CN106299669A - The satellite digital broadcasting antenna of directional diagram tuning - Google Patents
The satellite digital broadcasting antenna of directional diagram tuning Download PDFInfo
- Publication number
- CN106299669A CN106299669A CN201610877097.3A CN201610877097A CN106299669A CN 106299669 A CN106299669 A CN 106299669A CN 201610877097 A CN201610877097 A CN 201610877097A CN 106299669 A CN106299669 A CN 106299669A
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- China
- Prior art keywords
- radiant body
- antenna
- vertical
- minor matters
- digital broadcasting
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 title claims abstract description 29
- 230000003071 parasitic effect Effects 0.000 claims abstract description 47
- 230000010287 polarization Effects 0.000 claims abstract description 25
- 239000000758 substrate Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/01—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the shape of the antenna or antenna system
Abstract
The present invention proposes the satellite digital broadcasting antenna of a kind of directional diagram tuning, including: microstrip antenna main body, there is a radiant body；One parasitic minor matters, one end is connected on described radiant body, the overall length of parasitic minor matters makes its operation wavelength identical with the operation wavelength of radiant body, and its attitude is configured to produce vertical current or the vertical component of electric current, the vertical component of described vertical current or electric current is perpendicular to the horizontal current of described radiant body, to strengthen the vertical polarization gain of antenna.Antenna radiation pattern can highly desirable quickly be tuned by the present invention, balances its circular polarisation and vertical polarization is distributed, and do not affect resonance and the efficiency of microstrip antenna self, more meet the specification requirement to antenna.
Description
Technical field
The present invention relates to microstrip antenna technology, particularly to be a kind of directional diagram tuning satellite digital broadcasting antenna.
Background technology
Sirius satellite digit broadcasting system has a wide range of applications in the U.S., and it utilizes satellite broadcasting and terrestrial broadcasting phase
In conjunction with mode, have good reception in city and suburb.But due to it need to take into account simultaneously satellite reception and
Ground station reception, thus antenna is proposed the highest requirement.Up-to-date SX-9845-0105-03 specification (hereinafter referred to as " rule
Lattice ") propose the outer requirement of harsh band especially.
Current Sirius satellite digital broadcast antenna mainly has a period of time type, circular ring type, microstrip type, and microstrip type is due to knot
Structure is simple, section is low, feed is convenient, is widely used.The bandwidth that new specification requirement is narrower, to reduce band
The impact of the antennas such as outer LTE, microstrip antenna just presents bigger advantage.
Sirius satellite Digital Broadcasting Receiver antenna requirement has preferable left-hand circular polarization gain on the high elevation angle, and low
There is higher vertical polarization gain, in order to accept satellite-signal and ground base station signal on the elevation angle simultaneously.Microstrip antenna itself
Gain profiles is relevant with the size of antenna, and the gain profiles of antenna is also had significant effect by the installation environment of antenna simultaneously.
In actual applications, the gain profiles to adjustment microstrip antenna can only be by changing dielectric constant or etch figures(s)
Case is to affecting its Net long wave radiation size, but any scheme all wastes time and energy, and high dielectric constant and complexity
Etch plot can reduce the radiation efficiency of antenna itself.
Summary of the invention
The technical problem to be solved is to provide the satellite digital broadcasting antenna of a kind of directional diagram tuning, Ke Yishi
Divide and effectively antenna radiation pattern is quickly tuned, balance its circular polarisation and vertical polarization distribution, and do not affect microstrip antenna
The resonance of self and efficiency, more meet the specification requirement to antenna.
For solving the problems referred to above, the present invention proposes the satellite digital broadcasting antenna of a kind of directional diagram tuning, including:
Microstrip antenna main body, has a radiant body；
One parasitic minor matters, one end is connected on described radiant body, and the overall length of parasitic minor matters makes its operation wavelength and radiant body
Operation wavelength identical, and its attitude is configured to produce vertical current or the vertical component of electric current, described vertical current or
The vertical component of electric current is perpendicular to the horizontal current of described radiant body, to strengthen the vertical polarization gain of antenna.
According to one embodiment of present invention, described parasitic minor matters are L-type minor matters, including vertical component and horizontal component,
First end of described vertical component and the first end of described horizontal component, the second end of described vertical component connects described radiation
Body, vertical or there is certain angle of inclination between described vertical component with described radiant body, with produce described vertical current or
The vertical component of electric current.
According to one embodiment of present invention, regulate the length ratio of described vertical component and horizontal component, to change sky
Line circular polarisation gain and the distribution of vertical polarization gain, vertical component the longest vertical polarization gain is the highest.
