CN111884615A - High-order broadband input impedance matching network and application thereof - Google Patents
High-order broadband input impedance matching network and application thereof Download PDFInfo
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- CN111884615A CN111884615A CN202010872027.5A CN202010872027A CN111884615A CN 111884615 A CN111884615 A CN 111884615A CN 202010872027 A CN202010872027 A CN 202010872027A CN 111884615 A CN111884615 A CN 111884615A
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- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
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- H03H7/38—Impedance-matching networks
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a high-order broadband input impedance matching network and application thereof. The fourth or sixth-order impedance transformation network is realized by inductance, capacitance, resistance and coupling effect among the inductances. Compared with the traditional structure matching network which is only suitable for circuits with low bandwidth requirements, the high-order broadband input impedance matching network can realize broadband impedance matching in a millimeter wave frequency band and has low insertion loss, can be applied to impedance matching designs in circuits such as a low-noise amplifier and a power amplifier, and has good engineering and practical application values.
Description
Technical Field
The invention relates to a broadband matching network and application thereof, belonging to the field of circuits and systems, in particular to the technical field of microwave/radio frequency/millimeter wave integrated circuits of microelectronics and solid-state electronics.
Background
The wireless mobile communication technology is beginning from the 1G era of the last 80 th century, and is about to advance into the 5G era through short development of more than thirty years, and a wireless communication system brings great comfort and convenience to daily life of people and simultaneously puts higher requirements on the performance of the wireless mobile communication system. In order to meet different data service requirements of operators in wireless mobile communication and meet the requirements of continuously improving the transmission rate, the information content and the signal quality of signals in wireless mobile communication, the bandwidth performance of a radio frequency power amplifier in a system is improved accordingly.
In the design of broadband power amplifiers, it is of utmost importance to design a suitable matching network to achieve a continuous optimal impedance matching within the required bandwidth. Matching networks have wide application in radio frequency microwave circuits, such as: low noise amplifiers, power amplifiers, mixers, couplers, etc., the impedance matching network is not only a basic component of them, but its design is in a sense that it determines the success or failure of the overall circuit design. In order to achieve the matching, a common method at present is to use open-circuit or short-circuit stub wires to construct a low-pass or band-pass matching network, but it is difficult to achieve matching of perfect impedance with each frequency point in a required frequency band, so that the gain variation of a small signal within a required bandwidth is large in amplitude, and the linearity is poor. Therefore, the research on the matching network is of great significance to the design of electronic systems, particularly the design of radio frequency microwave circuits.
The matching network design method can obtain good matching performance, meets expected indexes, and expands a new idea of the matching problem of the radio frequency broadband power amplifier.
The literature "R.Ludwig, P.bretchko, RF Circuit Design: the Theory and Applications [ M ] Queen, Zhang Zhao, Xuzhong and equi-translating, electronics industry Press, 2002: 270-287, "a design method for impedance matching using smith charts is described, which can only be used for a simple narrow-band matching network design, and does not mention a matching network design that can operate in a wide frequency band.
A method for implementing complex impedance broadband matching by using distributed circuit elements is proposed in the documents "C.F uzy AND A.Z loyy," Design of branched complex impedance-matching networks AND the third applications for branched microwave amplifiers, "18-th INTERNATIONAL CONFERENCE ON MICROWAVES, RADAR AND WIRE SSCOMMUNICATIONS, Vilnius,2010, pp.1-4". The method is the combination of a classical analytic network theory method of a lumped element matching network and a numerical optimization technology. The network structure verifies that the frequency range is only between 1.5GHz and 2.5 GHz.
In summary, the conventional method for matching the broadband of the radio frequency/millimeter wave amplifier faces the problems of narrow working bandwidth, large insertion loss and the like. The problem to be solved is how to design the connection network between the signal source and the load such that the power delivered by the signal source to the load remains relatively stable and as maximum as possible within a given frequency band.
Disclosure of Invention
The invention aims to provide a matching circuit for improving the performance of a bandwidth amplifier, which realizes broadband impedance matching and has lower insertion loss. The problem to be solved is how to design the connection network between the signal source and the load such that the power delivered by the signal source to the load remains relatively stable within a given frequency band and is maximized as much as possible. The invention solves the problems of narrow working bandwidth and large insertion loss of the traditional matching network and provides a feasible and effective design method of the matching network of the broadband power amplifier.
