CN205265632U - Take cavity filter's low noise amplification circuit of output feed - Google Patents
Take cavity filter's low noise amplification circuit of output feed Download PDFInfo
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- CN205265632U CN205265632U CN201521108529.1U CN201521108529U CN205265632U CN 205265632 U CN205265632 U CN 205265632U CN 201521108529 U CN201521108529 U CN 201521108529U CN 205265632 U CN205265632 U CN 205265632U
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Abstract
The utility model relates to the field of communication technology, especially, relate to a take cavity filter's low noise amplification circuit of output feed. The utility model discloses problem to prior art exists provides one kind low noise amplification circuit. Using two -sided integrated manner, placing 4 low -noise amplifier and peripheral device on the two sides of printing board, low -noise amplifier selects the minimum integrated low -noise amplifier of encapsulation, and little wrapper spare is chooseed for use to direct current feed module for whole low -noise amplifier bulk reduction. The utility model discloses filtering amplification unit, temperature compensation amplifying unit, the welding of direct current feed unit are on the printing board, the printing board is placed in the cavity, the filtering amplification unit input passes through cavity filter and is connected with temperature compensation amplifying unit input as radio frequency input, filtering amplification unit output, temperature compensation amplifying unit output is the radio frequency output, direct current feed unit power supply signal passes through the radio frequency output and is connected with filtering amplification unit, temperature compensation amplifying unit.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of output feed low noise amplifier circuit of attached cavity wave filter.
Background technology
In existing design, adopt low-noise amplifier to carry out signal amplification, but because low-noise amplifier adopts the integrated mode of one side mostly, the volume of the low-noise amplifier of design is large, cost is high, realizes complicated; Further, due to the mode that low-noise amplifier adopts single-stage to amplify mostly, most of low-noise amplifier index is good not, and noise is large, gains low, and return loss is large; Finally, because noise is large, gain low, return loss is large, causes in communication system, can not effectively extract useful signal, and systematic function is poor.
Utility model content
Technical problem to be solved in the utility model is: for the problem of prior art existence, provide a kind of output feed low noise amplifier circuit of attached cavity wave filter. The output feed low noise amplifier circuit of attached cavity wave filter of the present invention, use two-sided integration mode, 4 low-noise amplifiers and peripheral components are placed on to the two sides of printed board, low-noise amplifier is selected the minimum integrated low-noise amplifier of encapsulation, DC feedback module is selected little packaging, and whole low-noise amplifier volume is reduced. Adopt four laminates simultaneously, make the ground connection of low-noise amplifier good. By cavity body filter milling on product cavity, the complicated procedures of forming while reducing the assembling of each parts. In addition, radio frequency output is integrated into radio frequency output port with power interface, reduces port number, practical.
The technical solution adopted in the utility model is as follows:
A kind of output feed low noise amplifier circuit of attached cavity wave filter comprises cavity body filter, filter and amplification unit, temperature compensation amplifying unit, DC feedback unit; Cavity body filter passes through the direct milling of mode of machining on cavity; Filter and amplification unit, temperature compensation amplifying unit, DC feedback element solder are in printed board; Printed board is placed in cavity; Filter and amplification unit input is as rf inputs, and filter and amplification unit output is connected with temperature compensation amplifying unit input by cavity body filter; Temperature compensation amplifying unit output is RF output end; DC feedback unit power supply signal is connected with filter and amplification unit, temperature compensation amplifying unit by RF output end.