According to one embodiment of present invention, time in described horizontal component orthographic projection to radiant body plane, the level of projection
Part is without departing from radiant body scope, to reduce the interference to the horizontal current on radiant body.
According to one embodiment of present invention, the second end of described horizontal component is provided towards the centrage of radiant body.
According to one embodiment of present invention, parasitic minor matters are connected to the edge of radiant body or near edge.
According to one embodiment of present invention, parasitic minor matters are connected on the distributing point of radiant body.
According to one embodiment of present invention, overall length is place resonance point 1/4th ripples of described parasitic minor matters
Long.
According to one embodiment of present invention, described microstrip antenna main body includes: medium substrate；Radiant body, is arranged at institute
State the upper surface of medium substrate；And antenna ground, it is arranged at the lower surface of described medium substrate.
After using technique scheme, the present invention has the advantages that the master at microstrip antenna compared to existing technology
Arranging parasitic minor matters on body, the overall length of parasitic minor matters makes its operation wavelength identical with the operation wavelength of radiant body, works in same
On resonance point, electric current flows upwardly in parasitic minor matters, it is ensured that the electric current in parasitic minor matters is vertical current or electric current has vertically
Component, can increase vertical polarization gain, the circular polarisation of balancing antenna and vertical polarization gain profiles, to some extent by posting
Raw minor matters adjust the gain profiles of microstrip antenna, and without effective to affecting it by changing dielectric constant or etched pattern
Radiation size, the most effectively, does not destroy resonance and the polarization characteristic of antenna itself, it is to avoid prior art wastes time and energy, high
Dielectric constant and complicated etch plot can reduce the problems such as the radiation efficiency of antenna itself, before having the most wide application
Scape.
Accompanying drawing explanation
Fig. 1 is the structural representation of the satellite digital broadcasting antenna of the directional diagram tuning of the embodiment of the present invention；
Fig. 2 is the return loss contrast schematic diagram of the satellite digital broadcasting antenna of the directional diagram tuning of the embodiment of the present invention；
Fig. 3 is efficiency comparative's schematic diagram of the satellite digital broadcasting antenna of the directional diagram tuning of the embodiment of the present invention；
Fig. 4 is the satellite digital broadcasting antenna of the directional diagram tuning of embodiment of the present invention gain contrast in different angles
Schematic diagram.
Detailed description of the invention
Understandable, below in conjunction with the accompanying drawings to the present invention for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from
Detailed description of the invention be described in detail.
Elaborate a lot of detail in the following description so that fully understanding the present invention.But the present invention can be with
Much being different from alternate manner described here to implement, those skilled in the art can be in the situation without prejudice to intension of the present invention
Under do similar popularization, therefore the present invention is not limited by following public being embodied as.
The satellite digital broadcasting antenna of the directional diagram tuning of the embodiment of the present invention, for the improvement to existing microstrip antenna, bag
Include: microstrip antenna main body 1 and parasitic minor matters 2.In the case of antenna need not set up function or improve other performances,
Can only set parasitic minor matters described by the embodiment of the present invention in microstrip antenna main body 1, realize antenna radiation pattern with this
Quickly tuning, and without arranging the etching curve of high dielectric constant or complexity, the most without limitation, it is also possible in micro-strip sky
Miscellaneous part is set in line main body 1, or microstrip antenna main body 1 is changed.
Microstrip antenna main body 1 has a radiant body 11, and this radiant body 11 can be arbitrarily for realizing satellite digital broadcasting
The radiant body of the microstrip antenna of antenna.Referring to Fig. 1, in one embodiment, microstrip antenna main body 1 includes: medium substrate 12, spoke
Beam 11 and antenna ground (not shown).Radiant body 11 is arranged at the upper surface of medium substrate 12, is arranged at medium antenna
The lower surface of substrate 12.Radiant body 11 is provided with distributing point 111.Medium substrate 12 can be common medium substrate, such as
Can be ceramic substrate, but be not restricted to this.
One end of parasitic minor matters 2 is connected on radiant body 11, and the embodiment of the present invention refers to bag for the description of radiant body 11
Contain the radiant body 11 of distributing point 111.The overall length of parasitic minor matters 2 makes the operation wavelength of parasitic minor matters 2 and the work of radiant body 11
Wavelength is identical, is operated on same resonance point.The attitude of parasitic minor matters 2 is configured to produce the vertical of vertical current or electric current
The vertical component of component, vertical current or electric current is perpendicular to the horizontal current of radiant body, to strengthen the vertical polarization gain of antenna,
Thus the distribution on the directional diagram of tuned antenna so that it is requirement more up to specification.The attitude of parasitic minor matters 2 includes parasitic minor matters 2
Shape itself and arrange relative to the position of radiant body 11, arrange towards etc..
