CN207517881U - Antenna - Google Patents
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- CN207517881U CN207517881U CN201721611222.2U CN201721611222U CN207517881U CN 207517881 U CN207517881 U CN 207517881U CN 201721611222 U CN201721611222 U CN 201721611222U CN 207517881 U CN207517881 U CN 207517881U
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- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 33
- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 238000003012 network analysis Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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Abstract
The utility model discloses a kind of antennas, the antenna includes substrate, the substrate is equipped with antenna body, it is characterized in that, the antenna body includes microstripline, frequency band match circuit and the feed line for being connect with terminal device, and the feed line is connect through the frequency band match circuit with the microstripline；By increasing frequency band match circuit between microstripline and feed line, the clutter for influencing antenna conversion efficiency is filtered out through frequency band match circuit, so as to which the conversion efficiency for making antenna reaches highest.
Description
Technical Field
The utility model belongs to the technical field of wireless communication, concretely relates to antenna.
Background
The radio electromagnetic wave is ubiquitous in our lives, and while wireless communication products are popularized, the radio electromagnetic wave generated between the communication products also seriously interferes with the conversion efficiency of the communication product antenna, and the main reasons for the above problems are that: the antennas of communication products are all passive antennas, and most of the antennas are designed mainly by adopting built-in antennas, but the built-in antennas do not have the function of filtering clutter.
SUMMERY OF THE UTILITY MODEL
The utility model discloses main aim at provides a from antenna of taking frequency band matching circuit aims at solving the problem of filtering clutter.
In order to achieve the above object, the utility model provides an antenna, which comprises a substrate, be equipped with the antenna body on the base plate, the antenna body include microstrip line, frequency band matching circuit and supply with the feeder that is connected with terminal equipment, the feeder warp frequency band matching circuit with microstrip line connection.
Preferably, the band matching circuit is a high frequency or low frequency band matching circuit.
Preferably, the band matching circuit is a pi-type filter circuit, an L-type filter circuit, or a T-type filter circuit.
Preferably, the microstrip line includes a first microstrip line and a second microstrip line, the first microstrip line is a rectangular ring having a notch, the second microstrip line is disposed adjacent to the notch of the first microstrip line, the first microstrip line is grounded, and the first microstrip line and the second microstrip line are respectively connected to the band matching circuit.
Preferably, the microstrip line is an antenna planar radiator attached to the substrate.
Preferably, the second microstrip line includes a strip-shaped body and a plurality of gain portions arranged at intervals along a length direction of the body, and one end of the body is arranged adjacent to the notch of the first microstrip line.
Preferably, the body is divided into a first section, a second section and a third section along the length direction of the body, the adjacent two sections are arranged at intervals, the gain part is formed by the third section of the body protruding from the two sides of the body in the transverse direction, and the first section is connected with the feeder line.
Preferably, the number of the gain parts is three, and the gain parts are respectively a first gain part, a second gain part and a third gain part, the first gain part, the second gain part and the third gain part are sequentially arranged away from the notch of the first microstrip line, the plane area of the second gain part is larger than that of the first gain part, and the second gain part is smaller than that of the third gain part.
Preferably, the frequency band matching circuit includes a first resistor, a second resistor, a third resistor, a first capacitor, a first inductor, and a fourth resistor, one end of the first resistor is connected to the first segment, and the other end of the first resistor is connected to the second segment; the second resistor, the third resistor, the first capacitor and the fourth resistor are connected in parallel between the first section and the first microstrip line; one end of the first inductor is connected with the second section, and the other end of the first inductor is connected with the third section; or,
the frequency band matching circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first inductor and a second inductor, wherein one end of the first resistor is connected with the first section, and the other end of the first resistor is connected with the second section; the second resistor, the third resistor, the first capacitor and the second inductor are connected in parallel between the first section and the first microstrip line; one end of the first inductor is connected with the second section, and the other end of the first inductor is connected with the third section; or,
the frequency band matching circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first inductor and a second capacitor, wherein one end of the first resistor is connected with the first section, and the other end of the first resistor is connected with the second section; the second resistor, the third resistor, the first capacitor and the second capacitor are connected in parallel between the first section and the first microstrip line; one end of the first inductor is connected with the second section, and the other end of the first inductor is connected with the third section.
Preferably, the capacitor is an adjustable capacitor, and the inductor is an adjustable inductor.
The utility model discloses has following technological effect: (1) by adding a frequency band matching circuit between the microstrip line and the feeder line, clutter which affects the conversion efficiency of the antenna is filtered/filtered by the frequency band matching circuit, so that the conversion efficiency of the antenna is the highest; (2) a plurality of gain parts are convexly arranged on two sides of the second microstrip line to gain the antenna, so that the network coverage area is enlarged; (3) the capacitor and the inductor are both adjustable, and different types of antennas are matched by adjusting the resistance value and the inductance value, so that the built-in antenna can be shared.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to do no inventive work.
