly reduces loop control overhead, thereby improving the overall efficiency of matrix-vector multiplication.