CN205752530U - 433MHz planar inverted-F antenna without lamped element coupling - Google Patents
433MHz planar inverted-F antenna without lamped element coupling Download PDFInfo
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- CN205752530U CN205752530U CN201620437272.2U CN201620437272U CN205752530U CN 205752530 U CN205752530 U CN 205752530U CN 201620437272 U CN201620437272 U CN 201620437272U CN 205752530 U CN205752530 U CN 205752530U
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- medium substrate
- minor matters
- short circuit
- antenna body
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Abstract
433MHz planar inverted-F antenna without lamped element coupling of the present utility model, including FR44 medium substrate, on the plane earth of described FR44 medium substrate, antenna body is installed, short circuit ground and button, described first antenna end minor matters and the second antenna end minor matters are each attached to one end of FR44 medium substrate, the double minor matters structure of antenna end improves the bandwidth of operation of antenna body, the described side being positioned at FR44 medium substrate short-circuitly, short circuit is provided with on the ground and compensates distributed capacitor with short-circuit the flat board electrically connected, short circuit ground is connected with the other end thread of antenna body, and there is match circuit on short circuit ground with being connected between antenna body, described match circuit is provided with antenna input, described button is connected with antenna input.Flat board of the present utility model compensates distributed capacitor, it is achieved that the impedance matching that the inductive component of PIFA is good, and double minor matters structures improve the noise that the bandwidth of operation of antenna body, the development cost of low antenna body and lump components and parts bring.
Description
Technical field
This utility model relates to microwave engineering techniques field, a kind of 433MHz plane inverse-F without lamped element coupling
Antenna.
Background technology
433MHz is that the application section of exempting from of country launches reception frequency, and has penetrance by force, the advantages such as communication distance is remote, institute
To be widely used in the systems such as Smart Home, wireless monitor, personal communication and RF identification.
Common 433MHz antenna design method: for a wireless system design, need the important problem considered
It is exactly the design problem of antenna, and Antenna Design needs to consider the problems such as frequency band, impedance, gain.Simplest is whiplike sky
Line, but owing to its quarter-wave antennas orthogonal of needs is on ground level, so installing at mini-system and being integrated with
The biggest difficulty.Being compared to the weakness of whip antenna, microstrip antenna then can preferably be integrated in low power wireless system,
Thus be widely used in low power wireless system.But general microstrip antenna bandwidth is the most narrow, impedance matching ratio
More complicated.
Existing frequently-used main flow antenna is planar inverted-F antenna (PIFA), and the feature of its maximum is that size is little, lightweight, cuts open
The features such as face is low, bandwidth, efficiency are high, gain is high and anti-interference is good, are the most also widely used.Though
So conventional planar inverse-F antenna (PIFA) has good advantage, but in terms of radiation efficiency with impedance matching performance is not
Highly desirable.
Utility model content
The purpose of this utility model is to provide a kind of 433MHz planar inverted-F antenna without lamped element coupling, on solving
State the problem proposed in background technology.
For achieving the above object, the following technical scheme of this utility model offer:
Without the 433MHz planar inverted-F antenna of lamped element coupling, including FR4 medium substrate, described FR4 medium substrate
Be provided with on plane earth antenna body, short circuit and button, one end thread of described antenna body connects first antenna end
Minor matters, described first antenna end minor matters thread connects the second antenna end minor matters, described first antenna end minor matters and the
Two antenna end minor matters are each attached to one end of FR4 medium substrate, and the double minor matters structure of antenna end improves the work of antenna body
Make bandwidth；
The described side being positioned at FR4 medium substrate, described short circuit is provided with on the ground mends with short-circuit the flat board electrically connected short-circuitly
Repaying distributed interdigital capacitor, described flat board compensates distributed interdigital capacitor and is fixed on the FR4 medium substrate near side, short circuit ground
On, flat board compensates distributed interdigital capacitor and improves the capacitive component of input impedance, compensates the inductive component of antenna body PIFA
Realizing good impedance matching, described short circuit ground is connected with the other end thread of antenna body, and short circuit and antenna body it
Between connect and have match circuit, described match circuit to be provided with antenna input, and match circuit is laid on FR4 medium substrate
In trough；
Described button is positioned at the middle part of FR4 medium substrate, and button is connected with antenna input.
Preferably, the size of described FR44 medium substrate is 48 × 30 × 2mm.
Preferably, described antenna body is the meander-like antenna master that dual-layer atenna main body is formed by fixedly connecting by metallization via
Body, and the size of antenna body is 15 × 30 × 2mm.
Preferably, described flat board compensates distributed interdigital capacitor is that the slab construction pitching class, sawtooth or hairpin compensates distributed
Interdigital capacitor.
Compared with prior art, the beneficial effects of the utility model are: this utility model, by conventional planar inverse-F antenna
(PIFA) short circuit of antenna body is located in the increase flat board distributed interdigital capacitor of compensation, then realizes the input to antenna body
The effect of adjusting of the imaginary part of impedance, compensates the emotional resistance of PIFA and realizes good impedance matching, and then make sky
While the return loss of line main body has obtained very big improvement, it is achieved that can realize preferably returning without the extra lamped element that increases
The design of antenna of ripple loss, by using first antenna end minor matters and the second antenna end minor matters at antenna body end
Double minor matters structures improve the bandwidth of operation of antenna body, and then the bandwidth of operation that improve antenna body reduces antenna body
Development cost and the noise that brings of lump components and parts.