In a preferred embodiment, parasitic minor matters 2 are L-type minor matters, including the vertical component 21 being mutually connected vertically
With horizontal component 22.The most without limitation, can be the deformation minor matters of L-type minor matters, such as vertical component 21 and horizontal part
Dividing the angle between 22 is not right angle etc., or the minor matters of other shapes, as long as ensureing to flow upwardly to parasitic minor matters 2 from radiant body 11
Electric current there is the vertical component being perpendicular to radiant body horizontal current.But L-type directly can ensure that hanging down of parasitic minor matters 2
While the electric current of straight part 21 is exactly perpendicularly to the horizontal current (being formed at the circular current on radiant body 11) of radiant body 11, water
The electric current of flat part 22 is completely parallel to the horizontal current (plane) of radiant body 11, is balanced optimal circular polarisation gain and hangs down
The distribution of straight polarized gain adjusts.
Referring to Fig. 1, in L-type minor matters, the first end of vertical component 21 and the first end of horizontal component 22, vertical component 21
Second end connects radiant body 11, and the second end of horizontal component 22 is freely without connecting.L-type minor matters are except the second termination of vertical component 21
Touching outside radiant body 11, remaining is respectively positioned on the top of radiant body 11, is preferably surface.Between vertical component 21 and radiant body 11
Vertical or there is certain inclination angle, to produce the vertical component of vertical current or electric current.L-type minor matters are carried in radiant body 11
On, in the current distributing on radiant body 11 to L-type minor matters, toward upper in vertical component 21.The base material of parasitic minor matters 2 is for leading
Body, such as, can be metal minor matters or other conductor minor matters.
Further, regulation the vertical component 21 and length ratio of horizontal component 22, with change antenna circular polarisation gain with
The distribution of vertical polarization gain, vertical component 21 the longest vertical polarization gain is the highest, vertical component 21 and horizontal component 22 total
Long constant.In one embodiment, the bending part that L-type minor matters can be set to vertical component 21 and horizontal component 22 can
Adjust, thus regulate the length of vertical component 21, it is achieved the fast tunable of directional diagram.Or, L-type minor matters can shape after shaping
Shape is immutable, and when needs retune directional diagram, changes the L-type minor matters of different length ratio.
It is also preferred that the left horizontal component 22 orthographic projection is to time in radiant body 11 plane, the horizontal component of projection is without departing from radiant body
11 scopes, say, that horizontal component 22 is fully located at the surface of radiant body 11, to reduce the level electricity on radiant body 11
The interference of stream.Electric current on horizontal component 22 is also level, when scope directly over horizontal component 22 is beyond radiant body 11, and meeting
Horizontal current on interference radiant body 11 to a certain extent.Preferably, the second end of horizontal component 22 is provided towards radiant body
The centrage of 11, so can vacate space directly over bigger radiant body 11, arrange horizontal component 22, it is to avoid horizontal component
22 beyond scope directly over radiant body 11.Certainly, when the second end of vertical component 21 is positioned at the center of radiant body 11, water
Flat part towards arbitrarily.
So that antenna has the tunable space of larger range of directional diagram, and ensure that horizontal component 22 is without departing from radiation
Scope directly over body 11, parasitic minor matters 2 are connected to the edge of radiant body 11 or near edge, thus horizontal component 22
Having longer space development, the adjustable extent of length is wider.
It is also preferred that the left referring to Fig. 1, parasitic minor matters 2 can be connected on the distributing point 111 of radiant body 11, raw for ease of reality
Producing processing, the feed placement of parasitic L-type minor matters position and microstrip antenna main body 1 itself is consistent, can be by modes such as welding
Connect, but without limitation.
In a preferred embodiment, overall length is place resonance point 1/4th wavelength of parasitic minor matters 2, i.e. four
/ mono-resonance wavelength, it is of course possible to there is certain range of error, parasitic minor matters 2 are operated in same humorous with radiant body 11
On vibration frequency.So overall length more meets the resonant frequency of the satellite digital broadcasting antenna micro strip antenna that existing conventional directional diagram tunes
(or operation wavelength), but it is not restricted to this, when the operating frequency of microstrip antenna main body 1 changes, parasitism minor matters 2 overall length becomes therewith
Change.