Further, described filter and amplification unit comprises prefilter, the first low noise amplification unit and the second low noise amplification unit, described prefilter one end, the first low noise amplification unit, the second low noise amplification unit connect successively, and the second low-noise amplifier output is connected with cavity body filter;
Further, described prefilter comprises preposition electric capacity and dielectric filter; Preposition electric capacity one end is as RF signal input end, and the preposition electric capacity other end is connected with dielectric filter input, and dielectric filter output is connected with the first low noise amplification unit input;
Described the first low noise amplification unit comprises the first capacitance, the first coupling inductance and the first low-noise amplifier; First capacitance one end is as the first noise amplifying unit input; Described dielectric filter output is connected with the first low-noise amplifier input by the first capacitance, the first coupling inductance successively; The first low-noise amplifier output is connected with the second low noise amplification unit input;
The second low noise amplification unit comprises the second capacitance, the second coupling inductance, the second low-noise amplifier and the 3rd capacitance; Second capacitance one end is as the second low noise amplification unit input; Described the first low-noise amplifier output is connected with the second low-noise amplifier input by the second capacitance, the second coupling inductance successively; The second low-noise amplifier output is connected with cavity body filter by the 3rd capacitance.
Further, described temperature compensation amplifying unit comprises the 3rd low noise amplification unit, temperature compensation attenuator and the 4th low noise amplification unit; Described cavity body filter output, the 3rd low noise amplification unit, temperature compensation attenuator, the 4th low noise amplification unit connect successively; The 4th low noise amplification unit output is as RF output end;
Further, described the 3rd low noise amplification unit comprises the 4th capacitance, the 3rd coupling inductance and the 3rd low-noise amplifier; The 4th capacitance one end is as temperature compensation amplifying unit input; Cavity body filter output is connected with the 4th capacitance one end; The 4th capacitance other end is connected with the 3rd low-noise amplifier input by the 3rd coupling inductance; The 3rd low-noise amplifier output is connected with the 4th low noise amplification unit input by temperature compensation attenuator;
The 4th low noise amplification unit comprises the 5th capacitance, the 4th coupling inductance and the 4th low-noise amplifier; The 4th coupling inductance one end is as the 4th low noise amplification unit input; The 4th coupling inductance other end is connected with the 4th low-noise amplifier input by the 5th capacitance; The 4th low noise amplifier output connects by the 6th capacitance one end, and the 6th capacitance other end is as RF output end.
Further, described DC feedback unit comprises filter and amplification unit power feeding module and temperature compensation amplifying unit power feeding module; Filter and amplification unit power feeding module comprises the first divider resistance, the first filter capacitor, the second filter capacitor, the 3rd filter capacitor, the 4th filter capacitor, the first feed inductance and the second feed inductance; First filter capacitor one end is connected with first feed inductance one end, the second low-noise amplifier power end; The first feed inductance other end, second filter capacitor one end, the 3rd filter capacitor one end, first divider resistance one end and temperature compensation amplifying unit power feeding module divide pressure side concurrent to connect; The first divider resistance other end is connected with the first low-noise amplifier power end by the second feed inductance; The first filter capacitor other end, the second filter capacitor other end, the 3rd filter capacitor other end, the 4th filter capacitor other end ground connection;
Temperature compensation amplifying unit power feeding module comprises dc source, the second divider resistance, the 3rd divider resistance, the 5th filter capacitor, the 6th filter capacitor, the 7th filter capacitor, the 3rd feed inductance, the 4th feed inductance and the 5th feed inductance; Dc source is connected with the 6th capacitance other end, the 3rd feed inductance one end; The 3rd feed inductance other end, the 5th filter capacitor one end, second divider resistance one end, the 3rd divider resistance one end concurrent connect; The second divider resistance other end is connected with the 4th feed inductance one end, the 6th filter capacitor; The 4th feed inductance other end is connected with the 4th low-noise amplifier power end; The 3rd divider resistance other end is connected with the 3rd low-noise amplifier power end, the 7th filter capacitor one end by the 5th feed inductance; The 5th filter capacitor other end, the 6th filter capacitor other end, the 7th filter capacitor other end ground connection; The 3rd divider resistance other end divides pressure side as temperature compensation amplifying unit power feeding module.
Further, described printed board is used 4 laminates, and top layer printed board and bottom printed board thickness are 0.3mm, and dielectric constant is 3.48, and middle two layers of thickness is 0.4mm altogether, and dielectric constant is 4.6.
Further, described the first low-noise amplifier, the second low-noise amplifier, the 3rd low-noise amplifier and the 4th low-noise amplifier frequency range 2492MHz ± 5MHz, gain reaches 30dB, and noise is less than 1.4, and input and output standing-wave ratio is all less than 1.5.
