CN116846347A - Radio frequency LNA bandwidth expanding device and low noise amplifier - Google Patents

Radio frequency LNA bandwidth expanding device and low noise amplifier Download PDF

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Publication number
CN116846347A
CN116846347A CN202310787490.3A CN202310787490A CN116846347A CN 116846347 A CN116846347 A CN 116846347A CN 202310787490 A CN202310787490 A CN 202310787490A CN 116846347 A CN116846347 A CN 116846347A
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CN
China
Prior art keywords
module
switch
capacitor
combination unit
radio frequency
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Pending
Application number
CN202310787490.3A
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Chinese (zh)
Inventor
谢婷婷
邱良
周德杭
倪文海
徐文华
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Canaantek Co ltd
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Canaantek Co ltd
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Priority to CN202310787490.3A priority Critical patent/CN116846347A/en
Publication of CN116846347A publication Critical patent/CN116846347A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/42—Modifications of amplifiers to extend the bandwidth
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H03F1/565—Modifications of input or output impedances, not otherwise provided for using inductive elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H03F3/193—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only with field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/36—Indexing scheme relating to amplifiers the amplifier comprising means for increasing the bandwidth
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

The application discloses a radio frequency LNA bandwidth expanding device and a low noise amplifier, which belong to the technical field of signal processing, wherein the radio frequency LNA bandwidth expanding device comprises: the adjustable inductance module and the cascode module; the output end of the cascode module is connected with the input end of the adjustable inductance module; the output end of the cascode module is connected with a first capacitor array module; the output end of the adjustable inductance module is also connected with a second capacitance array module. The device can enable the peak point of the output impedance curve to be switched in different frequency bands by changing the working states of the first capacitor array module, the second capacitor array module and the adjustable inductance module in the circuit, so that the LMB, MB and HB performances can be optimized at the same time, and the application scene of the LNA is expanded.