The invention adopts the following technical scheme for solving the technical problems:
a high-order broadband input impedance matching network is composed of a fourth-order or sixth-order impedance transformation network and a series capacitor. The four-order or six-order impedance transformation network is realized by coupling effects among an inductor, a capacitor, a resistor and the inductor, two ports of the two-port four-order impedance transformation network are an input port and an output port, and three ports of the three-port six-order input network are an input port and two output ports. It can extend the working bandwidth and greatly reduce the insertion loss of the circuit.
Preferably, the positive end of the input port of the fourth-order impedance transformation network is connected with the negative end of the series capacitor, the negative end of the input port of the fourth-order impedance transformation network is connected with the negative end of the input end of the high-order broadband input impedance matching network, the positive end of the series capacitor is connected with the positive end of the input end of the high-order broadband input impedance matching network, the positive end of the output port of the fourth-order impedance transformation network is connected with the positive end of the output end of the high-order broadband input impedance matching network, and the negative end of the output port of the fourth-order impedance transformation network is connected with the negative end of the output end of the high; the positive end of an input port of the sixth-order impedance transformation network is connected with the positive end of the input end of the high-order broadband input impedance matching network, the negative end of the input port of the sixth-order impedance transformation network is connected with the positive end of the series capacitor, the negative end of the series capacitor is connected with the negative end of the input end of the high-order broadband input impedance matching network, the positive end of an output port of the sixth-order impedance transformation network is connected with the positive end of the output end of the high-order broadband input impedance matching network, and the negative end of the output port of the sixth-order impedance transformation network is connected with the negative end of the output end of the. The two circuits can effectively expand the circuit bandwidth, occupy small chip area and reduce cost.
Preferably, the fourth-order impedance transformation network at least comprises a first inductor, a second inductor, a first capacitor, a second capacitor and a first resistor, the positive end of the first inductor is connected with the positive end of the input port of the fourth-order impedance transformation network, the negative end of the first inductor is connected with the negative end of the input port of the fourth-order impedance transformation network, the positive end of the second inductor is connected with the positive end of the output port of the fourth-order impedance transformation network, the negative end of the second inductor is connected with the negative end of the output port of the fourth-order impedance transformation network, and the first inductor is connected with the second inductor in a coupling mode. The arrangement can solve the problem of narrow working bandwidth of the traditional radio frequency/millimeter wave amplifier broadband matching network, and lower insertion loss can be ensured while the bandwidth is expanded.
Preferably, the fourth-order impedance transformation network is realized by capacitive coupling and inductive coupling, and further comprises a third capacitor and a fourth capacitor, wherein a first positive inductance end, a first positive capacitance end, a third positive capacitance end and a first positive resistance end are connected, a first negative inductance end, a first negative capacitance end and a fourth positive capacitance end are connected with the first negative resistance end, a second positive inductance end, a second positive capacitance end, a third negative capacitance end and a second positive resistance end are connected, a second negative inductance end, a second negative capacitance end, a fourth negative capacitance end and a second negative resistance end are connected, the first inductor and the second inductor are connected in a capacitive coupling mode, and the capacitive coupling mode has the advantages of simple structure and convenience in design; the fourth-order impedance transformation network is realized through capacitive coupling and inductive coupling, and further comprises a third inductor and a fourth inductor, wherein a first inductor positive end, a first capacitor positive end and a third inductor positive end are connected with a first resistor positive end, a first inductor negative end, a first capacitor negative end and a fourth inductor positive end are connected with the first resistor negative end, a second inductor positive end, a second capacitor positive end and a third inductor negative end are connected with a second resistor, a second inductor positive end, a second capacitor negative end and a fourth inductor negative end are connected with the second resistor negative end, the first inductor and the second inductor are connected in an inductive coupling mode, and the inductive coupling mode has the advantages of flexible design and effective bandwidth expansion; the fourth-order impedance transformation network is realized through capacitive coupling and magnetic coupling, and further comprises a third capacitor and a fourth capacitor, wherein a first inductance positive end, a first capacitance positive end and a third capacitance positive end are connected with a first resistance positive end, a first inductance negative end, a first capacitance negative end and a fourth capacitance positive end are connected with the first resistance negative end, a second inductance positive end, a second capacitance positive end and a third capacitance negative end are connected with a second resistance, a second inductance negative end, a second capacitance negative end and a fourth capacitance negative end are connected with the second resistance negative end, the first inductor and the second inductor are connected in a magnetic coupling mode, the coupling coefficient is k12, the magnetic coupling mode is convenient to adjust, and the bandwidth is effectively expanded.