In a specific embodiment, with a length of 15mm and a length of 20mm of parasitic minor matters 2 vertical component 21 and
As a example by being not added with parasitic minor matters 2, provide corresponding return loss and change in gain.It is the length of vertical component 21 referring to Fig. 2, waveform A
Degree is return loss during 20mm, and waveform B is return loss during a length of 15mm of vertical component 21, and waveform C is without parasitic
Return loss under minor matters load condition, it is seen that the loss of vertical component 21 length more long echo is the least, and set up parasitic minor matters 2 with
Not setting parasitic minor matters situation, to compare return loss lower.Referring to Fig. 3, be followed successively by from top to bottom a length of 20mm of vertical component 21,
Being not added with antenna radiation efficiency when parasitic minor matters, vertical component 21 a length of 15mm, radiation efficiency is essentially identical.From Fig. 2 and Fig. 3
In it can be seen that add the parasitic minor matters of different vertical length and do not add the antenna resonance of minor matters and radiation efficiency is basic
Unanimously.
Referring to Fig. 4, in coordinate system, 0～20 ° is low elevation angle part, and 20～90 ° is high elevation angle part, between the two to draw
Separated time S is split, and the waveform of low elevation angle part is vertical polarization gain, and the waveform of high elevation angle part is circular polarisation gain.Face upward low
In angle part, in the case of not having parasitic minor matters 2 to load, vertical polarization gain is minimum in the case of not setting parasitic minor matters 2, adds
If in the case of parasitic minor matters 2, the vertical polarization gain of vertical component 21 length 20mm is higher than vertical component 21 length 15mm
Vertical polarization gain, it is seen then that vertical polarization gain increases with the increase of the length of vertical component 21, more meets index specification and wants
Evaluation.In the part of the high elevation angle, along with the increase of vertical component 21 length, although circular polarisation gain is reducing, but is still
Exceed index specification requirement value.Therefore, it can be seen that after adding parasitic minor matters 2, the vertical polarization of antenna low elevation angle part
(linear polarization) gain is obviously improved, and rises, the circular polarisation gain of high elevation angle part along with the increase of vertical component 21 height
Decline therewith, but requirement the most up to specification, and parasitic minor matters 2 serve tuned antenna directional diagram, and balance vertical
The effect that polarization is distributed with circular polarisation.Actual application can (or be referred to as by adjusting vertical component 21 height according to demand
Length) quickly meet index.
Although the present invention is open as above with preferred embodiment, but it is not for limiting claim, any this area
Technical staff without departing from the spirit and scope of the present invention, can make possible variation and amendment, therefore the present invention
Protection domain should be defined in the range of standard with the claims in the present invention.
Claims (9)
1. the satellite digital broadcasting antenna of a directional diagram tuning, it is characterised in that including:
Microstrip antenna main body, has a radiant body；
One parasitic minor matters, one end is connected on described radiant body, and the overall length of parasitic minor matters makes the work of its operation wavelength and radiant body
Make wavelength identical, and its attitude is configured to produce vertical current or the vertical component of electric current, described vertical current or electric current
Vertical component be perpendicular to the horizontal current of described radiant body, to strengthen the vertical polarization gain of antenna.
2. the satellite digital broadcasting antenna of directional diagram tuning as claimed in claim 1, it is characterised in that described parasitic minor matters are
L-type minor matters, including vertical component and horizontal component, the first end of described vertical component and the first end of described horizontal component, institute
The second end stating vertical component connects described radiant body, vertical or exist certain between described vertical component with described radiant body
Angle of inclination, to produce the vertical component of described vertical current or electric current.
3. the satellite digital broadcasting antenna of directional diagram tuning as claimed in claim 2, it is characterised in that regulate described vertical component effect
Dividing and the length ratio of horizontal component, to change the distribution of antenna circular polarisation gain and vertical polarization gain, vertical component is the longest
Vertical polarization gain is the highest.
4. the satellite digital broadcasting antenna of directional diagram tuning as claimed in claim 2, it is characterised in that described horizontal component is just
When projecting in radiant body plane, the horizontal component of projection is without departing from radiant body scope, to reduce the level electricity on radiant body
The interference of stream.
5. the satellite digital broadcasting antenna of directional diagram tuning as claimed in claim 4, it is characterised in that described horizontal component
Second end is provided towards the centrage of radiant body.
6. the satellite digital broadcasting antenna of directional diagram tuning as claimed in claim 5, it is characterised in that parasitic minor matters are connected to
The edge of radiant body or close edge.
7. the satellite digital broadcasting antenna of the directional diagram tuning as described in claim 1 or 6, it is characterised in that parasitic minor matters are even
It is connected on the distributing point of radiant body.
