CN201725865U - High-gain broadband antenna based on impedance matching principle - Google Patents
High-gain broadband antenna based on impedance matching principle Download PDFInfo
- Publication number
- CN201725865U CN201725865U CN 200920319249 CN200920319249U CN201725865U CN 201725865 U CN201725865 U CN 201725865U CN 200920319249 CN200920319249 CN 200920319249 CN 200920319249 U CN200920319249 U CN 200920319249U CN 201725865 U CN201725865 U CN 201725865U
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- gain broadband
- impedance matching
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Abstract
The utility model belongs to the technical field of electronic test and measurement, and relates to a high-gain broadband antenna based on an impedance matching principle. The high-gain broadband antenna is characterized by comprising conical antenna vibrators, an impedance changer, an antenna feed loop, an antenna strut, an N-type radiofrequency connector and threaded inner conductors, the two conical antenna vibrators are connected with threaded holes of the impedance changers through the threaded inner conductors at the ends and are symmetrically distributed on two sides of the impedance changer, the integral impedance changer is connected with the antenna strut, the antenna feed loop is disposed in the antenna strut, and the N-type radiofrequency connector is externally embedded at the bottom end of the antenna strut. The high-gain broadband antenna is applicable to measurement of electromagnetic field radiation emission, and can also be used for measurement of radiosensitivity or noise immunity, shielding efficacy of shielding chambers, shielding shelters and equipment cabinets and radiated interference leakage detection of large-sized electronic equipment and systems.
Description
Technical field
The utility model belongs to Electronic Testing and field of measuring technique, relates to a kind of high-gain broadband antenna based on impedance matching principle.
Background technology
In the electromagnetic compatibility field, the electric field and the ambient electromagnetic field that leak when being used to receive equipment under test work are especially measured in the frequency range at 30MHz～200MHz, often use biconical antenna.And himself impedance of present employed antenna and test macro can not finely mate, thereby have strengthened self reflection, make its standing-wave ratio very big.This just can't improve the sensitivity that signal receives, and needs a kind of high-gain broadband antenna based on impedance matching principle on the engineering for this reason, the antenna of promptly low standing-wave ratio, high radiated emission efficient.
Summary of the invention
The purpose of this utility model is to provide a kind of high-gain broadband antenna based on impedance matching principle, to be applicable to the measurement of electromagnetic field radiation emission, and be used for the measurement of radiated susceptibility or immunity to interference, and shielded enclosure, shielding shelter, the screening effectiveness of rack and the radiated interference leak detection test of large scale electronic equipment and system.
To achieve these goals, the technical solution of the utility model is: the high-gain broadband antenna based on impedance matching principle is characterized in that: it comprises conical antenna oscillator, impedance conversion device, antenna feed loop, antenna pole, N type radio frequency connector and screw thread inner wire; Two conical antenna oscillators link to each other with the screwed hole of impedance conversion device by the screw thread inner wire of end, and two conical antenna oscillators are symmetrically distributed in the impedance conversion device both sides, and impedance conversion device integral body is connected with antenna pole; The antenna feed loop is built in the antenna pole, and N type radio frequency connector is embedded in antenna pole bottom outward.
Described antenna feed loop is to be made of N type radio frequency connector and radio frequency coaxial-cable and one group of ferrite bead.
Described conical antenna oscillator is made up of six roots of sensation metal cylinder, and is 60 ° of angles mutually and evenly distributes, with strengthen antenna with regard to receptivity.
Described impedance conversion device is to constitute the balance/imbalance converting means by the form concentric spirals inductance, and its effect is that the impedance transition with 120 Ω is 50 Ω, so that antenna impedance and feeder line coupling.
Described antenna feed loop is formed by one 50 Ω coaxial radio frequency cable, and it links to each other with N type radio frequency connector.
The utility model advantage: the utility model relates to a kind of test antenna of calibration test and electromagnetic compatibility radiated interference test macro, and it not only can be used for the measurement of electromagnetic field radiation emission, and can be used for the measurement of radiated susceptibility or immunity to interference.It need not be tuning, for convenience detach, have characteristics such as high-gain, broadband, be fit to cooperate with receiver, thereby the composition Auto-Test System carried out sweep check to system.
Description of drawings
Below in conjunction with the specific embodiment accompanying drawing the utility model is described in detail.
Fig. 1 is based on the high-gain broadband antenna structural representation of impedance matching principle;
Among the figure: 1, conical antenna oscillator; 2, impedance conversion device; 3, antenna feed loop; 4, antenna pole; 5, N type radio frequency connector; 6, screw thread inner wire.