Further, described filter and amplification unit, temperature compensation amplifying unit are connected with cavity body filter by silver-coated copper wire respectively; On described silver-coated copper wire, be socketed by the heat-shrink tube that prevents silver-coated copper wire ground connection.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
The utility model uses two-sided integration mode, the components and parts of amplifier is welded on to the two sides of printed board, selects little packaging, and whole low-noise amplifier volume is reduced. Adopt four laminates simultaneously, make the ground connection of low-noise amplifier good.
Principle of the present invention is by low-noise amplifier cascade, wave filter filtering interference signals, and inhibition zone external signal, in fixed frequency range, realizes high-gain, low noise object.
The utility model, by integrated four low-noise amplifiers of two-sided difference, makes four low-noise amplifier cascades, wave filter filtering interference signals, and inhibition zone external signal, in fixed frequency range, realizes high-gain, low noise object.
Brief description of the drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is filter and amplification unit and filter and amplification unit power feeding module schematic diagram。
Fig. 2 is temperature compensation amplifying unit and temperature compensation amplifying unit power feeding module schematic diagram.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
This device related description:
1, the first low-noise amplifier U2 power end refers to first low-noise amplifier the second port and the first low-noise amplifier the 6th port; For powering to low-noise amplifier. The first low-noise amplifier U2 five-port input radio frequency signal; The first low-noise amplifier the 3rd port is as output, for exporting radiofrequency signal; First low-noise amplifier the first port and the 4th port ground connection; The second low-noise amplifier is identical with the first low-noise amplifier port.
2, dielectric filter (UBE2492) is in order to filtering interference signals; The first port is input port, for input radio frequency signal; Dielectric filter the second port is output, for exporting radiofrequency signal; Dielectric filter the 3rd port is earth terminal.
3, low-noise amplifier U2, U3, U4, U6 its act as amplification radiofrequency signal, less noise coefficient and larger gain are provided, its second port, the 6th port are all power ends; Five-port is input, and the 3rd port is output, the first port, the 4th port ground connection. Data are from five-port input, then from the 3rd port output.
4, the direct milling of mode that cavity body filter passes through machining is on cavity;
5, temperature compensation attenuator U5 input port fan-in certificate, output port output data, for reducing the impact of temperature for product.
One, this device comprises:
Comprise cavity body filter, filter and amplification unit, temperature compensation amplifying unit, DC feedback unit; Cavity body filter passes through the direct milling of mode of machining on cavity; Filter and amplification unit, temperature compensation amplifying unit, DC feedback element solder are in printed board; Printed board is placed in cavity; Filter and amplification unit input is as rf inputs, and filter and amplification unit output is connected with temperature compensation amplifying unit input by cavity body filter; Temperature compensation amplifying unit output is RF output end; DC feedback unit power supply signal is connected with filter and amplification unit, temperature compensation amplifying unit by RF output end.
Wherein said filter and amplification unit comprises prefilter, the first low noise amplification unit, the second low noise amplification unit, described prefilter one end, the first low noise amplification unit, the second low noise amplification unit connect successively, and the second low-noise amplifier output is connected with cavity body filter;
Wherein said prefilter comprises preposition capacitor C 1 and dielectric filter U1; Preposition electric capacity one end is as RF signal input end, and the preposition electric capacity other end is connected with dielectric filter input, and dielectric filter output is connected with the first low noise amplification unit input;
Described the first low noise amplification unit comprises the first capacitance C2, the first coupling inductance L1 and the first low-noise amplifier U2; First capacitance one end is as the first noise amplifying unit input; Described dielectric filter output is connected with the first low-noise amplifier input by the first capacitance, the first coupling inductance successively; The first low-noise amplifier output is connected with the second low noise amplification unit input; The first low-noise amplifier power end is connected with the second low noise amplification unit input;
The second low noise amplification unit comprises the second capacitance C3, the second coupling inductance L2, the second low-noise amplifier U3 and the 3rd capacitance C4; Second capacitance one end is as the second low noise amplification unit input; Described the first low-noise amplifier output is connected with the second low-noise amplifier input by the second capacitance, the second coupling inductance successively; The second low-noise amplifier output is connected with cavity body filter by the 3rd capacitance.