Fig. 1 is a schematic circuit block diagram of the antenna of the present invention;
fig. 2 is a schematic structural diagram of the antenna in fig. 1;
fig. 3 is a schematic structural diagram of an embodiment of the band matching circuit shown in fig. 2.
The numbers in the figures are shown in the following table:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Substrate | 10 | Antenna body |
| 15 | Microstrip line | 12 | Band matching circuit |
| 14 | Feed line | 18 | First microstrip line |
| 16 | Second microstrip line | 160 | Belt-shaped body |
| 161 | First stage | 162 | Second section |
| 163 | Third stage | 1630 | Gain section |
| 1630a | A first gain section | 1630b | A second gain section |
| 1630c | Third gain part | R1 | A first resistor |
| R2 | Second resistance | R3 | Third resistance |
| C1 | First capacitor | L1 | First inductor |
| R/L/C | Resistor/inductor/capacitor |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, if the description of the invention refers to "first", "second", etc. for descriptive purposes only, it is not to be interpreted as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an antenna can realize clutter in the filtering antenna, makes the conversion efficiency maximize of antenna.
Referring to fig. 1 and fig. 2, a schematic diagram of an embodiment of the present invention and a schematic structural diagram of an antenna are shown, the present invention discloses an antenna includes a substrate 1, an antenna body 10 is provided on the substrate 1, the antenna body 10 includes a microstrip line 15, a frequency band matching circuit 12 and a feeder 14 connected with a terminal device, the feeder 14 passes through the frequency band matching circuit 12 and the microstrip line 15 is connected.
When the antenna of the present embodiment is used in a terminal device, the feeder 14 thereof is used for connecting with the terminal device to realize signal input or output between the terminal device and the antenna. The band matching circuit 12 is used for matching a signal band corresponding to the antenna signal, i.e. filtering out unwanted noise in the antenna signal, so as to avoid the noise from affecting the working performance of the antenna.
In this embodiment, when the terminal device sends a signal to the outside through the antenna, the feeder 14 transmits the signal output by the terminal device to the band matching circuit 12, and the spurious signal from the terminal device is filtered by the band matching circuit 12 and then emitted by the microstrip line 15.
In contrast, when the terminal device receives an external signal through the antenna, first, the external wireless signal is received by the microstrip line 15, the spurious signal in the received wireless signal is filtered by the band matching circuit 12, and then transmitted to the terminal device by the feeder line 14.
It can be understood that, since the band matching circuit 12 can filter the transmitted signal regardless of whether the terminal device sends a signal to the outside through the antenna or the terminal device receives an external signal through the antenna, the received signal is stabilized, and thus the conversion efficiency of the antenna is improved.
In this embodiment, optionally, the band matching circuit 12 is a high-frequency or low-frequency band matching circuit 12. It should be noted that, in this embodiment, the band matching circuit 12 may select a corresponding high frequency or low frequency as needed to filter out an unnecessary high frequency spurious signal or a low frequency spurious signal in the signal, thereby achieving the effect of this patent.
Based on the above embodiments, in order to better achieve the filtering of the clutter in the antenna, the antenna conversion efficiency is maximized. Further, the frequency band matching circuit 12 of the present invention is a pi-type filter circuit, an L-type filter circuit, or a T-type filter circuit.
In an embodiment, the microstrip line 15 includes a first microstrip line 18 and a second microstrip line 16, the first microstrip line 18 is a rectangular ring having a notch, the second microstrip line 16 is disposed adjacent to the notch of the first microstrip line 18, the first microstrip line 18 is grounded, and the first microstrip line 18 and the second microstrip line 16 are respectively connected to the band matching circuit 12.
Specifically, referring to fig. 2, in this embodiment, the band matching circuit 12 is a pi filter circuit, an input terminal and/or an output terminal of the pi filter circuit is electrically connected to one end of the feeder line 14, and an output terminal and/or an input terminal of the pi filter circuit is electrically connected to the second microstrip line 16 and the first microstrip line 18, respectively.
In this embodiment, when the terminal device sends a signal to the outside or receives an external signal, and when the signal is sent from the terminal device, the pi filter circuit filters an unwanted clutter signal, i.e., an unwanted low-frequency signal or a high-frequency signal, and the second microstrip line 16 sends out the filtered stable signal, thereby improving the conversion efficiency of the antenna.