Preferably, the sixth-order impedance transformation network comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor and a sixth inductor, wherein the negative end of the first inductor is connected with the positive end of the second inductor, the negative end of the third inductor is connected with the positive end of the fourth inductor and connected in parallel with VB, the negative end of the fifth inductor is connected with the positive end of the sixth inductor and connected in parallel with ground, the positive end of the first inductor is connected with the positive end of the input port of the sixth-order impedance transformation network, the negative end of the second inductor is connected with the negative end of the input port of the sixth-order impedance transformation network, the positive ends of the third inductor and the fifth inductor are connected with the positive end of the output port of the fourth-order impedance transformation network, and the negative ends of the fourth inductor and the sixth inductor are connected with the negative end of the output port of. The arrangement makes the design flexible, expands the working bandwidth and greatly reduces the insertion loss of the circuit.
In the concrete implementation, the inductor in the network is realized by an on-chip inductor or a bonding wire, and the capacitor is realized by an on-chip capacitor, an on-chip variable capacitor or a parasitic capacitor among the inductors.
Preferably, the low noise amplifier circuit comprises a fourth-order broadband input impedance matching network and an amplifying unit. The amplifying unit is a common source amplifier and comprises a first N-type transistor and a second N-type transistor. The positive end of an input port of the fourth-order impedance transformation network is connected with the negative end of a series capacitor, the negative end of the input port of the fourth-order impedance transformation network is connected with the negative end of the input end of the high-order broadband input impedance matching network, the positive end of the series capacitor is connected with the positive end of the input end of the high-order broadband input impedance matching network, the positive end of an output port of the fourth-order impedance transformation network is connected with the grid electrode of a first N-type transistor, the negative end of an output port of the fourth-order impedance transformation network is connected with the grid electrode of a second N-type transistor, and the source electrodes of the first N-type transistor and the second N-type transistor are connected and. The application of the four-order broadband input impedance matching network in the low-noise amplifier can ensure that the input matching performance is good, the insertion loss is small, and in addition, the noise coefficient can be greatly reduced.
Preferably, the low noise amplifier circuit comprises a sixth-order broadband input impedance matching network, an amplifying unit and a load network, wherein the amplifying unit is of a differential structure and comprises a first N-type transistor and a second N-type transistor. The positive end of an input port of the sixth-order impedance transformation network is connected with the positive end of the input end of the high-order broadband input impedance matching network, the negative end of the input port of the sixth-order impedance transformation network is connected with the positive end of a series capacitor, the negative end of the series capacitor is connected with the negative end of the input end of the high-order broadband input impedance matching network, a first output port and a second output port of the sixth-order impedance transformation network are respectively connected with the grid electrode and the source electrode of the first transistor and the second transistor, and two ends of the load network are respectively connected with the grid electrode and the drain electrode of the first transistor and.
Preferably, the low noise amplifier circuit includes a sixth-order wideband input impedance matching network, an amplifying unit, a first capacitor, a second capacitor, a third capacitor, and a first resistor, and the amplifying unit is a differential structure and includes a first N-type transistor and a second N-type transistor. The positive end of an input port of the three-port sixth-order impedance transformation network is connected with the positive end of the input end of the high-order broadband input impedance matching network, the negative end of the input port of the sixth-order impedance transformation network is connected with the positive end of the series capacitor, and the negative end of the series capacitor is connected with the negative end of the input end of the high-order broadband input impedance matching network. The positive end of an output port of the sixth-order impedance transformation network is connected with the grid electrode of the first transistor and the positive end of the second capacitor, and the negative end of the output port of the sixth-order impedance transformation network is connected with the grid electrode of the second transistor and the negative end of the first capacitor; the positive end of the output port of the sixth-order impedance transformation network is connected with the source electrode of the second transistor, and the negative end of the output port of the sixth-order impedance transformation network is connected with the source electrode of the first transistor. The positive end of the first capacitor is connected with the drain electrode of the first transistor and the positive end of the output port, and the negative end of the second capacitor is connected with the drain electrode of the second transistor and the negative end of the output port.
Compared with the prior art, the invention has the following technical effects:
1. the high-order broadband input impedance matching network can effectively widen the bandwidth, can approximately expand twenty percent compared with the bandwidth in the prior art, and solves the problem of narrow working bandwidth of the traditional impedance matching network;
2. the invention relates to a high-order broadband input impedance matching network, which solves the problem of large insertion loss of a traditional circuit unit for realizing broadband impedance matching in a millimeter wave frequency band.