Described temperature compensation amplifying unit comprises the 3rd low noise amplification unit, temperature compensation attenuator, the 4th low noise amplification unit; Described cavity body filter output, the 3rd low noise amplification unit, temperature compensation attenuator, the 4th low noise amplification unit connect successively; The 4th low noise amplification unit output is as RF output end;
The 3rd low noise amplification unit comprises the 4th capacitance C9, the 3rd coupling inductance L5 and the 3rd low-noise amplifier U4; The 4th capacitance one end is as temperature compensation amplifying unit input; Cavity body filter output is connected with the 4th capacitance one end; The 4th capacitance other end is connected with the 3rd low-noise amplifier input by the 3rd coupling inductance; The 3rd low-noise amplifier output is connected with the 4th low noise amplification unit input by temperature compensation attenuator;
The 4th low noise amplification unit comprises the 5th capacitance C10, the 4th coupling inductance L6 and the 4th low-noise amplifier U6; The 4th coupling inductance one end is as the 4th low noise amplification unit input; The 4th coupling inductance other end is connected with the 4th low-noise amplifier input by the 5th capacitance; The 4th low noise amplifier output connects by the 6th capacitance one end, and the 6th capacitance other end is as RF output end.
DC feedback unit comprises filter and amplification unit power feeding module and temperature compensation amplifying unit power feeding module; Filter and amplification unit power feeding module comprises the first divider resistance R1, the first filter capacitor C5, the second filter capacitor C6, the 3rd filter capacitor C7, the 4th filter capacitor C8, the first feed inductance L 3 and the second feed inductance L 4; First filter capacitor one end is connected with first feed inductance one end, the second low-noise amplifier power end; The first feed inductance other end, second filter capacitor one end, the 3rd filter capacitor one end, first divider resistance one end and temperature compensation amplifying unit power feeding module divide pressure side concurrent to connect; The first divider resistance other end is connected with the first low-noise amplifier power end by the second feed inductance; The first filter capacitor other end, the second filter capacitor other end, the 3rd filter capacitor other end, the 4th filter capacitor other end ground connection.
Temperature compensation amplifying unit power feeding module comprises that dc source, the second divider resistance R2, the 3rd divider resistance R3, the 5th filter capacitor C12, the 6th filtered electrical capacitor C 13, the 7th filtered electrical capacitor C 14, the 3rd feed inductance L 7(effect are that the direct current signal that output enters feeds back in feeding network), the 4th feed inductance L 8 and the 5th feed inductance L 9; Dc source is connected with the 6th capacitance other end, the 3rd feed inductance one end; The 3rd feed inductance other end, the 5th filter capacitor one end, second divider resistance one end, the 3rd divider resistance one end concurrent connect; The second divider resistance other end is connected with the 4th feed inductance one end, the 6th filter capacitor; The 4th feed inductance other end is connected with the 4th low-noise amplifier power end; The 3rd divider resistance other end is connected with the 3rd low-noise amplifier power end, the 7th filter capacitor one end by the 5th feed inductance; The 5th filter capacitor other end, the 6th filter capacitor other end, the 7th filter capacitor other end ground connection; The 3rd divider resistance other end divides pressure side as temperature compensation amplifying unit power feeding module.
Disclosed all features in this description, except mutually exclusive feature, all can combine by any way.
Disclosed arbitrary feature in this description (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object. ,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
Claims (10)
1. an output feed low noise amplifier circuit for attached cavity wave filter, is characterized in that comprising cavity body filter, filter and amplification unit, temperature compensation amplifying unit and DC feedback unit; Cavity body filter passes through the direct milling of mode of machining on cavity; Filter and amplification unit, temperature compensation amplifying unit, DC feedback element solder are in printed board; Printed board is placed in cavity; Filter and amplification unit input is as rf inputs, and filter and amplification unit output is connected with temperature compensation amplifying unit input by cavity body filter; Temperature compensation amplifying unit output is RF output end; DC feedback unit power supply signal is connected with filter and amplification unit, temperature compensation amplifying unit by RF output end.