Description

Radio frequency LNA bandwidth expanding device and low noise amplifier
Technical Field
The application belongs to the technical field of signal processing, and particularly relates to a radio frequency LNA bandwidth expanding device and a low-noise amplifier.
Background
LNA (low noise amplifier) refers to an amplifier with a very low noise figure. Are commonly used as high-frequency or intermediate-frequency preamplifiers for various radio receivers, and as amplification circuits for high-sensitivity electronic detection devices.
The ultra-wideband technology is a novel wireless communication technology, and by directly modulating impulse pulses with steep rising and falling time, signals have bandwidth of GHz magnitude, and the ultra-wideband technology solves the serious problems of the traditional wireless technology in the aspect of propagation, and has the advantages of insensitivity to channel fading, low power spectrum density, low interception capability, low system complexity, capability of providing positioning accuracy of a plurality of centimeters and the like. However, the output matching coverage of ultra wideband LNAs is small.
Disclosure of Invention
The application aims to provide a radio frequency LNA bandwidth expanding device and a low noise amplifier so as to improve the output matching coverage range of an LNA.
According to a first aspect of an embodiment of the present application, there is provided a radio-frequency LNA bandwidth extension apparatus, including: the adjustable inductance module and the cascode module;
the output end of the cascode module is connected with the input end of the adjustable inductance module;
the output end of the cascode module is connected with a first capacitor array module;
the output end of the adjustable inductance module is also connected with a second capacitance array module.
In some optional embodiments of the application, the first capacitive array module comprises a first switch combination unit and a second switch combination unit;
the first switch combination unit and the second switch combination unit are both arranged at the output end of the cascode module.
In some optional embodiments of the application, the first switch combination unit comprises a first capacitor and a first switch;
one end of the first capacitor is connected with the output end of the cascode module, the other end of the first capacitor is connected with one end of the first switch, and the other end of the first switch is grounded.
In some optional embodiments of the application, the second switch combination unit comprises a second capacitor and a second switch;
one end of the second capacitor is connected with the output end of the cascode module, the other end of the second capacitor is connected with one end of the second switch, and the other end of the second switch is grounded.
In some optional embodiments of the application, the radio frequency LNA bandwidth extension device further comprises: a matching module;
the second capacitor array module comprises a third switch combination unit and a fourth switch combination unit;
the third switch combination unit and the fourth switch combination unit are connected with the matching module in parallel.
In some optional embodiments of the application, the third switch combination unit comprises a third capacitor and a third switch;
one end of the third capacitor is connected with the input end of the matching module, the other end of the third capacitor is connected with one end of the third switch, and the other end of the third switch is connected with the output end of the matching module.
In some optional embodiments of the application, the fourth switching combination unit comprises a fourth capacitor and a fourth switch;
one end of the fourth capacitor is connected with the input end of the matching module, the other end of the fourth capacitor is connected with one end of the fourth switch, and the other end of the fourth switch is connected with the output end of the matching module.
In some optional embodiments of the application, the radio frequency LNA bandwidth extension device further comprises: an attenuation module;
the attenuation module is connected with the output end of the matching module.
In some alternative embodiments of the application, the adjustable inductance module comprises: the first inductor, the second inductor and the fifth switch;
one end of the first inductor is connected with a power supply, the other end of the first inductor is connected with one end of the second inductor, and the other end of the second inductor is connected with the output end of the cascode module;
the fifth switch is connected in parallel with the second inductor.
According to a second aspect of an embodiment of the present application, there is provided a low noise amplifier including: the radio frequency LNA bandwidth extension device of any one of the first aspects of the embodiments.
The technical scheme of the application has the following beneficial technical effects:
according to the device provided by the embodiment of the application, the working states of the first capacitor array module, the second capacitor array module and the adjustable inductance module in the circuit are changed, so that the peak points of the output impedance curves are switched in different frequency bands, the LMB, MB and HB performances can be simultaneously optimized, and the application scene of the LNA is expanded.
Drawings
FIG. 1 is a schematic diagram of a radio frequency LNA bandwidth extension device in accordance with an exemplary embodiment of the application;
fig. 2 is a schematic structural diagram of a bandwidth expanding device of a radio-frequency LNA according to an embodiment of the present application.
Reference numerals:
l1: a first inductance; l2: a second inductor; c1: a first capacitor; c2: a second capacitor; and C3: a third capacitor; and C4: a fourth capacitor; SW1: a first switch; SW2: a second switch; SW3: a third switch; SW4: a fourth switch; SW5: a fifth switch; match: a matching module; ATT: an attenuation module; m1: a first MOS tube; m2: and a second MOS tube.
Detailed Description
The objects, technical solutions and advantages of the present application will become more apparent by the following detailed description of the present application with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the application. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present application.
A layer structure schematic diagram according to an embodiment of the present application is shown in the drawings. The figures are not drawn to scale, wherein certain details may be exaggerated and some details may be omitted for clarity. The shapes of the various regions, layers and relative sizes, positional relationships between them shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
It will be apparent that the described embodiments are some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features of the different embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
The radio frequency LNA bandwidth expanding device and the low noise amplifier provided by the embodiment of the application are described in detail through specific embodiments and application scenes thereof with reference to the accompanying drawings.
As shown in fig. 1, in a first aspect of the embodiment of the present application, there is provided a radio-frequency LNA bandwidth expanding apparatus, including: the adjustable inductance module and the cascode module;
the output end of the cascode module is connected with the input end of the adjustable inductance module;
the output end of the cascode module is connected with a first capacitor array module;
the output end of the adjustable inductance module is also connected with a second capacitance array module.
According to the device, through changing the working states of the first capacitor array module, the second capacitor array module and the adjustable inductance module in the circuit, the peak points of the output impedance curves are switched in different frequency bands, so that the LMB, MB and HB performances can be optimized at the same time, and the application scene of the LNA is expanded.
Wherein, LMB is medium-low frequency 1.4-1.6GHz, MB is medium frequency 1.8-2.2GHz, HB is high frequency 2.3-2.7GHz.
In this embodiment, the cascode module includes a first MOS transistor M1 and a second MOS transistor M2; the D pole of the first MOS tube M1 is connected with the adjustable inductance module, the S pole of the first MOS tube M1 is connected with the D pole of the second MOS tube M2, and the S pole of the second MOS tube M2 is grounded through an inductance.
In some embodiments, the first capacitive array module includes a first switch combination unit and a second switch combination unit;
the first switch combination unit and the second switch combination unit are both arranged at the output end of the cascode module.
In some embodiments, the first switch combination unit includes a first capacitor C1 and a first switch SW1;
