CN204885424U - A antenna signal transceiver for car navigation - Google Patents
A antenna signal transceiver for car navigation Download PDFInfo
- Publication number
- CN204885424U CN204885424U CN201520459219.8U CN201520459219U CN204885424U CN 204885424 U CN204885424 U CN 204885424U CN 201520459219 U CN201520459219 U CN 201520459219U CN 204885424 U CN204885424 U CN 204885424U
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- medium substrate
- antenna
- base plate
- round platform
- radiant body
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Abstract
The utility model discloses an antenna signal transceiver for car navigation, including the medium base plate, the medium base plate is fan -shaped shape at zhan pinghou, the medium base plate is the round platform shape at the during operation, the medium base plate be the round platform shape the time, the girth of the round platform small end face of the medium base plate of its round platform shape is 0.26 lambda, the girth of the big terminal surface of round platform of the medium base plate of its round platform shape is 0.67 lambda 0, lambda is antenna central frequency's wavelength, the medium base plate is when being fan -shaped shape, the upper surface of medium base plate is provided with left irradiator and right irradiator, left side irradiator and right irradiator all are connected to the feed -in utmost point through the microstrip wire.
Description
Technical field
The utility model relates to car antenna technology, specifically for the aerial signal transceiver of auto navigation.
Background technology
It is indispensable assembly that aerial signal transceiver for auto navigation is put at global position system GPS, and it is widely used in the multiple fields such as navigation, time service, communication.And in the research and development process of gps system, antenna becomes one of key issue that must solve.Require that antenna neither affects its aerodynamic quality, do not destroy its mechanical structure and intensity again.So, there is low section, the antenna array of the outstanding properties advantage such as easy of integration is used widely on automobile.Aerial signal transceiver for auto navigation is put, and operating frequency is higher, substantially unrestricted in size, and the cambered surface spacing of adjacent cells is greater than or close to the half-wavelength of operating frequency of antenna.But when antenna size is limited, if the cambered surface spacing of adjacent cells is less than half-wavelength, the coupling aggravation between unit, the voltage standing wave ratio of antenna array will sharply worsen, and radiation characteristic also has violent fluctuating, extremely unstable.So in GPS frequency range, antenna size is subject to the restriction of conformal body cone surface area, and the miniaturization of antenna becomes the key problem in design.Many weeks, gps antenna is right-handed circular polarization antenna, but considers miniaturized requirement, in order to meet radiation characteristic, adopts linear polarized antenna can reduce the loss of 3dB.
Utility model content
The purpose of this utility model is to provide a kind of aerial signal transceiver for auto navigation, have devised a kind of miniaturized GPS conical surface conformal array antenna adopting linear polarization mode, improves the performance of antenna while reducing antenna size.
The purpose of this utility model is achieved through the following technical solutions: for the aerial signal transceiver of auto navigation, comprise medium substrate, medium substrate is fan shape in flattening afterwards, medium substrate is operationally in truncated conical shape, medium substrate is when in truncated conical shape, the girth of the round platform small end face of the medium substrate of its truncated conical shape is 0.26 λ, the girth of the round platform large end face of the medium substrate of its truncated conical shape is 0.67 λ, λ is the wavelength of center of antenna frequency, medium substrate is when in fan shape, the upper surface of medium substrate is provided with left radiant body and right radiant body, left radiant body and right radiant body are all connected to feed-in pole by microstrip conductor.
Medium substrate is when in truncated conical shape, and the bus length of the medium substrate of its truncated conical shape is 0.24 λ.
Medium substrate adopts the high-k flexible media substrate of er=10.2.
The thickness of medium substrate is h=0.6mm.
Left radiant body and right radiant body all have that well width is Ws, groove depth is the groove of Ls, described microstrip conductor comprises the left feed-in minor matters inserted in left radiant body groove and the right feed-in minor matters inserted in left radiant body groove, also comprise micro-band and divide distribution, micro-band divides the two ends of distribution to be connected with left radiant body and right feed-in minor matters respectively, and feed-in pole and micro-band divide the mid point of distribution to be connected.
The width of described left feed-in minor matters and right feed-in minor matters is all less than Ws.
Because astronomical cycle face area is minimum, antenna array can only adopt the micro-band conformal structure of Unit 2, array element cambered surface spacing is only 0.25 λ, much smaller than the half-wavelength of operating frequency of antenna, between array element, coupling is strong, and the radiation of antenna requirement horizontal omnidirectional, it is miniaturized that this makes Antenna Design realize, and ensures centre frequency and stabilized antenna radiance becomes primary designing requirement.