Embodiment
Shown in the structural representation of the high-gain wide frequency antenna of Fig. 1 impedance matching principle, based on the high-gain broadband antenna of impedance matching principle, comprise conical antenna oscillator 1, impedance conversion device 2, antenna feed loop 3, antenna pole 4, N type radio frequency connector 5 and screw thread inner wire 6; Two conical antenna oscillators 1 link to each other with the screwed hole of impedance conversion device 2 by the screw thread inner wire 6 of end, and two conical antenna oscillators 1 are symmetrically distributed in impedance conversion device 2 both sides, and impedance conversion device 2 integral body are connected (welding) with antenna pole 4; Antenna feed loop 3 is built in the antenna pole 4, N type radio frequency connector 5 outer antenna pole 4 bottoms that are embedded in.Antenna feed loop 3 is to be made of N type radio frequency connector 5 and radio frequency coaxial-cable and one group of ferrite bead.Conical antenna oscillator 1 is made up of six roots of sensation metal cylinder, and is 60 ° of angles mutually and evenly distributes, with strengthen antenna with regard to receptivity.Impedance conversion device 2 is to constitute the balance/imbalance converting means by the form concentric spirals inductance, and its effect is that the impedance transition with 120 Ω is 50 Ω, so that antenna impedance and feeder line coupling.Antenna feed loop 3 is formed by one 50 Ω coaxial radio frequency cable, and it links to each other with N type radio frequency connector 5.In the antenna feed loop 3, one group of ferrite bead is fixed on the 50 Ω coaxial radio frequency cables, to eliminate the high-frequency coupling of cable and antenna body, the input impedance that can regulate simultaneously feeding circuit reaches 50 Ω, make the antenna overall impedance reach 50 Ω, with the fine coupling of test macro, reach very little antenna standing wave ratio.
Claims (5)
1. based on the high-gain broadband antenna of impedance matching principle, it is characterized in that: it comprises conical antenna oscillator (1), impedance conversion device (2), antenna feed loop (3), antenna pole (4), N type radio frequency connector (5) and screw thread inner wire (6); Two conical antenna oscillators (1) link to each other with the screwed hole of impedance conversion device (2) by the screw thread inner wire (6) of end, two conical antenna oscillators (1) are symmetrically distributed in impedance conversion device (2) both sides, and impedance conversion device (2) is whole to be connected with antenna pole (4); Antenna feed loop (3) is built in the antenna pole (4), outer antenna pole (4) bottom that is embedded in of N type radio frequency connector (5).
2. the high-gain broadband antenna based on impedance matching principle according to claim 1 is characterized in that: described antenna feed loop (3) is by N type radio frequency connector (5) and radio frequency coaxial-cable and one group of ferrite bead formation.
3. the high-gain broadband antenna based on impedance matching principle according to claim 1 is characterized in that: described conical antenna oscillator (1) is made up of six roots of sensation metal cylinder, and is 60 ° of angles mutually and evenly distributes.
4. the high-gain broadband antenna based on impedance matching principle according to claim 1 is characterized in that: described impedance conversion device (2) is to constitute the balance/imbalance converting means by the form concentric spirals inductance.
5. the high-gain broadband antenna based on impedance matching principle according to claim 1 is characterized in that: described antenna feed loop (3) is formed by one 50 Ω coaxial radio frequency cable, and it links to each other with N type radio frequency connector (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920319249 CN201725865U (en) | 2009-12-31 | 2009-12-31 | High-gain broadband antenna based on impedance matching principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920319249 CN201725865U (en) | 2009-12-31 | 2009-12-31 | High-gain broadband antenna based on impedance matching principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201725865U true CN201725865U (en) | 2011-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920319249 Expired - Lifetime CN201725865U (en) | 2009-12-31 | 2009-12-31 | High-gain broadband antenna based on impedance matching principle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201725865U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955091A (en) * | 2012-11-29 | 2013-03-06 | 西安开容电子技术有限责任公司 | Method for testing and evaluating low frequency shielding efficiency of shielding square cabin under condition of complete cabin |
-
2009
- 2009-12-31 CN CN 200920319249 patent/CN201725865U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955091A (en) * | 2012-11-29 | 2013-03-06 | 西安开容电子技术有限责任公司 | Method for testing and evaluating low frequency shielding efficiency of shielding square cabin under condition of complete cabin |
| CN102955091B (en) * | 2012-11-29 | 2015-10-21 | 西安开容电子技术有限责任公司 | Shielding shelter low frequency shield effectiveness test and evaluation method under the condition of whole cabin |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110126 |