3. The high-order broadband input impedance matching network can realize broadband impedance matching in a millimeter wave frequency band, has low insertion loss, can be applied to impedance matching design in circuits such as a low-noise amplifier, a power amplifier and the like, and has good engineering and practical application values.
Drawings
Fig. 1 is a block diagram of a high-order wideband input impedance matching network according to the present invention.
Fig. 2 is a block diagram of a high-order wideband input impedance matching network according to the present invention.
FIG. 3 is a schematic circuit diagram of a fourth-order impedance transformation network according to an embodiment of the present invention.
FIG. 4 is a circuit schematic diagram of an embodiment of a fourth-order impedance transformation network according to the present invention.
FIG. 5 is a circuit schematic diagram of an embodiment of a fourth-order impedance transformation network according to the present invention.
FIG. 6 is a circuit schematic diagram of an embodiment of a fourth-order impedance transformation network according to the present invention.
FIG. 7 is a schematic circuit diagram of an embodiment of a sixth-order impedance transformation network according to the present invention.
Fig. 8 is a schematic circuit diagram of an embodiment of a low noise amplifier circuit based on a high-order wideband input impedance matching network according to the present invention.
Fig. 9 is a schematic circuit diagram of an embodiment of a low noise amplifier circuit based on a high-order wideband input impedance matching network according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Example (b): the invention discloses a high-order broadband input impedance matching network, which comprises a fourth-order or sixth-order impedance transformation network and a series capacitor, and is realized by an inductor, a capacitor, a resistor and a coupling effect among the inductors; the broadband impedance matching can be realized in a millimeter wave frequency band, the insertion loss is low, the broadband impedance matching circuit can be applied to impedance matching design in circuits such as a low-noise amplifier and a power amplifier, and the broadband impedance matching circuit has good engineering and practical application values.
As shown in fig. 1, the high-order wideband input impedance matching network according to the embodiment of the present invention includes a fourth-order impedance transforming network and a series capacitor. The positive end of an input port of the fourth-order impedance transformation network is connected with the negative end of the series capacitor, the negative end of the input port of the fourth-order impedance transformation network is connected with the negative end of the input end of the high-order broadband input impedance matching network, the positive end of the series capacitor is connected with the positive end of the input end of the high-order broadband input impedance matching network, the positive end of an output port of the fourth-order impedance transformation network is connected with the positive end of the output end of the high-order broadband input impedance matching network, and the negative end of the output port of the fourth-order impedance transformation network is connected with the negative end of the output end of the.
As shown in fig. 2, the high-order wideband input impedance matching network according to the embodiment of the present invention includes a sixth-order impedance transforming network and a series capacitor. The positive end of an input port of the sixth-order impedance transformation network is connected with the positive end of the input end of the high-order broadband input impedance matching network, the negative end of the input port of the sixth-order impedance transformation network is connected with the positive end of the series capacitor, the negative end of the series capacitor is connected with the negative end of the input end of the high-order broadband input impedance matching network, the positive end of an output port of the sixth-order impedance transformation network is connected with the positive end of the output end of the high-order broadband input impedance matching network, and the negative end of the output port of the sixth-order impedance transformation network is connected with the negative end of the output end of the.
The fourth-order impedance transformation network at least comprises a first inductor, a second inductor, a first capacitor, a second capacitor, a first resistor and a second resistor, wherein a positive end of the first inductor and a positive end of the first capacitor are connected with a positive end of the first resistor, a negative end of the first inductor and a negative end of the first capacitor are connected with a negative end of the first resistor, a positive end of the second inductor and a positive end of the second capacitor are connected with a positive end of the second resistor, a negative end of the second inductor and a negative end of the second capacitor are connected with a negative end of the second resistor, the positive end of the first inductor is connected with a positive end of an input port of the fourth-order impedance transformation network, the negative end of the first inductor is connected with a negative end of the input port of the fourth-order impedance transformation network, the positive end of the second inductor is connected with a positive end of the output port of the fourth-order impedance transformation network, and the negative end of the second inductor is connected with a negative end of the.