8. the satellite digital broadcasting antenna of directional diagram tuning as claimed in claim 1 or 2, it is characterised in that described parasitic branch
Overall length is place resonance point 1/4th wavelength of joint.
9. the satellite digital broadcasting antenna of directional diagram tuning as claimed in claim 1, it is characterised in that described microstrip antenna master
Body includes: medium substrate；Radiant body, is arranged at the upper surface of described medium substrate；And antenna ground, it is arranged at described medium substrate
Lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877097.3A CN106299669A (en) | 2016-09-30 | 2016-09-30 | The satellite digital broadcasting antenna of directional diagram tuning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877097.3A CN106299669A (en) | 2016-09-30 | 2016-09-30 | The satellite digital broadcasting antenna of directional diagram tuning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106299669A true CN106299669A (en) | 2017-01-04 |
Family
ID=57716759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610877097.3A Pending CN106299669A (en) | 2016-09-30 | 2016-09-30 | The satellite digital broadcasting antenna of directional diagram tuning |
Country Status (1)
| Country | Link |
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| CN (1) | CN106299669A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110437A (en) * | 2017-12-18 | 2018-06-01 | 东莞市合康电子有限公司 | Minimize tunable GPS antenna device and its production technology |
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| JPH0993011A (en) * | 1995-09-28 | 1997-04-04 | Yagi Antenna Co Ltd | Antenna system |
| JPH09191211A (en) * | 1996-01-09 | 1997-07-22 | Furuno Electric Co Ltd | Circularly polarized wave patch antenna |
| JP2005020301A (en) * | 2003-06-25 | 2005-01-20 | Maspro Denkoh Corp | Antenna for common use of two polarized waves |
| TWI268008B (en) * | 2005-09-15 | 2006-12-01 | Advanced Connectek Inc | Diversity antenna |
| CN101194441A (en) * | 2005-04-07 | 2008-06-04 | 索尼爱立信移动通讯股份有限公司 | Antenna arrangement |
| DE102010015823A1 (en) * | 2010-04-21 | 2011-10-27 | Continental Automotive Gmbh | Antenna module for vehicle, has feeding pin extended to top surface of substrate, where pin has pin extension extending over patch antenna surface, which forms antenna structure for radiating or receiving electromagnetic waves |
| CN104718663A (en) * | 2012-07-04 | 2015-06-17 | 日本电业工作株式会社 | Vertically polarized wave antenna |
| CN105742792A (en) * | 2014-12-11 | 2016-07-06 | 公安部第一研究所 | Circular polarized antenna capable of realizing horizontal all-direction radiation |
| CN206076498U (en) * | 2016-09-30 | 2017-04-05 | 上海安费诺永亿通讯电子有限公司 | The satellite digital broadcasting antenna of directional diagram tuning |
-
2016
- 2016-09-30 CN CN201610877097.3A patent/CN106299669A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993011A (en) * | 1995-09-28 | 1997-04-04 | Yagi Antenna Co Ltd | Antenna system |
| JPH09191211A (en) * | 1996-01-09 | 1997-07-22 | Furuno Electric Co Ltd | Circularly polarized wave patch antenna |
| JP2005020301A (en) * | 2003-06-25 | 2005-01-20 | Maspro Denkoh Corp | Antenna for common use of two polarized waves |
| CN101194441A (en) * | 2005-04-07 | 2008-06-04 | 索尼爱立信移动通讯股份有限公司 | Antenna arrangement |
| TWI268008B (en) * | 2005-09-15 | 2006-12-01 | Advanced Connectek Inc | Diversity antenna |
| DE102010015823A1 (en) * | 2010-04-21 | 2011-10-27 | Continental Automotive Gmbh | Antenna module for vehicle, has feeding pin extended to top surface of substrate, where pin has pin extension extending over patch antenna surface, which forms antenna structure for radiating or receiving electromagnetic waves |
| CN104718663A (en) * | 2012-07-04 | 2015-06-17 | 日本电业工作株式会社 | Vertically polarized wave antenna |
| CN105742792A (en) * | 2014-12-11 | 2016-07-06 | 公安部第一研究所 | Circular polarized antenna capable of realizing horizontal all-direction radiation |
| CN206076498U (en) * | 2016-09-30 | 2017-04-05 | 上海安费诺永亿通讯电子有限公司 | The satellite digital broadcasting antenna of directional diagram tuning |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110437A (en) * | 2017-12-18 | 2018-06-01 | 东莞市合康电子有限公司 | Minimize tunable GPS antenna device and its production technology |
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Application publication date: 20170104 |