CN203135854U - Microwave reception front end assembly - Google Patents
Microwave reception front end assembly Download PDFInfo
- Publication number
- CN203135854U CN203135854U CN 201320019882 CN201320019882U CN203135854U CN 203135854 U CN203135854 U CN 203135854U CN 201320019882 CN201320019882 CN 201320019882 CN 201320019882 U CN201320019882 U CN 201320019882U CN 203135854 U CN203135854 U CN 203135854U
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- CN
- China
- Prior art keywords
- filter
- amplitude limiter
- end assembly
- low noise
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a microwave reception front end assembly comprising an amplitude limiter, a filter, an image rejection mixer, a local oscillator and a filter amplifier; the microwave reception front end assembly is characterized in that the amplitude limiter is externally connected with signal input source, and an output terminal of the amplitude limiter is connected in series in sequence with a low noise amplifier1, a low noise amplifier2, the filter, the image rejection mixer and the filter amplifier; and the local oscillator is connected with the image rejection mixer. The microwave reception front end assembly has ultralow noises, is safe, reliable, and simple, and is easy to use.
Description
Technical field
The utility model relates to electronic technology field, particularly a kind of microwave front end receiving unit that is applied to satellite communication, radar communication etc.
Background technology
Microwave front end receiving unit is the critical component of field high sensitive receivers such as satellite communication, radar communication, is responsible for processes such as radio reception, amplification, but owing to constructing reason at present, existing microwave front end receiving unit has higher this shortcoming of noise.
The utility model content
Order of the present utility model is to solve high this problem of traditional microwave front end receiving unit noise, and is little, safe and reliable and be simple and easy to the microwave front end receiving unit of usefulness so that noise factor to be provided.
The microwave receiving front end assemblies comprises amplitude limiter, filter, image-reject mixer, local oscillator and filter amplifier; It is characterized in that amplitude limiter outer signal input source, its output connect successively low noise amplifier one, low noise amplifier two, filter, image-reject mixer and filter amplifier; Local oscillator links to each other with image-reject mixer in addition.
In sum, microwave receiving front end assemblies provided by the utility model has following advantage:
1, filter passes through useful signal is zero-decrement as much as possible, and allows unwanted signal reflect as much as possible, effectively lessen any interference; Two low noise amplifiers are connected, and have further strengthened the reduction ability of noise in the signal, make noise littler;
2, adopt image frequency rejection mixer, when local frequency changes, because the inner phase place matching relationship of mixer, repressed image frequency scope also will change thereupon, make it still can play the effect that image frequency suppresses, and suppress for harmonic wave.
Description of drawings
Fig. 1 is the structure principle chart of microwave front end receiving unit.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
-as shown in Figure 1, the utility model microwave receiving front end assemblies comprises amplitude limiter, filter, image-reject mixer, local oscillator and filter amplifier; It is characterized in that amplitude limiter outer signal input source, its output connect successively low noise amplifier one, low noise amplifier two, filter, image-reject mixer and filter amplifier; Local oscillator links to each other with image-reject mixer in addition.
Amplitude limiter has the function of input signal being carried out shaping, waveform transformation and overvoltage protection.
Low noise amplifier one plays the effect that reduces noise in the signal.
Low noise amplifier two further reduces the noise in the signal.
Filter passes through useful signal is zero-decrement as much as possible, and allows unwanted signal reflect as much as possible.
Adopt image frequency rejection mixer, when local frequency changes, because the inner phase place matching relationship of mixer, repressed image frequency scope also will change thereupon, make it still can play the effect that image frequency suppresses.
Though by reference to the accompanying drawings embodiment of the present utility model is described in detail, should not be construed as the restriction to the protection range of this patent.In the described scope of claims, the various modifications that those skilled in the art can make without creative work and distortion still belong to the protection range of this patent.
Claims (1)
1. a microwave receiving front end assemblies comprises amplitude limiter, filter, image-reject mixer, local oscillator and filter amplifier; It is characterized in that amplitude limiter outer signal input source, its output connect successively low noise amplifier one, low noise amplifier two, filter, image-reject mixer and filter amplifier; Local oscillator links to each other with image-reject mixer in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320019882 CN203135854U (en) | 2013-01-15 | 2013-01-15 | Microwave reception front end assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320019882 CN203135854U (en) | 2013-01-15 | 2013-01-15 | Microwave reception front end assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203135854U true CN203135854U (en) | 2013-08-14 |
Family
ID=48943790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320019882 Expired - Lifetime CN203135854U (en) | 2013-01-15 | 2013-01-15 | Microwave reception front end assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203135854U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107493108A (en) * | 2017-08-15 | 2017-12-19 | 东南大学 | The cantilever beam microwave receiver front end that a kind of internet of things oriented excess energy is collected |
| CN107565996A (en) * | 2017-08-15 | 2018-01-09 | 东南大学 | The cantilever beam receiver front end that internet of things oriented standing wave energy and release model are collected |
| CN107659320A (en) * | 2017-08-15 | 2018-02-02 | 东南大学 | The cantilever beam receiver front end that internet of things oriented excess energy and release model are collected |
-
2013
- 2013-01-15 CN CN 201320019882 patent/CN203135854U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107493108A (en) * | 2017-08-15 | 2017-12-19 | 东南大学 | The cantilever beam microwave receiver front end that a kind of internet of things oriented excess energy is collected |
| CN107565996A (en) * | 2017-08-15 | 2018-01-09 | 东南大学 | The cantilever beam receiver front end that internet of things oriented standing wave energy and release model are collected |
| CN107659320A (en) * | 2017-08-15 | 2018-02-02 | 东南大学 | The cantilever beam receiver front end that internet of things oriented excess energy and release model are collected |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |
|
| CX01 | Expiry of patent term |