The fourth-order impedance transformation network can realize broadband impedance matching and has lower insertion loss by reasonably designing the inductance, the capacitance and the coupling coefficient. Fig. 3 shows a first specific circuit structure of a fourth-order impedance transformation network according to an embodiment of the present invention, which is implemented by capacitive coupling and inductive coupling. The fourth-order impedance transformation network comprises a first inductor L1, a second inductor L2, a first capacitor C1, a second capacitor C2 and a first resistor R1, the positive end of a second resistor R2, the positive end of a first inductor L1 and the positive end of a first capacitor C1 are connected with the positive end of a first resistor R1, the negative end of a first inductor L1 and the negative end of a first capacitor C1 are connected with the negative end of a first resistor R1, the positive end of a second inductor L2 and the positive end of a second capacitor C2 are connected with the positive end of a second resistor R2, the negative end of a second inductor L2 and the negative end of a second capacitor C2 are connected with the negative end of a second resistor R2, a coupling coefficient k12 exists between the first inductor L1 and the second inductor L2, the positive end of a first inductor L1 is connected with the positive end of a fourth-order impedance transformation network, the negative end of a first inductor L1 is connected with the negative end of an input port of the fourth-order impedance transformation network, the positive end of a second inductor L2 is connected with the output port of the fourth-order impedance transformation network, and the positive end of the second inductor L2 is connected with the output port of the.
Fig. 4 shows a second specific circuit structure of the fourth-order impedance transformation network according to the embodiment of the present invention. The fourth-order impedance transforming network comprises a first inductor L1, a second inductor L2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first resistor R1 and a second resistor R2, wherein the positive terminal of the first inductor L1, the positive terminal of the first capacitor C1 and the positive terminal of the third capacitor C3 are connected with the positive terminal of the first resistor R1, the positive terminal of the first inductor L1, the negative terminal of the first capacitor C1 and the positive terminal of the fourth capacitor C4 are connected with the negative terminal of the first resistor R1, the positive terminal of the second inductor L2, the positive terminal of the second capacitor C2, the negative terminal of the third capacitor C3 and the positive terminal of the second resistor R3 are connected with each other, the negative terminal of the second inductor L3, the positive terminal of the second capacitor C3, the negative terminal of the fourth inductor L3 is connected with the fourth-order impedance transforming network, the negative terminal of the fourth-order impedance transforming network 3, and the fourth-order impedance transforming network 3, the negative end of the second inductor L2 is connected with the negative end of the output port of the fourth-order impedance transformation network.
Fig. 5 shows a third specific circuit structure of the fourth-order impedance transformation network according to the embodiment of the invention. The fourth-order impedance transforming network comprises a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a first capacitor C1, a second capacitor C2, a first resistor R1 and a second resistor R2, wherein the positive terminal of the first inductor L1, the positive terminal of the first capacitor C1 and the positive terminal of the third inductor L3 are connected with the positive terminal of the first resistor R1, the positive terminal of the first inductor L1, the negative terminal of the first capacitor C1 and the positive terminal of the fourth inductor L4 are connected with the negative terminal of the first resistor R1, the positive terminal of the second inductor L2, the positive terminal of the second capacitor C2, the positive terminal of the third inductor L3 and the positive terminal of the second resistor R3 are connected with each other, the negative terminal of the second inductor L3, the positive terminal of the first inductor L3, the negative terminal of the fourth inductor L3 is connected with the fourth-order impedance transforming network, the negative terminal of the fourth inductor L3, and the fourth-order impedance transforming network 3, the negative end of the second inductor L2 is connected with the negative end of the output port of the fourth-order impedance transformation network.
Fig. 6 shows a fourth specific circuit structure of the fourth-order impedance transformation network according to the embodiment of the present invention. The fourth-order impedance transforming network comprises a first inductor L1, a second inductor L2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first resistor R1 and a second resistor R2, wherein the positive terminal of the first inductor L1, the positive terminal of the first capacitor C1 and the positive terminal of the third capacitor C3 are connected with the positive terminal of the first resistor R1, the positive terminal of the first inductor L1, the negative terminal of the first capacitor C1, the positive terminal of the fourth capacitor C1 are connected with the negative terminal of the first resistor R1, the positive terminal of the second inductor L1, the positive terminal of the second capacitor C1, the negative terminal of the third capacitor C1 and the positive terminal of the second resistor R1 are connected with each other, the negative terminal of the second inductor L1, the negative terminal of the second capacitor C1, the negative terminal of the fourth capacitor C1 and the negative terminal of the second resistor R1 are connected with an impedance transforming network, and the fourth-order impedance transforming network 1 is connected between the positive terminal of the first inductor L1 and the fourth-order impedance transforming network 1, the positive end of the second inductor L2 is connected with the positive end of the output port of the fourth-order impedance transformation network, and the negative end of the second inductor L2 is connected with the negative end of the output port of the fourth-order impedance transformation network.
