CN201230312Y - Antenna sharing apparatus for short wave, ultra-short wave equipment - Google Patents
Antenna sharing apparatus for short wave, ultra-short wave equipment Download PDFInfo
- Publication number
- CN201230312Y CN201230312Y CNU2008201503008U CN200820150300U CN201230312Y CN 201230312 Y CN201230312 Y CN 201230312Y CN U2008201503008 U CNU2008201503008 U CN U2008201503008U CN 200820150300 U CN200820150300 U CN 200820150300U CN 201230312 Y CN201230312 Y CN 201230312Y
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- pass filter
- antenna
- low
- parallel
- filter unit
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Abstract
The utility model relates to an antenna-sharing device by which a shortwave device and an ultrashort wave device can share the antenna, including a coupled circuit used for switching in the antenna. The coupled circuit comprises a low-frequency filtering unit, a high-frequency filtering unit and a susceptance compensating network. The low-frequency filtering unit and the high-frequency filtering unit are in parallel connection, and are then connected between the susceptance compensating networks; the low-frequency filtering unit comprises a low-frequency filter which is connected with a capacitance in parallel and is then connected with a plurality of inductance in series; the high-frequency unit comprises a high-filter which is connected with an inductance in parallel and is then connected with a plurality of capacitances. Compared with the prior art, the antenna-sharing device can lead the shortwave and the ultrashort wave radio devices to share the same antenna simultaneously.
Description
Technical field
The utility model relates to the shared of shortwave, UHF radio set, particularly relates to a kind of antenna sharing apparatus that is used for shortwave, ultrashort wave equipment.
Background technology
As shown in Figure 1, shortwave, UHF radio set use an antenna, carry out the usufructuary switching of antenna by manual or motor-driven switch, have only an equipment can use antenna obviously simultaneously, and promptly antenna is public but not shared.
Summary of the invention
Technical problem to be solved in the utility model is exactly to provide a kind of antenna sharing apparatus that is used for shortwave, ultrashort wave equipment for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions: a kind of shortwave that is used for, the antenna sharing apparatus of ultrashort wave equipment, it is characterized in that, comprise the coupling circuit that is used to insert antenna, described coupling circuit comprises low-pass filter unit, high pass filter unit, the susceptance compensating network, described low-pass filter unit, be connected in after the high pass filter unit parallel connection between the susceptance compensating network, described low-pass filter unit comprises low pass filter, the a plurality of inductance of series connection behind this low pass filter electric capacity in parallel, described high pass filter unit comprises high pass filter, a plurality of electric capacity of series connection behind this high pass filter inductance in parallel.
Described susceptance compensating network is the resonant circuit that an inductance and a capacitances in series constitute.
Compared with prior art, the utility model is simple in structure, easy to use, can make shortwave, UHF radio set use same antenna simultaneously.
Description of drawings
Fig. 1 is the public schematic diagram of the antenna of existing shortwave, UHF radio set;
Fig. 2 is a schematic diagram of the present utility model;
Fig. 3 is the schematic diagram of coupling circuit of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Shown in Fig. 2,3, a kind of antenna sharing apparatus that is used for shortwave, ultrashort wave equipment, this composite device 1 comprises the coupling circuit 3 that is used to insert antenna 2, described coupling circuit 3 comprises low-pass filter unit 4, high pass filter unit 5, susceptance compensating network 6, be connected between the susceptance compensating network 6 after described low-pass filter unit 4, high pass filter unit 5 parallel connections, described low-pass filter unit 4 comprises low pass filter 7, the a plurality of inductance of series connection behind these low pass filter 7 electric capacity in parallel, present embodiment has adopted inductance L
OL1, inductance L
OL2, described high pass filter unit 5 comprises high pass filter 8, a plurality of electric capacity of series connection behind these high pass filter 8 inductance in parallel, and present embodiment has adopted capacitor C
OH1, capacitor C
OH2
Described susceptance compensating network is an inductance L
KAnd capacitor C
KThe resonant circuit that series connection constitutes.