one end of the first capacitor C1 is connected with the output end of the cascode module, the other end of the first capacitor C1 is connected with one end of the first switch SW1, and the other end of the first switch SW1 is grounded.
In some embodiments, the second switch combination unit includes a second capacitor C2 and a second switch SW2;
one end of the second capacitor C2 is connected with the output end of the cascode module, the other end of the second capacitor C2 is connected with one end of the second switch SW2, and the other end of the second switch SW2 is grounded.
In some embodiments, the radio frequency LNA bandwidth extension device further comprises: matching module Match;
the second capacitor array module comprises a third switch combination unit and a fourth switch combination unit;
the third switch combination unit and the fourth switch combination unit are connected in parallel with the matching module Match.
In some embodiments, the third switch combination unit includes a third capacitor C3 and a third switch SW3;
one end of a third capacitor C3 is connected with the input end of the matching module Match, the other end of the third capacitor C3 is connected with one end of a third switch SW3, and the other end of the third switch SW3 is connected with the output end of the matching module Match.
In some embodiments, the fourth switching combination unit includes a fourth capacitor C4 and a fourth switch SW4;
one end of a fourth capacitor C4 is connected with the input end of the matching module Match, the other end of the fourth capacitor C4 is connected with one end of a fourth switch SW4, and the other end of the fourth switch SW4 is connected with the output end of the matching module Match.
In some embodiments, the radio frequency LNA bandwidth extension device further comprises: an attenuation module ATT;
the attenuation module is connected with the output end of the matching module.
In this embodiment, the attenuation module ATT is configured to attenuate the power gain, and implement different gain gears with different attenuation values; the matching module Match is used for matching the output of the low noise amplifier in a required working frequency band to obtain the optimal output gain and matching performance.
In some embodiments, the adjustable inductance module comprises: a first inductor L1, a second inductor L2, and a fifth switch SW5;
one end of the first inductor L1 is connected with a power supply, the other end of the first inductor L1 is connected with one end of the second inductor L2, and the other end of the second inductor L2 is connected with the output end of the cascode module;
the fifth switch SW5 is connected in parallel with the second inductor L2.
As shown in fig. 2, in a specific embodiment, a radio-frequency LNA bandwidth extension apparatus is provided, where the radio-frequency LNA bandwidth extension apparatus includes: the device comprises an adjustable inductance module, a cascode module, a matching module Match and an attenuation module ATT;
the output end of the cascode module is connected with the input end of the adjustable inductance module;
the output end of the cascode module is connected with a first capacitor array module;
the output end of the adjustable inductance module is also connected with a second capacitance array module;
the attenuation module ATT is connected with the output end of the matching module Match.
The first capacitor array module comprises a first switch combination unit and a second switch combination unit; the first switch combination unit and the second switch combination unit are both arranged at the output end of the cascode module.
The first switch combination unit comprises a first capacitor C1 and a first switch SW1; one end of the first capacitor C1 is connected with the output end of the cascode module, the other end of the first capacitor C1 is connected with one end of the first switch SW1, and the other end of the first switch SW1 is grounded.
The second switch combination unit comprises a second capacitor C2 and a second switch SW2; one end of the second capacitor C2 is connected with the output end of the cascode module, the other end of the second capacitor C2 is connected with one end of the second switch SW2, and the other end of the second switch SW2 is grounded.
The second capacitor array module comprises a third switch combination unit and a fourth switch combination unit; the third switch combination unit and the fourth switch combination unit are connected in parallel with the matching module Match.
The third switch combination unit comprises a third capacitor C3 and a third switch SW3; one end of a third capacitor C3 is connected with the input end of the matching module Match, the other end of the third capacitor C3 is connected with one end of a third switch SW3, and the other end of the third switch SW3 is connected with the output end of the matching module Match.
The fourth switch combination unit comprises a fourth capacitor C4 and a fourth switch SW4; one end of a fourth capacitor C4 is connected with the input end of the matching module Match, the other end of the fourth capacitor C4 is connected with one end of a fourth switch SW4, and the other end of the fourth switch SW4 is connected with the output end of the matching module Match.
Wherein, adjustable inductance module includes: a first inductor L1, a second inductor L2, and a fifth switch SW5; one end of the first inductor L1 is connected with a power supply, the other end of the first inductor L1 is connected with one end of the second inductor L2, and the other end of the second inductor L2 is connected with the output end of the cascode module; the fifth switch SW5 is connected in parallel with the second inductor L2.
In fig. 2, ls is a source inductance, which is used for improving input matching and stability, and Cin is mainly used for performing input matching, and has both return loss and noise performance.
The first inductor L1, the second inductor L2 and the fifth switch SW5 form an adjustable inductor module; the first capacitor C1, the first switch SW1, the second capacitor C2 and the second switch SW2 form an output which is connected to the ground capacitor array in parallel; the third capacitor C3, the third switch SW3, the fourth capacitor C4 and the fourth switch SW4 form an output series branch capacitor array. When the first switch SW1, the second switch SW2, the third switch SW3 and the fourth switch SW4 are turned off and the fifth switch SW5 is turned on, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4 and the second inductor L2 are all not operated, only the first inductor L1 is operated, and the circuit is operated in the HB range (i.e., 2.3-2.7 GHz); when the first switch SW1, the third switch SW3 and the fifth switch SW5 are turned on, the second switch SW2 and the fourth switch SW4 are turned off, the second capacitor C2, the fourth capacitor C4 and the second inductor L2 do not work, the first capacitor C1, the third capacitor C3 and the first inductor L1 work, and the circuit works in the MB range (i.e. 1.8-2.2 GHz); when the first switch SW1, the second switch SW2, the third switch SW3 and the fourth switch SW4 are turned on and the fifth switch SW5 is turned off, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the first inductor L1 and the second inductor L2 work, and the circuit works in the LMB range (i.e. 1.4-1.6 GHz).
For example, the first inductance L1 may be 3.1n, the second inductance L2 may be 1n, the first capacitance C1 may be 0.6pF, the second capacitance C2 may be 0.4pF, the third capacitance C3 may be 0.5pF, and the fourth capacitance C4 may be 0.8pF.
The device can control the capacitance and inductance to be in different working states through the register, change the peak point of output impedance, and adjust the value of the off-chip input matching inductance Lg at the same time, so that the output matching is compatible with LMB, MB and HB at the same time, the radio frequency performance of the LMB, MB and HB can be optimized at the same time, and the application scene of the product is expanded.
In a second aspect of the embodiments of the present application, there is provided a low noise amplifier including: the radio frequency LNA bandwidth extension device of any one of the first aspects of the embodiments.
For convenience and brevity of description, the specific system structure of the low noise amplifier described above may refer to the corresponding description in the foregoing embodiment of the radio frequency LNA bandwidth extension device, and the technical problem and the achieved technical effect that the radio frequency LNA bandwidth extension device solves may also be implemented, which is not described herein again.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
It should be noted that the present application only aims at protecting the connection relationship between each module in the communication system, and the content of the processing and analyzing method specifically relates to the implementation of the prior art, which is not included in the protection of the present application.

