CN202085135U - High-intermodulation V/UHF (very/ultra high frequency) receiving multiple-path coupler - Google Patents
High-intermodulation V/UHF (very/ultra high frequency) receiving multiple-path coupler Download PDFInfo
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- CN202085135U CN202085135U CN2010201707820U CN201020170782U CN202085135U CN 202085135 U CN202085135 U CN 202085135U CN 2010201707820 U CN2010201707820 U CN 2010201707820U CN 201020170782 U CN201020170782 U CN 201020170782U CN 202085135 U CN202085135 U CN 202085135U
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- path coupler
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Abstract
The utility model relates to a high-intermodulation V/UHF (very/ultra high frequency) receiving multiple-path coupler, which comprises a filtering module, a radio frequency module and a display control panel in sequential connection. The radio frequency module comprises an input protecting circuit, a primary amplifier, a two-path power divider, a primary resistance attenuation network, a four-way power divider, a secondary amplifier, a secondary resistance attenuation network and a failure detecting circuit in sequential connection. The failure detecting circuit is used for judging whether a closed circuit is in failure or not by detecting output power of each path of the radio frequency module and connected with the display control panel, and the input protecting circuit is connected with the filtering module. The high-intermodulation V/UHF receiving multiple-path coupler realizes the function that a plurality of receiving devices share a pair of antennae, has the performance advantages of high intermodulation and isolation and low noise coefficient, and has the structural advantages of small size and light weight. Compared with a traditional receiving multiple-path coupler, the high-intermodulation V/UHF (very/ultra high frequency) receiving multiple-path coupler is wider in dynamic range and higher in isolation degree.
Description
Technical field
The utility model relates to the antenna sharing apparatus of radio receiving apparatus, particularly the collection of letters multiple-path coupler of 30MHz-1000MHz wireless device.
Background technology
Continuous development along with modern communication technology, often equipped a lot of Wireless Telecom Equipments on same naval vessel or the same vehicle, tend to the phase mutual interference between them, particularly transmitter is to the interference of receiver: can cause the saturated of receiver on the one hand, on the other hand, the transmit intermodulation product that forms at receiver end also may influence the reception of receiver.The intermodulation index of traditional collection of letters multiple-path coupler is general, and therefore above-mentioned two kinds of influences are comparatively obvious.
Secondly, the output port isolation of traditional collection of letters multiple-path coupler and reverse isolation degree index are all general, can occur like this that each receiving equipment influences each other or the interference signal of receiving equipment by coupler and antenna to extraradial consequence.
Once more, traditional collection of letters multiple-path coupler does not possess self-checking function, in case certain path breaks down, can't in time find.
The utility model content
For the shortcoming that overcomes existing collection of letters multiple-path coupler with not enough, the purpose of this utility model is to provide a kind of V/UHF collection of letters multiple-path coupler of high intermodulation, the intermodulation index is higher and possess self-checking function.
The purpose of this utility model is achieved through the following technical solutions: a kind of V/UHF collection of letters multiple-path coupler of high intermodulation comprises filtration module, the radio-frequency module that connects successively and shows the control plate; Described radio-frequency module comprises successively input protection circuit, first order amplifier, two road power splitters, first order resistance decrement network, four road power splitters, second level amplifier, the second level resistance decrement network that connects, and is used to detect each road power output of radio-frequency module and judges whether out of order failure detector circuit of place path; Input protection circuit is connected with filtration module, and failure detector circuit is connected with apparent control plate.
Described filtration module is a band pass filter.
Compared with prior art, the utlity model has following advantage and beneficial effect:
1, has higher intermodulation index.For the collection of letters multiple-path coupler that is similarly 8 tunnel outputs, the third order intermodulation index OIP of prior art
3Be 20dBm, and third order intermodulation index OIP of the present utility model
3Be 35dBm.Therefore it can bear bigger radiofrequency signal and unlikely saturated, and the influence of the intermodulation product that produces at the coupler place is also littler.
2, adopt the two-stage amplifying circuit, have higher output port isolation and reverse isolation degree.The output port isolation of prior art is 35dB, and the reverse isolation degree is 30dB, and output isolation of the present utility model and reverse isolation degree are all greater than 50dB; Like this, the influence between the receiving equipment, or receiving equipment has just weakened to extraradial interference signal greatly by coupler and antenna.
3, have self-checking function, make things convenient for the user in time to find fault, on-call maintenance equipment.
4, realized the function of the shared common antenna of a plurality of receiving equipments, frequency range is 30MHz-1000MHz, have the performance characteristics and little, the lightweight design feature of volume of high intermodulation, high isolation and low-noise factor, be mainly used in the narrow and small occasions in space such as naval vessel and vehicle; Compare with tradition collection of letters multiple-path coupler, this equipment has bigger dynamic range and the isolation of Geng Gao.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is a radio-frequency module signal flow graph of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is further described, but execution mode of the present utility model is not limited thereto.