In this embodiment, when the terminal device receives signals to the outside, the second microstrip line 16 transmits the signals received from the outside to the pi filter circuit, and the pi filter circuit filters unwanted clutter signals received from the outside, i.e., unwanted low-frequency signals or high-frequency signals, and transmits the unwanted clutter signals to the terminal device, so that the transmitted and received signals are stable, and the conversion efficiency of the antenna is improved.
It should be understood that the second microstrip line is used for signal transmission, external reception of a clutter signal, and external transmission of a steady signal.
It should be noted that the band matching circuits such as the high frequency/low frequency filter L type, T type or double T type in the band matching circuit 12 described in the above embodiments are also the basic principle of the electronic circuit industry, the object of the present invention is not limited to the pi type filter circuit shown in the above embodiments and the drawings, it should be clear to those skilled in the art that the band matching circuits such as the high frequency/low frequency filter L type, T type or double T type are also applicable to the present invention, the present invention combines the multiple design principles of the antenna of microwave communication with the multiple design principles of the electronic circuit matching, and integrates them into the antenna, so as to solve the problem faced in the wireless built-in antenna industry at present.
Based on the above embodiment, referring to fig. 2, in order to increase the gain of the antenna and increase the coverage of the network, further, the microstrip line 15 is an antenna planar radiator attached to the substrate 1, that is, the antenna radiates in all directions on a horizontal plane. In addition, the second microstrip line 16 includes a strip-shaped body 160 and a plurality of gain sections 1630 spaced apart along the length direction of the body 160, and one end of the body is disposed adjacent to the notch of the first microstrip line 18, so that the gain of the antenna can be improved by the above-mentioned structural design.
Furthermore, the body 160 is divided into a first segment 161, a second segment 162 and a third segment 163 along the length direction thereof, and the adjacent two segments are spaced apart from each other, the gain part 1630 is formed by the third segment 163 of the body protruding from both lateral sides of the body, and the first segment 161 is connected to the feeder line 14.
Furthermore, the number of the gain sections 1630 is three, and the gain sections are a first gain section 1630a, a second gain section 1630b and a third gain section 1630c, the first gain section 1630a, the second gain section 1630b and the third gain section 1630c are sequentially disposed away from the notch of the first microstrip line 18, the planar area of the second gain section 1630b is larger than that of the first gain section 1630a, and the second gain section 1630b is smaller than that of the third gain section 1630 c.
Furthermore, the antenna also comprises an antenna element, and through the design of the circuit, the currents passing through the antenna element are in the same phase to form an 'antenna array' which is vertical to the ground and is arranged in a straight line along an axis, the radiation field pattern of the antenna can be squeezed to be flatter through the antenna array, and the flatter the field pattern, the higher the gain of the antenna.
Furthermore, it should be noted that the utility model discloses in microstrip line 15's shape do not do specifically limit, microstrip line 15's circuit can design into arbitrary shape according to the matching demand of antenna, as long as satisfy the matching demand of antenna, guarantee the conversion efficiency of antenna can.
Based on any of the above-mentioned embodiments, for realizing the built-in antenna sharing, do the circuit matching to the model of difference, the utility model discloses frequency band matching circuit 12 can comprise passive element resistance, electric capacity and inductance.
Specifically, referring to fig. 2 and fig. 3, in an embodiment, the band matching circuit 12 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a first inductor L1, and a fourth resistor, one end of the first resistor R1 is connected to the first segment 161, and the other end of the first resistor R1 is connected to the second segment 162; the second resistor R2, the third resistor R3, the first capacitor C1 and the fourth resistor are connected in parallel between the first segment 161 and the first microstrip line 18; one end of the first electrical inductor L1 is connected to the second segment 162, and the other end of the first electrical inductor L1 is connected to the third segment 163. And, the electric capacity can also be further set up as adjustable electric capacity, the inductance can also be further set up as adjustable inductance.
In another embodiment, the band matching circuit 12 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a first electrical inductance L1, and a second inductance, one end of the first resistor R1 is connected to the first segment 161, and the other end of the first resistor R1 is connected to the second segment 162; the second resistor R2, the third resistor R3, the first capacitor C1 and the second inductor are connected in parallel between the first segment 161 and the first microstrip line 18; one end of the first electrical inductor L1 is connected to the second segment 162, and the other end of the first electrical inductor L1 is connected to the third segment 163.
In yet another embodiment, the band matching circuit 12 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a first electrical inductor L1, and a second capacitor, one end of the first resistor R1 is connected to the first segment 161, and the other end of the first resistor R1 is connected to the second segment 162; the second resistor R2, the third resistor R3, the first capacitor C1 and the second capacitor are connected in parallel between the first segment 161 and the first microstrip line 18; one end of the first electrical inductor L1 is connected to the second segment 162, and the other end of the first electrical inductor L1 is connected to the third segment 163.