Consider that antenna needs conformal on the conical surface, if feeder line is too thin, so will be fractureed than being easier in reality processing and debug process, so consider these problems, calculate according to microstrip line characteristic impedance design formula, at er=10.2, when dielectric substrate thickness is 0.6mm, input impedance is that micro-band of 50 Ω divides distribution (feeder line) width to be 0.6mm; Input impedance is that micro-band of 20 Ω divides distribution (feeder line) width to be 2.5mm.Obviously the feeder line when 20 Ω just compares and is not easy to be fractureed, so the input impedance of design cell is 20 Ω herein.
By making microstrip feed line go deep into the method for unit inside at left radiant body and right radiant body (antenna element) edge groove, can be good at the impedance operator of regulon, realizing the coupling of antenna element, and effectively can reduce the size of unit.
The feeding classification of microstrip antenna array mainly comprises series feed and presents, reflects front feed etc., T junction power splitter in parallelly feeding mode have structure simple, take up space little, easily realize the outstanding advantages such as broadband, therefore, adopt the parallelly feeding network be made up of T junction power splitter in design, divide distribution and feed-in pole to form by micro-band.Use constant amplitude homophase feeding classification.The input impedance of antenna element is 20 Ω, the input impedance of the total port of array is 50 Ω, so first will utilize λ/4 impedance transformation line, makes 20 Ω and 100 Ω matches impedances, approximate 45 Ω by the characteristic impedance calculating λ/4 impedance transformation transmission line, width is 0.7mm.
The size of antenna array greatly can be reduced by effective bending of feeding network and overall rational deployment.Carry out standing-wave ratio (VSWR) to antenna to measure.Can show that the bandwidth that the standing-wave ratio of antenna array is less than 2 is 9MHz, when operating frequency f0=1.575GHz, antenna array standing-wave ratio is 1.1.
The utility model has the advantage of: solve the problem of feeder due to meticulous frangibility by the input impedance of adjustment unit, and reduce cell size further and ensure that centre frequency when array element coupling is strong, and stabilize the radiance of antenna, achieve the engine request of horizontal omnidirectional radiation.We have developed conformal miniaturized GPS conformal array antenna experimental prototype on Rotary-table, and survey, and its measurement result achievement in research can be applicable to engineering reality, and has very high practical value and promotional value.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the utility model medium substrate flattens.
Schematic diagram when Fig. 2 is the work of the utility model medium substrate.
Reference numeral in figure is expressed as: 1, medium substrate, and 11, round platform small end face, 12, round platform large end face, 2, left radiant body, 3, right radiant body, 4, left feed-in minor matters, 5, right feed-in minor matters, 6, micro-band divides distribution, 7, feed-in pole.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
embodiment 1:
As depicted in figs. 1 and 2.
For the aerial signal transceiver of auto navigation, comprise medium substrate 1, medium substrate 1 is fan shape in flattening afterwards, medium substrate 1 is operationally in truncated conical shape, medium substrate 1 is when in truncated conical shape, the girth of the round platform small end face 11 of the medium substrate 1 of its truncated conical shape is 0.26 λ, the girth of the round platform large end face 12 of the medium substrate 1 of its truncated conical shape is 0.67 λ, λ is the wavelength of center of antenna frequency, medium substrate 1 is when in fan shape, the upper surface of medium substrate is provided with left radiant body 2 and right radiant body 3, left radiant body 2 and right radiant body 3 are all connected to feed-in pole 7 by microstrip conductor.
Medium substrate 1 is when in truncated conical shape, and the bus length of the medium substrate 1 of its truncated conical shape is 0.24 λ.
Medium substrate 1 adopts the high-k flexible media substrate of er=10.2.
The thickness of medium substrate 1 is h=0.6mm.
Left radiant body 2 and right radiant body 3 all have that well width is Ws, groove depth is the groove of Ls, described microstrip conductor comprises the left feed-in minor matters 4 inserted in left radiant body 2 groove and the right feed-in minor matters 5 inserted in left radiant body 2 groove, also comprise micro-band and divide distribution 6, micro-band divides the two ends of distribution to be connected with left radiant body 2 and right feed-in minor matters 5 respectively, and feed-in pole and micro-band divide the mid point of distribution to be connected.
The width of described left feed-in minor matters 4 and right feed-in minor matters 5 is all less than Ws.