The utility model is a kind of V/UHF collection of letters multiple-path coupler of high intermodulation, as shown in Figure 1, comprises filtration module, radio-frequency module, power module, shows control plate and alternating current-direct current filter, wherein:
(1) filtration module.Filtration module receives the radiofrequency signal from antenna, and this radiofrequency signal is carried out giving radio-frequency module after the filtering.This module comprises a band pass filter, and this band pass filter is made of 7 rank chebyshev low-pass filters and 7 rank Chebyshev's high pass filters, and the passband of filter is 30MHz-1000MHz, has realized the frequency-selecting to input signal, filtering out of band signal.
(2) radio-frequency module.Radio-frequency module receives the radiofrequency signal from filtration module, and this signal is coupled into the output of 8 road signals.Radio-frequency module comprises input protection circuit, first order amplifier, two road power splitters, first order resistance decrement network, four road power splitters, second level amplifier, second level resistance decrement network and failure detector circuit.As shown in Figure 2, input protection circuit with large-signal particularly the thunder and lightning signal switch to ground, the protection back circuit; The major function of first order amplifier is to improve gain, noise-reduction coefficient; Two road power splitters are No. two power dividers, and four road power splitters are No. four power dividers, and this two stage power distributor is divided into 8 tunnel radiofrequency signals with 1 tunnel radiofrequency signal; First order resistance decrement network (π shape) between two road power splitters and four road power splitters carries out impedance conversion, makes two stage power distributor matched well; The major function of second level amplifier is to improve isolation, comprises output isolation and reverse isolation degree; Second level resistance decrement network (π shape) is decayed signal, to satisfy the requirement of system gain; Failure detector circuit detects each road power output of radio-frequency module and judges whether the place path has fault, in case power less than setting thresholding, failure detector circuit just can be exported to low level and show the control plate.
(3) power module.Power module provides radio-frequency module and shows control plate required voltage.Adopt the AC and DC supply power mode, be input as alternating current 220V or direct current 24V, be output as+12V ,+5V or+3.3V.Power module adopt to exchange preferential supply power mode, and when alternating current and direct current were imported simultaneously, direct current is controlled can not be imported.
(4) show the control plate.Show the fault alarm signal of control plate reception, this signal and malfunction indicator lamp are mapped from radio-frequency module.If the low level of receiving, faulty indication etc. light, otherwise malfunction indicator lamp does not work.
(5) alternating current-direct current filter.The alternating current-direct current filter comprises alternating current supply filter and DC wave filter, mainly is the interference signal on the filter out power, thereby the equipment that makes has better Electro Magnetic Compatibility.
Need to prove:
1, according to upper type, the utility model can be installed on 19 cun standard cabinets, highly is 44mm (1U), and weight can be controlled in the 5kg.
2, the utility model is higher than traditional collection of letters multiple-path coupler except that intermodulation and two indexs of isolation, and other indexs are all suitable with traditional collection of letters multiple-path coupler, and other indexs comprise frequency range, gain, gain flatness, noise factor etc.
3, the frequency range of utility model described above can be changed according to the actual requirements, and with interior any frequency range, the passband that only needs to change filtration module can realize for 30MHz-1000MHz.
The foregoing description is the utility model preferred implementation; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.
Claims (4)
1. the V/UHF collection of letters multiple-path coupler of a high intermodulation is characterized in that: comprise filtration module, the radio-frequency module that connects successively and show the control plate; Described radio-frequency module comprises successively input protection circuit, first order amplifier, two road power splitters, first order resistance decrement network, four road power splitters, second level amplifier, the second level resistance decrement network that connects, and is used to detect each road power output of radio-frequency module and judges whether out of order failure detector circuit of place path; Input protection circuit is connected with filtration module, and failure detector circuit is connected with apparent control plate.
2. the V/UHF collection of letters multiple-path coupler of high intermodulation according to claim 1, it is characterized in that: described filtration module is a band pass filter.
3. the V/UHF collection of letters multiple-path coupler of high intermodulation according to claim 1 is characterized in that: also comprise power module, and the filter that is connected with power module, be used for the interference signal on the filter out power.
4. the V/UHF collection of letters multiple-path coupler of high intermodulation according to claim 3, it is characterized in that: described filter is the alternating current-direct current filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201707820U CN202085135U (en) | 2010-04-19 | 2010-04-19 | High-intermodulation V/UHF (very/ultra high frequency) receiving multiple-path coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201707820U CN202085135U (en) | 2010-04-19 | 2010-04-19 | High-intermodulation V/UHF (very/ultra high frequency) receiving multiple-path coupler |
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| Publication Number | Publication Date |
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| CN202085135U true CN202085135U (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201707820U Expired - Lifetime CN202085135U (en) | 2010-04-19 | 2010-04-19 | High-intermodulation V/UHF (very/ultra high frequency) receiving multiple-path coupler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162818A (en) * | 2019-12-31 | 2020-05-15 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Antenna sharing device suitable for ultrashort wave radio station under TDMA network |
-
2010
- 2010-04-19 CN CN2010201707820U patent/CN202085135U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162818A (en) * | 2019-12-31 | 2020-05-15 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Antenna sharing device suitable for ultrashort wave radio station under TDMA network |
| CN111162818B (en) * | 2019-12-31 | 2021-11-23 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Antenna sharing device suitable for ultrashort wave radio station under TDMA network |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111221 |
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| CX01 | Expiry of patent term |