2. the output feed low noise amplifier circuit of a kind of attached cavity wave filter according to claim 1, it is characterized in that filter and amplification unit comprises prefilter, the first low noise amplification unit and the second low noise amplification unit, described prefilter one end, the first low noise amplification unit, the second low noise amplification unit connect successively, and the second low-noise amplifier output is connected with cavity body filter.
3. the output feed low noise amplifier circuit of a kind of attached cavity wave filter according to claim 2, is characterized in that described prefilter comprises preposition electric capacity and dielectric filter; Preposition electric capacity one end is as RF signal input end, and the preposition electric capacity other end is connected with dielectric filter input, and dielectric filter output is connected with the first low noise amplification unit input;
Described the first low noise amplification unit comprises the first capacitance, the first coupling inductance and the first low-noise amplifier; First capacitance one end is as the first noise amplifying unit input; Described dielectric filter output is connected with the first low-noise amplifier input by the first capacitance, the first coupling inductance successively; The first low-noise amplifier output is connected with the second low noise amplification unit input;
The second low noise amplification unit comprises the second capacitance, the second coupling inductance, the second low-noise amplifier and the 3rd capacitance; Second capacitance one end is as the second low noise amplification unit input; Described the first low-noise amplifier output is connected with the second low-noise amplifier input by the second capacitance, the second coupling inductance successively; The second low-noise amplifier output is connected with cavity body filter by the 3rd capacitance.
4. the output feed low noise amplifier circuit of a kind of attached cavity wave filter according to claim 1, is characterized in that described temperature compensation amplifying unit comprises the 3rd low noise amplification unit, temperature compensation attenuator and the 4th low noise amplification unit; Described cavity body filter output, the 3rd low noise amplification unit, temperature compensation attenuator, the 4th low noise amplification unit connect successively; The 4th low noise amplification unit output is as RF output end.
5. the output feed low noise amplifier circuit of a kind of attached cavity wave filter according to claim 4, is characterized in that described the 3rd low noise amplification unit comprises the 4th capacitance, the 3rd coupling inductance and the 3rd low-noise amplifier; The 4th capacitance one end is as temperature compensation amplifying unit input; Cavity body filter output is connected with the 4th capacitance one end; The 4th capacitance other end is connected with the 3rd low-noise amplifier input by the 3rd coupling inductance; The 3rd low-noise amplifier output is connected with the 4th low noise amplification unit input by temperature compensation attenuator;
The 4th low noise amplification unit comprises the 5th capacitance, the 4th coupling inductance and the 4th low-noise amplifier; The 4th coupling inductance one end is as the 4th low noise amplification unit input; The 4th coupling inductance other end is connected with the 4th low-noise amplifier input by the 5th capacitance; The 4th low noise amplifier output connects by the 6th capacitance one end, and the 6th capacitance other end is as RF output end.
