CN106911318B - High-frequency broadband high-gain filter bank - Google Patents
High-frequency broadband high-gain filter bank Download PDFInfo
- Publication number
- CN106911318B CN106911318B CN201710131850.9A CN201710131850A CN106911318B CN 106911318 B CN106911318 B CN 106911318B CN 201710131850 A CN201710131850 A CN 201710131850A CN 106911318 B CN106911318 B CN 106911318B
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- radio frequency
- impedance matcher
- frequency switch
- filter
- narrow
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/28—Impedance matching networks
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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
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
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- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/34—Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source
-
- 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
Abstract
The invention discloses a high-frequency broadband high-gain filter bank, which comprises an impedance matcher, a radio frequency switch, an equalizer, a radio frequency amplifier, a broadband filter and a plurality of narrow-band filters, wherein the impedance matcher is connected with the radio frequency switch; wherein, impedance matcher and radio frequency switch are two: the system comprises an impedance matcher I, an impedance matcher II, a radio frequency switch I and a radio frequency switch II; the impedance matcher I is connected with a radio frequency switch I, the radio frequency switch I is simultaneously connected with signal input ends of a broadband filter and a plurality of narrow-band filters, and signal output ends of the broadband filter and the narrow-band filters are simultaneously connected with a radio frequency switch II; and the radio frequency switch II is connected with the radio frequency amplifier after passing through the impedance matcher II, and the equalizer is arranged between the impedance matcher II and the radio frequency amplifier. The invention can ensure that the amplitude in the pass band of a single filtering channel is flat, and simultaneously ensures the amplitude consistency of each filtering channel.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a high-frequency broadband high-gain filter bank.
Background
As communication technologies develop, high frequency broadband internal communication is required. This requires broadening the operating band of the filter bank without affecting the performance of the individual filters; due to the complexity of the operating electromagnetic environment, interference often occurs in the wideband channel, requiring the wideband to be further divided into several narrow bands in order to filter out the various interfering signals. This requires that the filter bank use a combination of a wide-band filter and several narrow-band filters. When the communication system processes signals of all channels, the amplitudes of all channels are required to be consistent, and therefore corresponding requirements are provided for the amplitude consistency of all channels of the high-frequency broadband high-gain filter bank. Meanwhile, because the detection signal is weak, the signal amplitude needs to be amplified for further processing.
The gain of the rf amplifier generally decreases with increasing frequency, as shown in fig. 1. The wideband filter loss is substantially constant over the passband frequency range, as shown in fig. 2. The center frequencies of the multiple narrow-band filters are different, but the losses are basically the same, as shown in fig. 3.
In a communication system, an amplifier and a high frequency broadband high gain filter bank are present in series. This leads to the following two problems:
1. the amplitude of the wideband filter channel rolls off with frequency (see fig. 4), and the pass band performance does not meet the system requirements.
2. The amplitude of the channel with relatively low frequency in the multi-channel narrow-band filtering channels is larger, the amplitude of the channel with relatively high frequency is smaller (as shown in fig. 5), and the amplitude consistency of all the channels does not meet the system requirement.
Disclosure of Invention
In view of the above-mentioned shortcomings in the prior art, the present invention provides a high-frequency broadband high-gain filter bank, which can make the amplitude in the pass band of a single filter channel flat and ensure the amplitude consistency of each filter channel.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows: a high frequency wideband high gain filter bank, characterized by: the radio frequency filter comprises an impedance matcher, a radio frequency switch, an equalizer, a radio frequency amplifier, a broadband filter and a plurality of narrow-band filters; wherein, impedance matcher and radio frequency switch are two: the system comprises an impedance matcher I, an impedance matcher II, a radio frequency switch I and a radio frequency switch II; the impedance matcher I is connected with a radio frequency switch I, the radio frequency switch I is simultaneously connected with signal input ends of a broadband filter and a plurality of narrow-band filters, and signal output ends of the broadband filter and the narrow-band filters are simultaneously connected with a radio frequency switch II; and the radio frequency switch II is connected with the radio frequency amplifier after passing through the impedance matcher II, and the equalizer is arranged between the impedance matcher II and the radio frequency amplifier.
Further, the equalizer comprises a resistor R, a capacitor C and an inductor L, wherein one end of the resistor R is connected between the impedance matcher II and the radio frequency amplifier, the other end of the resistor R is simultaneously connected with one ends of the capacitor C and the inductor L, and the other ends of the capacitor C and the inductor L are grounded.
Further, the amplitude slope of the equalizer is opposite to the gain slope of the radio frequency amplifier.
Compared with the prior art, the invention has the following advantages: the filter bank has a simple structure, realizes amplitude control of the high-bandwidth high-gain filter bank, and ensures flat passband amplitude of the broadband filter and passband amplitude consistency of each filter.
Drawings
Fig. 1 is a graph of gain versus frequency for a prior art rf amplifier.
Fig. 2 is a graph of passband frequency versus wideband filter loss in the prior art.
Fig. 3 is a graph showing the relationship between the center frequency and the loss of a multi-channel narrow-band filter in the prior art.
Fig. 4 is a graph of prior art wideband filter channel amplitude versus frequency.
Fig. 5 is a graph of amplitude versus frequency for multiple narrowband filtered channels in the prior art.
Fig. 6 is a schematic block diagram of the circuit of the present invention.
FIG. 7 is a graph of the output of the wideband filter channel of the present invention.
Fig. 8 is a graph of the output of multiple narrow band filters of the present invention.