Fig. 7 shows a specific circuit structure of a sixth-order impedance transformation network according to an embodiment of the present invention. The sixth-order impedance transformation network comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor and a sixth inductor, wherein the negative end of the first inductor is connected with the positive end of the second inductor, the negative end of the third inductor is connected with the positive end of the fourth inductor in parallel and VB, the negative end of the fifth inductor is connected with the positive end of the sixth inductor in parallel and grounded, the positive end of the first inductor is connected with the positive end of an input port of the sixth-order impedance transformation network, the negative end of the second inductor is connected with the negative end of the input port of the sixth-order impedance transformation network, the positive ends of the third inductor and the fifth inductor are connected with the positive end of an output port of the fourth-order impedance transformation network, and the negative ends of the fourth inductor and the sixth inductor are connected with the negative end of the output port of the.
The high-order broadband input impedance matching network provided by the embodiment of the invention can be applied to an amplifier circuit, can effectively widen the bandwidth and reduce the insertion loss, can keep the power transmitted to a load by a signal source relatively stable in a given frequency band, and can reach the maximum as far as possible. The amplifier circuit can be a low noise amplifier and a power amplifier, and comprises a broadband input impedance matching network, a plurality of amplifying units and an output matching network; the high-order broadband input impedance matching network is positioned at the foremost end of the amplifier and used as an input impedance matching network. The low noise amplifier circuit will be specifically described below.
Fig. 8 is a schematic circuit diagram of a specific embodiment of a low noise amplifier circuit based on a high-order wideband input impedance matching network according to an embodiment of the present invention. The high-order broadband input impedance matching network is applied to a low-noise amplifier circuit and serves as an input impedance matching network; the low-noise amplifier of the embodiment of the invention has the function of effectively widening the bandwidth and greatly reduces the insertion loss. The low-noise amplifier circuit comprises a fourth-order broadband input impedance matching network, an amplifying unit, a third resistor and a third capacitor. The amplifying unit is a common source amplifier and comprises a first N-type transistor and a second N-type transistor. The positive end of an input port of the fourth-order impedance transformation network is connected with the negative end of a series capacitor, the negative end of the input port of the fourth-order impedance transformation network is connected with the negative end of the input end of the high-order broadband input impedance matching network, the positive end of the series capacitor is connected with the positive end of the input end of the high-order broadband input impedance matching network, the positive end of an output port of the fourth-order impedance transformation network is connected with the grid electrode of a first N-type transistor, the negative end of an output port of the fourth-order impedance transformation network is connected with the grid electrode of a second N-type transistor, the drain electrode of the first N-type transistor, the positive end of a third resistor, the positive end of a third capacitor and the positive end of the output end are connected, the drain electrode of the second N-type transistor, the negative end of the third resistor, the negative end of the third capacitor and the negative end of the output end are connected.
Fig. 9 is a schematic circuit diagram of another specific embodiment of a low noise amplifier circuit based on a high-order wideband input impedance matching network according to an embodiment of the present invention. The low noise amplifier circuit comprises a sixth-order broadband input impedance matching network, a first N-type transistor, a second N-type transistor, a first capacitor, a second capacitor, a third capacitor and a first resistor. The positive end of an input port of the three-port sixth-order impedance transformation network is connected with the positive end of the input end of the high-order broadband input impedance matching network, the negative end of the input port of the sixth-order impedance transformation network is connected with the positive end of the series capacitor, and the negative end of the series capacitor is connected with the negative end of the input end of the high-order broadband input impedance matching network. The positive end of an output port of the sixth-order impedance transformation network is connected with the grid electrode of the first transistor and the positive end of the second capacitor, and the negative end of the output port of the sixth-order impedance transformation network is connected with the grid electrode of the second transistor and the negative end of the first capacitor; the positive end of the output port of the sixth-order impedance transformation network is connected with the source electrode of the second transistor, and the negative end of the output port of the sixth-order impedance transformation network is connected with the source electrode of the first transistor. The positive end of the first capacitor, the drain electrode of the first transistor, the positive end of the third capacitor, the positive end of the first resistor and the positive end of the output port are connected, and the negative ends of the second capacitor, the drain electrode of the second transistor, the negative end of the third capacitor, the negative end of the first resistor and the negative end of the output port are connected.
The above embodiments are only for illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited thereto, and any modifications made on the basis of the technical solution according to the technical idea of the present invention fall within the scope of the claims of the present invention.