Claims (10)

1. A radio frequency LNA bandwidth extension apparatus, comprising: the adjustable inductance module and the cascode module;
the output end of the cascode module is connected with the input end of the adjustable inductance module;
the output end of the cascode module is connected with a first capacitor array module;
the output end of the adjustable inductance module is also connected with a second capacitance array module.
2. The radio frequency LNA bandwidth extension device according to claim 1, wherein the first capacitor array module comprises a first switch combination unit and a second switch combination unit;
the first switch combination unit and the second switch combination unit are both arranged at the output end of the cascode module.
3. The radio frequency LNA bandwidth extension device according to claim 2, wherein the first switch combination unit comprises a first capacitor and a first switch;
one end of the first capacitor is connected with the output end of the cascode module, the other end of the first capacitor is connected with one end of the first switch, and the other end of the first switch is grounded.
4. The radio frequency LNA bandwidth extension device according to claim 2, wherein the second switch combination unit comprises a second capacitor and a second switch;
one end of the second capacitor is connected with the output end of the cascode module, the other end of the second capacitor is connected with one end of the second switch, and the other end of the second switch is grounded.
5. The radio frequency LNA bandwidth extension device of claim 1, further comprising: a matching module;
the second capacitor array module comprises a third switch combination unit and a fourth switch combination unit;
and the third switch combination unit and the fourth switch combination unit are connected with the matching module in parallel.
6. The apparatus of claim 5, wherein the third switch combination unit comprises a third capacitor and a third switch;
one end of the third capacitor is connected with the input end of the matching module, the other end of the third capacitor is connected with one end of the third switch, and the other end of the third switch is connected with the output end of the matching module.
7. The apparatus of claim 5, wherein the fourth switch combination unit comprises a fourth capacitor and a fourth switch;
one end of the fourth capacitor is connected with the input end of the matching module, the other end of the fourth capacitor is connected with one end of the fourth switch, and the other end of the fourth switch is connected with the output end of the matching module.
8. The radio frequency LNA bandwidth extension device according to claim 5, further comprising: an attenuation module;
the attenuation module is connected with the output end of the matching module.
9. The radio frequency LNA bandwidth extension device of any one of claims 1 to 8, wherein the adjustable inductance module comprises: the first inductor, the second inductor and the fifth switch;
one end of the first inductor is connected with a power supply, the other end of the first inductor is connected with one end of the second inductor, and the other end of the second inductor is connected with the output end of the cascode module;
the fifth switch is connected in parallel with the second inductor.
10. A low noise amplifier, comprising: the radio frequency LNA bandwidth extension device of any one of claims 1 to 9.
CN202310787490.3A 2023-06-29 2023-06-29 Radio frequency LNA bandwidth expanding device and low noise amplifier Pending CN116846347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310787490.3A CN116846347A (en) 2023-06-29 2023-06-29 Radio frequency LNA bandwidth expanding device and low noise amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310787490.3A CN116846347A (en) 2023-06-29 2023-06-29 Radio frequency LNA bandwidth expanding device and low noise amplifier

Publications (1)

Publication Number Publication Date
CN116846347A true CN116846347A (en) 2023-10-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310787490.3A Pending CN116846347A (en) 2023-06-29 2023-06-29 Radio frequency LNA bandwidth expanding device and low noise amplifier

Country Status (1)

Country Link
CN (1) CN116846347A (en)

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