Fig. 9 is a schematic circuit diagram of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
Example (b): referring to fig. 6-9, a high-frequency broadband high-gain filter bank includes an impedance matcher, a radio frequency switcher, an equalizer, a radio frequency amplifier, and a broadband filter and a plurality of narrowband filters (narrowband filter 1, narrowband filter 2 … …, narrowband filter n); wherein, impedance matcher and radio frequency switch are two: the system comprises an impedance matcher I, an impedance matcher II, a radio frequency switch I and a radio frequency switch II.
The impedance matcher I is connected with a radio frequency switch I, the radio frequency switch I is simultaneously connected with signal input ends of a broadband filter and a plurality of narrow-band filters, and signal output ends of the broadband filter and the narrow-band filters are simultaneously connected with a radio frequency switch II; and the radio frequency switch II is connected with the radio frequency amplifier after passing through the impedance matcher II, and the equalizer is arranged between the impedance matcher II and the radio frequency amplifier.
The amplitude slope of the equalizer is opposite to the gain slope of the radio frequency amplifier; the amplitude in the pass band of a single filtering channel is flat, and meanwhile, the amplitude consistency of all the filtering channels is guaranteed. The equalizer comprises a resistor R, a capacitor C and an inductor L, wherein one end of the resistor R is connected between the impedance matcher II and the radio frequency amplifier, the other end of the resistor R is simultaneously connected with one ends of the capacitor C and the inductor L, and the other ends of the capacitor C and the inductor L are grounded. The balance degree of the circuit, and the balance frequency range of the circuit can be set by the inductance and the capacitance through the resistance.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.
Claims (1)
1. A high frequency wideband high gain filter bank, characterized by: the radio frequency filter comprises an impedance matcher, a radio frequency switch, an equalizer, a radio frequency amplifier, a broadband filter and a plurality of narrow-band filters; wherein, impedance matcher and radio frequency switch are two: the system comprises an impedance matcher I, an impedance matcher II, a radio frequency switch I and a radio frequency switch II; the impedance matcher I is connected with a radio frequency switch I, the radio frequency switch I is simultaneously connected with signal input ends of a broadband filter and a plurality of narrow-band filters, and signal output ends of the broadband filter and the narrow-band filters are simultaneously connected with a radio frequency switch II; the radio frequency switch II is connected with the radio frequency amplifier after passing through the impedance matcher II, and the equalizer is arranged between the impedance matcher II and the radio frequency amplifier;
the equalizer comprises a resistor R, a capacitor C and an inductor L, wherein one end of the resistor R is connected between the impedance matcher II and the radio frequency amplifier, the other end of the resistor R is simultaneously connected with one ends of the capacitor C and the inductor L, and the other ends of the capacitor C and the inductor L are grounded; the amplitude slope of the equalizer is opposite to the gain slope of the radio frequency amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710131850.9A CN106911318B (en) | 2017-03-07 | 2017-03-07 | High-frequency broadband high-gain filter bank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710131850.9A CN106911318B (en) | 2017-03-07 | 2017-03-07 | High-frequency broadband high-gain filter bank |
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| Publication Number | Publication Date |
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| CN106911318A CN106911318A (en) | 2017-06-30 |
| CN106911318B true CN106911318B (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710131850.9A Active CN106911318B (en) | 2017-03-07 | 2017-03-07 | High-frequency broadband high-gain filter bank |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842380A (en) * | 2017-11-28 | 2019-06-04 | 锐迪科微电子（上海）有限公司 | A kind of power amplification circuit for realizing HPUE |
| CN117040551B (en) * | 2023-08-04 | 2024-04-12 | 中国电子科技集团公司第二十六研究所 | Radio frequency front end anti-interference filtering segmentation method, electronic equipment and radio frequency front end module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002017495A2 (en) * | 2000-08-23 | 2002-02-28 | Hrl Laboratories, Llc | Multiple mode analog-to-digital converter employing a single quantizer |
| CN103546173A (en) * | 2012-07-11 | 2014-01-29 | 中兴通讯股份有限公司 | Broadband receiver, anti-interference filter circuit of broadband receiver and implementation method of anti-interference filter circuit |
| CN203574646U (en) * | 2013-10-28 | 2014-04-30 | 国家电网公司 | Cross-frequency-band power-line carrier communication system |
| CN104320104A (en) * | 2014-10-25 | 2015-01-28 | 中国电子科技集团公司第二十六研究所 | Surface acoustic wave filter assembly shared by transmitting channel and receiving channel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI319291B (en) * | 2006-07-25 | 2010-01-01 | Novatek Microelectronics Corp | Self-adaptive image processing device and method |
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- 2017-03-07 CN CN201710131850.9A patent/CN106911318B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002017495A2 (en) * | 2000-08-23 | 2002-02-28 | Hrl Laboratories, Llc | Multiple mode analog-to-digital converter employing a single quantizer |
| CN103546173A (en) * | 2012-07-11 | 2014-01-29 | 中兴通讯股份有限公司 | Broadband receiver, anti-interference filter circuit of broadband receiver and implementation method of anti-interference filter circuit |
| CN203574646U (en) * | 2013-10-28 | 2014-04-30 | 国家电网公司 | Cross-frequency-band power-line carrier communication system |
| CN104320104A (en) * | 2014-10-25 | 2015-01-28 | 中国电子科技集团公司第二十六研究所 | Surface acoustic wave filter assembly shared by transmitting channel and receiving channel |
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| CN106911318A (en) | 2017-06-30 |
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