Claims (9)
1. A high order broadband input impedance matching network, characterized by: the high-order broadband input impedance matching network comprises a two-port four-order or three-port six-order impedance transformation network and a series capacitor, and is realized by coupling effects among an inductor, a capacitor, a resistor and the inductor, two ports of the two-port four-order impedance transformation network are an input port and an output port, and three ports of the three-port six-order input network are an input port and two output ports.
2. The higher-order wideband input impedance matching network of claim 1, wherein: the positive end of an input port of the fourth-order impedance transformation network is connected with the negative end of a series capacitor, the negative end of the input port of the fourth-order impedance transformation network is connected with the negative end of the input end of the high-order broadband input impedance matching network, the positive end of the series capacitor is connected with the positive end of the input end of the high-order broadband input impedance matching network, the positive end of an output port of the fourth-order impedance transformation network is connected with the positive end of the output end of the high-order broadband input impedance matching network, and the negative end of the output port of the fourth-order impedance transformation network is connected with the negative end of the output end of the; the positive end of an input port of the sixth-order impedance transformation network is connected with the positive end of the input end of the high-order broadband input impedance matching network, the negative end of the input port of the sixth-order impedance transformation network is connected with the positive end of the series capacitor, the negative end of the series capacitor is connected with the negative end of the input end of the high-order broadband input impedance matching network, the positive end of an output port of the sixth-order impedance transformation network is connected with the positive end of the output end of the high-order broadband input impedance matching network, and the negative end of the output port of the sixth-order impedance transformation network is connected with the negative end of the output end of the.
3. A high order wideband input impedance matching network as defined in claim 1, wherein: the fourth-order impedance transformation network at least comprises a first inductor, a second inductor, a first capacitor, a second capacitor, a first resistor and a second resistor, wherein a positive end of the first inductor, a positive end of the first capacitor and a positive end of the first resistor are connected, a negative end of the first inductor, a negative end of the first capacitor and a negative end of the first resistor are connected, a positive end of the second inductor, a positive end of the second capacitor and a positive end of the second resistor are connected, a negative end of the second inductor, a negative end of the second capacitor and a negative end of the second resistor are connected, the positive end of the first inductor is connected with the positive end of an input port of the fourth-order impedance transformation network, the negative end of the first inductor is connected with the negative end of an input port of the fourth-order impedance transformation network, the positive end of the second inductor is connected with the positive end of an output port of the fourth-order impedance transformation network, the negative end of the second inductor is connected with the negative end of the output port of the fourth-order impedance transformation.
4. A high order wideband input impedance matching network as claimed in claim 3, wherein: the fourth-order impedance transformation network further comprises a third capacitor and a fourth capacitor, a first inductance positive end, a first capacitance positive end, a third capacitance positive end and a first resistance positive end are connected, a first inductance negative end, a first capacitance negative end and a fourth capacitance positive end are connected with the first resistance negative end, a second inductance positive end, a second capacitance positive end, a third capacitance negative end and a second resistance positive end are connected, a second inductance negative end, a second capacitance negative end and a fourth capacitance negative end are connected with the second resistance negative end, and the first inductor and the second inductor are connected in a capacitive coupling mode; the fourth-order impedance transformation network further comprises a third inductor and a fourth inductor, wherein a positive end of the first inductor, a positive end of a first capacitor, a positive end of the third inductor and a positive end of the first resistor are connected, a negative end of the first inductor, a negative end of the first capacitor and a positive end of the fourth inductor are connected with a negative end of the first resistor, a positive end of the second inductor, a positive end of the second capacitor, a negative end of the third inductor and a negative end of the third inductor are connected with a positive end of the second resistor, a negative end of the second inductor, a negative end of the second capacitor and a negative end of the fourth inductor are connected with a negative end of the second resistor, and the first inductor and the second inductor are connected in an inductive coupling mode; the fourth-order impedance transformation network further comprises a third capacitor and a fourth capacitor, a first inductance positive end, a first capacitance positive end and a third capacitance positive end are connected with the first resistance positive end, a first inductance negative end, a first capacitance negative end and a fourth capacitance positive end are connected with the first resistance negative end, a second inductance positive end, a second capacitance positive end and a third capacitance negative end are connected with the second resistance positive end, a second inductance negative end, a second capacitance negative end and a fourth capacitance negative end are connected with the second resistance negative end, the first inductor and the second inductor are connected in a magnetic coupling mode, and the coupling coefficient is k 12.