The utility model principle: antenna is linked into the coupling circuit input, and short-wave receiver equipment and ultrashort wave radio set are shared, and combined antenna carries out transceiver.Coupler common antenna function is realized by high-pass and low-pass filter parallel with one another.Can not allow the higher ultrashort wave of frequency pass through in the low pass filter band by short-wave signal, and only allow the ultrashort wave signal pass through in the frequency band of high pass filter, and do not allow the lower short-wave signal of frequency pass through.High-pass and low-pass filter attenuation outside a channel value has determined the isolation of two passages, and attenuation outside a channel is big more, and the influence of two passages is just more little.But because filter square wave system number can not be 1, the attenuation outside a channel that reach certain value must have the transition band of certain width, and transition band width is mainly by to insulated degree requirement and selected form of filter and joint number decision.It is excessive frequency band that the utility model is selected 24-30MHz, perhaps cries the isolation strip.
Coupler is made up of the filter of high low pass combination.The Coupling Design key is the bank of filters design, and the key of bank of filters design is the compensating network of parallel filter, because only design compensating network, just can reduce the filtering influence that the filter parallel connection is brought, thereby improve filtering matching performance and operating characteristic.
In multichannel carrier communication with frequency partition, often need the use in parallel of several filters, coupler closes the road and just needs the filter parallel connection along separate routes.After the filter parallel connection, filter passband is another filter stop bend often, and when a filtering characteristic impedance was resistive, another filter characteristic impedance was a reactive, produces some harmful effects after the filter parallel connection:
A) shunting each other increases the filter passband attenuation;
B) the filter parallel connected end is a complex impedance, can not with the fine coupling of load, thereby operating characteristic is degenerated.
Relative less for effective attenuation after making the filter parallel connection with the operating characteristic influence, must adopt various distinct methods to compensate.
Solve the filter impedance matching problem X hold-carrying and compensating network method are arranged.The high-pass and low-pass filter group that the most suitable cut-off frequency of X hold-carrying is identical.
X hold-carrying of the present utility model: low pass filter crosstalk sense cancellation high pass capacitive component influences in lower passband.Similarly, counteracting low pass inductive component is held in the high pass crosstalk influences in the high pass passband.Thereby making separately, the passband internal characteristic helps mating between filter and the load near a pure resistance.Yet the high-pass and low-pass filter cut-off frequency is different when practice.
Therefore, two filters of parallel operation are depended merely between the x terminal method neutralizing filter mutually, and reactance influence exists certain difficulty, therefore residual electricity is received still greatlyyer near cut-off frequency, removes and adopts the x terminal method also to need a compensating network to come further neutralizing filter group residue susceptance.Compensating network is by L
KAnd C
KThe series resonant circuit of being formed.
Claims (2)
1. antenna sharing apparatus that is used for shortwave, ultrashort wave equipment, it is characterized in that, comprise the coupling circuit that is used to insert antenna, described coupling circuit comprises low-pass filter unit, high pass filter unit, susceptance compensating network, be connected between the susceptance compensating network after described low-pass filter unit, the high pass filter unit parallel connection, described low-pass filter unit comprises low pass filter, the a plurality of inductance of series connection behind this low pass filter electric capacity in parallel, described high pass filter unit comprises high pass filter, a plurality of electric capacity of series connection behind this high pass filter inductance in parallel.
2. a kind of antenna sharing apparatus that is used for shortwave, ultrashort wave equipment according to claim 1 is characterized in that, described susceptance compensating network is the resonant circuit that an inductance and a capacitances in series constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201503008U CN201230312Y (en) | 2008-06-30 | 2008-06-30 | Antenna sharing apparatus for short wave, ultra-short wave equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201503008U CN201230312Y (en) | 2008-06-30 | 2008-06-30 | Antenna sharing apparatus for short wave, ultra-short wave equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201230312Y true CN201230312Y (en) | 2009-04-29 |
Family
ID=40635254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201503008U Expired - Lifetime CN201230312Y (en) | 2008-06-30 | 2008-06-30 | Antenna sharing apparatus for short wave, ultra-short wave equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201230312Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346404A (en) * | 2013-06-28 | 2013-10-09 | 无锡创元电子科技有限公司 | Resonant type broadband short-wave antenna |
-
2008
- 2008-06-30 CN CNU2008201503008U patent/CN201230312Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346404A (en) * | 2013-06-28 | 2013-10-09 | 无锡创元电子科技有限公司 | Resonant type broadband short-wave antenna |
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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: 20090429 |
|
| CX01 | Expiry of patent term |