6. the output feed low noise amplifier circuit of a kind of attached cavity wave filter according to claim 5, is characterized in that described DC feedback unit comprises filter and amplification unit power feeding module and temperature compensation amplifying unit power feeding module; Filter and amplification unit power feeding module comprises the first divider resistance, the first filter capacitor, the second filter capacitor, the 3rd filter capacitor, the 4th filter capacitor, the first feed inductance and the second feed inductance; First filter capacitor one end is connected with first feed inductance one end, the second low-noise amplifier power end; The first feed inductance other end, second filter capacitor one end, the 3rd filter capacitor one end, first divider resistance one end and temperature compensation amplifying unit power feeding module divide pressure side concurrent to connect; The first divider resistance other end is connected with the first low-noise amplifier power end by the second feed inductance; The first filter capacitor other end, the second filter capacitor other end, the 3rd filter capacitor other end, the 4th filter capacitor other end ground connection;
Temperature compensation amplifying unit power feeding module comprises dc source, the second divider resistance, the 3rd divider resistance, the 5th filter capacitor, the 6th filter capacitor, the 7th filter capacitor, the 3rd feed inductance, the 4th feed inductance and the 5th feed inductance; Dc source is connected with the 6th capacitance other end, the 3rd feed inductance one end; The 3rd feed inductance other end, the 5th filter capacitor one end, second divider resistance one end, the 3rd divider resistance one end concurrent connect; The second divider resistance other end is connected with the 4th feed inductance one end, the 6th filter capacitor; The 4th feed inductance other end is connected with the 4th low-noise amplifier power end; The 3rd divider resistance other end is connected with the 3rd low-noise amplifier power end, the 7th filter capacitor one end by the 5th feed inductance; The 5th filter capacitor other end, the 6th filter capacitor other end, the 7th filter capacitor other end ground connection; The 3rd divider resistance other end divides pressure side as temperature compensation amplifying unit power feeding module.
7. according to the output feed low noise amplifier circuit of a kind of attached cavity wave filter one of claim 1 to 6 Suo Shu, it is characterized in that described printed board is used 4 laminates, top layer printed board and bottom printed board thickness are 0.3mm, dielectric constant is 3.48, middle two layers of thickness is 0.4mm altogether, and dielectric constant is 4.6.
8. according to the output feed low noise amplifier circuit of a kind of attached cavity wave filter described in claim 3 or 6, it is characterized in that described the first low-noise amplifier and second low-noise amplifier frequency range 2492MHz ± 5MHz, gain reaches 30dB, noise is less than 1.4, and input and output standing-wave ratio is all less than 1.5.
9. according to the output feed low noise amplifier circuit of a kind of attached cavity wave filter described in claim 5 or 6, it is characterized in that described the 3rd low-noise amplifier and the 4th low-noise amplifier frequency range 2492MHz ± 5MHz, gain reaches 30dB, noise is less than 1.4, and input and output standing-wave ratio is all less than 1.5.
10. according to the output feed low noise amplifier circuit of a kind of attached cavity wave filter one of claim 1 to 6 Suo Shu, it is characterized in that described filter and amplification unit, temperature compensation amplifying unit are connected with cavity body filter by silver-coated copper wire respectively; On described silver-coated copper wire, be socketed by the heat-shrink tube that prevents silver-coated copper wire ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108529.1U CN205265632U (en) | 2015-12-29 | 2015-12-29 | Take cavity filter's low noise amplification circuit of output feed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108529.1U CN205265632U (en) | 2015-12-29 | 2015-12-29 | Take cavity filter's low noise amplification circuit of output feed |
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| CN205265632U true CN205265632U (en) | 2016-05-25 |
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| CN201521108529.1U Active CN205265632U (en) | 2015-12-29 | 2015-12-29 | Take cavity filter's low noise amplification circuit of output feed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998193A (en) * | 2017-04-06 | 2017-08-01 | 上海航天测控通信研究所 | S frequency ranges relay power amplifier wave filter integrated morphology |
| CN109245786A (en) * | 2018-11-13 | 2019-01-18 | 上海艾为电子技术股份有限公司 | A kind of modular circuit applied in radio front end receiver |
-
2015
- 2015-12-29 CN CN201521108529.1U patent/CN205265632U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998193A (en) * | 2017-04-06 | 2017-08-01 | 上海航天测控通信研究所 | S frequency ranges relay power amplifier wave filter integrated morphology |
| CN106998193B (en) * | 2017-04-06 | 2020-12-22 | 上海航天测控通信研究所 | S-band relay power amplifier filter integrated structure |
| CN109245786A (en) * | 2018-11-13 | 2019-01-18 | 上海艾为电子技术股份有限公司 | A kind of modular circuit applied in radio front end receiver |
| CN109245786B (en) * | 2018-11-13 | 2023-12-01 | 上海艾为电子技术股份有限公司 | Module circuit applied to radio frequency front-end receiver |
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