5. The higher-order wideband input impedance matching network of claim 1, wherein: the sixth-order impedance transformation network comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor and a sixth inductor, wherein the negative end of the first inductor is connected with the positive end of the second inductor, the negative end of the third inductor is connected with the positive end of the fourth inductor and connected in parallel with VB, the negative end of the fifth inductor is connected with the positive end of the sixth inductor and connected in parallel with the ground, the positive end of the first inductor is connected with the positive end of an input port of the sixth-order impedance transformation network, the negative end of the second inductor is connected with the negative end of the input port of the sixth-order impedance transformation network, the positive ends of the third inductor and the fifth inductor are connected with the positive end of an output port of the fourth-order impedance transformation network, and the negative ends of the fourth inductor and the sixth inductor are connected with the negative end of the.
6. A high order wideband input impedance matching network as claimed in any of claims 1-5, where the inductors in the network are implemented as on-chip inductors or bond wires, and the capacitors are implemented as on-chip capacitors, on-chip variable capacitors or parasitic capacitors between inductors.
7. A low noise amplifier circuit using the high-order wideband input impedance matching network as defined in any one of claims 3 or 4, wherein the low noise amplifier circuit comprises a fourth-order wideband input impedance matching network, an amplifying unit, a third resistor and a third capacitor, the amplifying unit is a common source amplifier comprising a first N-type transistor and a second N-type transistor, the positive terminal of the input port of the fourth-order impedance transforming network is connected to the negative terminal of the series capacitor, the negative terminal of the input port of the fourth-order impedance transforming network is connected to the negative terminal of the input port of the high-order wideband input impedance matching network, the positive terminal of the input port of the series capacitor is connected to the positive terminal of the input port of the high-order wideband input impedance matching network, the positive terminal of the output port of the fourth-order impedance transforming network is connected to the gate of the first N-type transistor, the negative terminal of the output port of the fourth-order impedance transforming network is connected to the gate of the second N, the drain electrode of the first N-type transistor, the positive end of the third resistor, the positive end of the third capacitor and the positive end of the output end are connected, the drain electrode of the second N-type transistor, the negative end of the third resistor, the negative end of the third capacitor and the negative end of the output end are connected, and the source electrodes of the first N-type transistor and the second N-type transistor are connected and grounded.
8. The low noise amplifier circuit with the high-order wideband input impedance matching network as claimed in claim 5, wherein the low noise amplifier circuit comprises a sixth-order wideband input impedance matching network, an amplifying unit and a load network, the amplifying unit is a differential structure and comprises a first N-type transistor and a second N-type transistor; the positive end of an input port of the sixth-order impedance transformation network is connected with the positive end of the input end of the high-order broadband input impedance matching network, the negative end of the input port of the sixth-order impedance transformation network is connected with the positive end of a series capacitor, the negative end of the series capacitor is connected with the negative end of the input end of the high-order broadband input impedance matching network, a first output port and a second output port of the sixth-order impedance transformation network are respectively connected with the grid electrode and the source electrode of the first transistor and the second transistor, and two ends of the load network are respectively connected with the grid electrode and the drain electrode of the first transistor and.
9. A low noise amplifier circuit using the high order wideband input impedance matching network of claim 8, the low noise amplifier circuit is characterized by comprising a sixth-order broadband input impedance matching network, an amplifying unit, a first capacitor, a second capacitor, a third capacitor and a first resistor, wherein the amplifying unit is of a differential structure and comprises a first N-type transistor and a second N-type transistor, the positive end of an input port of the sixth-order impedance transformation network is connected with the positive end of the input end of the high-order broadband input impedance matching network, the negative end of the input port of the sixth-order impedance transformation network is connected with the positive end of the series capacitor, the negative end of the series capacitor is connected with the negative end of the input end of the high-order broadband input impedance matching network, the positive end of an output port of the sixth-order impedance transformation network is connected with the grid electrode of the first transistor and the positive end of the second capacitor, and the negative end of the output port of the sixth-order impedance transformation network is connected with the grid electrode of the second transistor and the negative end of the first capacitor; the positive end of the output port of the sixth-order impedance transformation network is connected with the source electrode of the second transistor, the negative end of the output port of the sixth-order impedance transformation network is connected with the source electrode of the first transistor, the positive end of the first capacitor, the drain electrode of the first transistor, the positive end of the third capacitor, the positive end of the first resistor and the positive end of the output port are connected, and the negative end of the second capacitor, the drain end of the second transistor, the negative end of the third capacitor, the negative end of the first resistor and the negative end of the output port are connected.
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