It should be noted that any one of the resistor R/inductor L/capacitor C and the band matching circuit 12 may form a pi-type filter circuit; of course, the band matching circuit 12 may also be an L-type filter circuit, a T-type filter circuit, or a double T-type filter circuit.
Further, the terminal device may have a network analysis function, or a network analyzer may be additionally used to test the voltage standing wave ratio of the band matching circuit 12 in the above embodiments, and taking the terminal device having the network analysis function as an example, the voltage standing wave ratio testing method of the band matching circuit 12 in this patent is specifically described as follows:
during testing, the feeder line 14 is connected with a network analysis interface of the terminal equipment, impedance matching is carried out by using a Smith chart measured by a network analysis function of the terminal equipment, the matching degree of the antenna and the model is obtained according to a measured impedance matching result, and a corresponding resistance value and a corresponding capacitance value are matched.
It should be understood that the frequency band matching circuit 12 is replaced by any one of an L-type filter circuit, a T-type filter circuit, or a double-T-type filter circuit, which is also suitable for the above impedance matching, and a corresponding resistance value and a capacitance value are matched, so that the effect of matching and sharing the internal antenna is achieved by adjusting the resistance value and the capacitance value.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. The antenna comprises a substrate, wherein an antenna body is arranged on the substrate, and the antenna is characterized in that the antenna body comprises a microstrip line, a frequency band matching circuit and a feeder line connected with terminal equipment, and the feeder line is connected with the microstrip line through the frequency band matching circuit.
2. The antenna of claim 1, wherein the band matching circuit is a high frequency or low frequency band matching circuit.
3. The antenna of claim 2, wherein the band matching circuit is a pi filter circuit or an L filter circuit or a T filter circuit.
4. The antenna according to any one of claims 1 to 3, wherein the microstrip line includes a first microstrip line and a second microstrip line, the first microstrip line is a rectangular loop having a notch, the second microstrip line is disposed adjacent to the notch of the first microstrip line, the first microstrip line is grounded, and the first microstrip line and the second microstrip line are respectively connected to the band matching circuit.
5. The antenna of claim 4, wherein the microstrip line is an antenna planar radiator attached to the substrate.
6. The antenna of claim 5, wherein the second microstrip line comprises a strip-shaped body and a plurality of gain portions spaced along a length of the body, and one end of the body is disposed adjacent to the notch of the first microstrip line.
7. The antenna of claim 6, wherein the body is divided into a first section, a second section and a third section along the length direction of the body, and the adjacent two sections are spaced apart from each other, the gain portion is formed by the third section of the body protruding from both lateral sides of the body, and the first section is connected to the feeder line.
8. The antenna of claim 7, wherein the number of the gain sections is three, and the gain sections are a first gain section, a second gain section and a third gain section, the first gain section, the second gain section and the third gain section are sequentially disposed away from the notch of the first microstrip line, the planar area of the second gain section is larger than that of the first gain section, and the second gain section is smaller than that of the third gain section.
9. The antenna of claim 7, wherein the band matching circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first inductor, and a fourth resistor, one end of the first resistor is connected to the first segment, and the other end of the first resistor is connected to the second segment; the second resistor, the third resistor, the first capacitor and the fourth resistor are connected in parallel between the first section and the first microstrip line; one end of the first inductor is connected with the second section, and the other end of the first inductor is connected with the third section; or,
the frequency band matching circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first inductor and a second inductor, wherein one end of the first resistor is connected with the first section, and the other end of the first resistor is connected with the second section; the second resistor, the third resistor, the first capacitor and the second inductor are connected in parallel between the first section and the first microstrip line; one end of the first inductor is connected with the second section, and the other end of the first inductor is connected with the third section; or,
the frequency band matching circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first inductor and a second capacitor, wherein one end of the first resistor is connected with the first section, and the other end of the first resistor is connected with the second section; the second resistor, the third resistor, the first capacitor and the second capacitor are connected in parallel between the first section and the first microstrip line; one end of the first inductor is connected with the second section, and the other end of the first inductor is connected with the third section.
10. The antenna of claim 9, wherein the first capacitor and the second capacitor are tunable capacitors, and the first inductor and the second inductor are tunable inductors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721611222.2U CN207517881U (en) | 2017-11-27 | 2017-11-27 | Antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721611222.2U CN207517881U (en) | 2017-11-27 | 2017-11-27 | Antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207517881U true CN207517881U (en) | 2018-06-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721611222.2U Active CN207517881U (en) | 2017-11-27 | 2017-11-27 | Antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207517881U (en) |
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2017
- 2017-11-27 CN CN201721611222.2U patent/CN207517881U/en active Active
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