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Left-handed nonlinear transmission lines-based frequency multiplier

A non-linear transmission line and frequency multiplier technology, applied in power oscillators, electrical components, etc., can solve the problems of limited, low-pass circuits unable to suppress fundamental wave signals, etc., to increase operating frequency, improve microwave characteristics, and reduce volume. Effect

Inactive Publication Date: 2010-06-16
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The traditional right-hand nonlinear transmission line has the following inherent defects: the equivalent circuit of the right-hand transmission line is a low-pass circuit, so the highest frequency of the output harmonic is less than the cut-off frequency of the transmission line, which is limited in high-frequency applications; the low-pass circuit itself cannot suppress the input fundamental wave signal, and the amplitude of the fundamental wave signal is often much larger than the harmonic signal. In order to obtain ideal harmonics, high requirements are placed on the filter in the system; using Schottky diodes as varactors requires a bias circuit

Method used

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  • Left-handed nonlinear transmission lines-based frequency multiplier

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0029] In recent years, methods for constructing left-handed materials by transmission lines periodically loaded with series capacitance and parallel inductance have been proposed. Different from the right-handed transmission line, E, H and k in the left-handed transmission line satisfy the left-handed spiral rule. Both permittivity and permeability are negative in left-handed materials.

[0030] Specifically in the circuit structure, figure 2 The left-hand nonlinear transmission line shown (which contains a PIN diode, two DC-blocking capacitors, and two inductors) with image 3 Compared with the right-hand nonlinear transmission line shown (which contains a PIN diode and two inductors), the positions of the capacitors...

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Abstract

The invention relates to the technical field of microwave circuit, and discloses a left-handed nonlinear transmission lines-based frequency multiplier. The frequency multiplier consists of a single or a plurality of sections of left-handed nonlinear transmission lines, wherein an equivalent circuit of the left-handed nonlinear transmission lines consists of a series variable capacitor and a shunt inductance; and the variable capacitor consists of a self-bias PIN diode. The frequency multiplier can increase the working frequency of the frequency multiplier and improve the microwave characteristics of the frequency multiplier without additionally matching a circuit and adding a bias circuit, thereby greatly simplifying a circuit structure.

Description

technical field [0001] The invention relates to the technical field of microwave circuits, in particular to a frequency multiplier based on a left-handed nonlinear transmission line. Background technique [0002] Microwave frequency multipliers are widely used in systems such as communication, radar and measuring instruments. Its main functions can be summarized in the following aspects: 1. Multiply the oscillator with low frequency but stable output frequency to obtain a high-frequency oscillation source with high stability; 2. The highest oscillation frequency of the transistor oscillator cannot reach When required by the system, the ultra-high frequency oscillation source is obtained through the frequency multiplier; 3. Multiple integer multiple frequencies are obtained. [0003] The nonlinear transmission line is a widely used frequency multiplier structure, which has the advantages of simple structure, no additional matching circuit and idle circuit. A typical nonline...

Claims

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Application Information

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IPC IPC(8): H03B19/18
Inventor 杨浩吴茹菲董军荣黄杰张海英
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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