Because astronomical cycle face area is minimum, antenna array can only adopt the micro-band conformal structure of Unit 2, array element cambered surface spacing is only 0.25 λ, much smaller than the half-wavelength of operating frequency of antenna, between array element, coupling is strong, and the radiation of antenna requirement horizontal omnidirectional, it is miniaturized that this makes Antenna Design realize, and ensures centre frequency and stabilized antenna radiance becomes primary designing requirement.
Consider that antenna needs conformal on the conical surface, if feeder line is too thin, so will be fractureed than being easier in reality processing and debug process, so consider these problems, calculate according to microstrip line characteristic impedance design formula, at er=10.2, when dielectric substrate thickness is 0.6mm, input impedance is that micro-band of 50 Ω divides distribution (feeder line) width to be 0.6mm; Input impedance is that micro-band of 20 Ω divides distribution (feeder line) width to be 2.5mm.Obviously the feeder line when 20 Ω just compares and is not easy to be fractureed, so the input impedance of design cell is 20 Ω herein.
By at left radiant body 2 and right radiant body 3(antenna element) edge groove makes microstrip feed line go deep into the method for unit inside, and can be good at the impedance operator of regulon, realize the coupling of antenna element, and effectively can reduce the size of unit.
The feeding classification of microstrip antenna array mainly comprises series feed and presents, reflects front feed etc., T junction power splitter in parallelly feeding mode have structure simple, take up space little, easily realize the outstanding advantages such as broadband, therefore, adopt the parallelly feeding network be made up of T junction power splitter in design, divide distribution and feed-in pole 7 to form by micro-band.Use constant amplitude homophase feeding classification.The input impedance of antenna element is 20 Ω, the input impedance of the total port of array is 50 Ω, so first will utilize λ/4 impedance transformation line, makes 20 Ω and 100 Ω matches impedances, approximate 45 Ω by the characteristic impedance calculating λ/4 impedance transformation transmission line, width is 0.7mm.
The size of antenna array greatly can be reduced by effective bending of feeding network and overall rational deployment.Carry out standing-wave ratio (VSWR) to antenna to measure.Can show that the bandwidth that the standing-wave ratio of antenna array is less than 2 is 9MHz, when operating frequency f0=1.575GHz, antenna array standing-wave ratio is 1.1.
As mentioned above, then well the utility model can be realized.
Claims (4)
1. for the aerial signal transceiver of auto navigation, it is characterized in that: comprise medium substrate (1), medium substrate (1) is fan shape in flattening afterwards, medium substrate (1) is operationally in truncated conical shape, medium substrate (1) is when in truncated conical shape, the girth of the round platform small end face (11) of the medium substrate (1) of its truncated conical shape is 0.26 λ, the girth of the round platform large end face (12) of the medium substrate (1) of its truncated conical shape is 0.67 λ, λ is the wavelength of center of antenna frequency, medium substrate (1) is when in fan shape, the upper surface of medium substrate is provided with left radiant body (2) and right radiant body (3), left radiant body (2) and right radiant body (3) are all connected to feed-in pole (7) by microstrip conductor.
2. the aerial signal transceiver for auto navigation according to claim 1, is characterized in that: medium substrate (1) is when in truncated conical shape, and the bus length of the medium substrate (1) of its truncated conical shape is 0.24 λ.
3. the aerial signal transceiver for auto navigation according to claim 1, is characterized in that: medium substrate (1) adopts the high-k flexible media substrate of er=10.2.
4. the aerial signal transceiver for auto navigation according to claim 1, is characterized in that: the thickness of medium substrate (1) is h=0.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520459219.8U CN204885424U (en) | 2015-07-01 | 2015-07-01 | A antenna signal transceiver for car navigation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520459219.8U CN204885424U (en) | 2015-07-01 | 2015-07-01 | A antenna signal transceiver for car navigation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204885424U true CN204885424U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520459219.8U Expired - Fee Related CN204885424U (en) | 2015-07-01 | 2015-07-01 | A antenna signal transceiver for car navigation |
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| CN (1) | CN204885424U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024151A (en) * | 2015-07-01 | 2015-11-04 | 成都众易通科技有限公司 | Automobile navigation antenna device |
| WO2021000181A1 (en) * | 2019-06-30 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Antenna device and vehicle-mounted apparatus |
-
2015
- 2015-07-01 CN CN201520459219.8U patent/CN204885424U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024151A (en) * | 2015-07-01 | 2015-11-04 | 成都众易通科技有限公司 | Automobile navigation antenna device |
| WO2021000181A1 (en) * | 2019-06-30 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Antenna device and vehicle-mounted apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20160701 |