Accompanying drawing explanation
Fig. 1 is the structural representation of tradition 433MHz planar inverted-F antenna；
Fig. 2 is the structural representation of the 433MHz planar inverted-F antenna without lamped element coupling in this utility model；
Fig. 3 is the miniaturization implementing circuit illustraton of model that this utility model applies in Practical Project；
Fig. 4 is that the echo of the specific embodiment shown in Fig. 3 damages frequency response curve result figure；
In figure: FR44 medium substrate (1), antenna body (2), first antenna end minor matters (21), the second antenna end
It is defeated that end minor matters (22), short circuit ground (3), flat board compensate distributed interdigital capacitor (30), match circuit (4), antenna
Enter end (5), button (6).
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Fig. 1-4, a kind of technical scheme of this utility model offer: a kind of 433MHz planar inverted without lamped element coupling are provided
F antenna, including FR44 medium substrate 1, the size of FR44 medium substrate 1 is 48 × 30 × 2mm, FR44 medium substrate 1
Plane earth on antenna body 2, short circuit ground 3 and button 6 are installed, antenna body 2 passes through metal for dual-layer atenna main body
Change the meander-like antenna main body that via is formed by fixedly connecting, and the size of antenna body 2 is 15 × 30 × 2mm, antenna body
One end thread of 2 connects first antenna end minor matters 21, and first antenna end minor matters 21 thread connects the second antenna end
End minor matters 22, first antenna end minor matters 21 and the second antenna end minor matters 22 are each attached to the one of FR44 medium substrate 1
End, the double minor matters structure of antenna end improves the bandwidth of operation of antenna body 2.
Short circuit ground 3 is positioned at the side of FR44 medium substrate 1, and short circuit ground 3 is provided with the flat board electrically connected with short circuit ground 3
Compensating distributed interdigital capacitor 30, flat board compensates distributed interdigital capacitor 30 and is fixed on FR44 Jie near 3 sides, short circuit ground
On matter substrate 1, flat board compensates distributed interdigital capacitor 30 and improves the capacitive component of input impedance, compensates antenna body 2PIFA
Inductive component realize good impedance matching, flat board compensates distributed interdigital capacitor 30 and puts down for fork class, sawtooth or hairpin
Plate structure compensates distributed interdigital capacitor, and short circuit ground 3 is connected with the other end thread of antenna body 2, and short-circuit 3 and sky
Connecting between line main body 2 has match circuit 4, match circuit 4 to be provided with antenna input 5, and match circuit 4 is laid on
In the trough of FR44 medium substrate 1.
Button 6 is positioned at the middle part of FR44 medium substrate 1, and button 6 is connected with antenna input 5.
The architecture basics of short circuit ground 3 (the Short Pin) of the PIFA of traditional 433MHz adds flat board and compensates distribution
Formula interdigital capacitor 30, realizes the compensation to the emotional resistance value of PIFA by changing its physical dimension, and then achieve need not
The coupling of preferable input impedance can be realized at loading lamped element, and then the return loss of antenna body 2 is obtained
While greatly improving, it is achieved that increase, without extra, the design that lamped element can realize the antenna of preferable return loss, lead to
Cross and use double minor matters structures of first antenna end minor matters 21 and the second antenna end minor matters 22 to improve at antenna body 2 end
The bandwidth of operation of antenna body 2, FR44 medium substrate 1, it is designed and sized to 48 × 30 × 2mm, antenna body 2 size
At 15 × 30 × 2mm, antenna body 2 uses meander line to realize PIFA structure, and upper lower metal layer is connected by metallization via,
And then the bandwidth of operation that improve antenna body 2 reduces the development cost of antenna body 2 and lump components and parts bring makes an uproar
Sound.
Embodiment the most of the present utility model is for the ordinary skill in the art, permissible
Understand these embodiments can be carried out in the case of without departing from principle of the present utility model and spirit multiple change, amendment,
Replacing and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. without the 433MHz planar inverted-F antenna of lamped element coupling, including FR44 medium substrate (1), described FR44
Antenna body (2), short circuit ground (3) and button (6) are installed on the plane earth of medium substrate (1), it is characterised in that:
One end thread of described antenna body (2) connects first antenna end minor matters (21), described first antenna end minor matters
(21) thread connects the second antenna end minor matters (22), described first antenna end minor matters (21) and the second antenna end
End minor matters (22) is each attached to one end of FR44 medium substrate (1), and the double minor matters structure of antenna end improves antenna body
(2) bandwidth of operation；
Described short circuit ground (3) is positioned at the side of FR44 medium substrate (1), and described short circuit ground (3) is provided with and short circuit
The flat board that ground (3) electrically connects compensates distributed interdigital capacitor (30), and described flat board compensates distributed interdigital capacitor (30)
Being fixed on the FR44 medium substrate (1) of (3) side, short-circuit ground, flat board compensates distributed interdigital capacitor (30)
Improving the capacitive component of input impedance, the inductive component compensating antenna body (2) PIFA realizes good impedance matching, institute
(3) are connected with the other end thread of antenna body (2) with stating short circuit, and between short circuit ground (3) and antenna body (2)
Connect and have match circuit (4), described match circuit (4) to be provided with antenna input (5), and match circuit (4) paving
It is located in the trough of FR44 medium substrate (1)；
Described button (6) is positioned at the middle part of FR44 medium substrate (1), and button (6) is with antenna input (5) even
Connect.
433MHz planar inverted-F antenna without lamped element coupling the most according to claim 1, it is characterised in that: institute
The size stating FR44 medium substrate (1) is 48 × 30 × 2mm.
433MHz planar inverted-F antenna without lamped element coupling the most according to claim 1, it is characterised in that: institute
Stating antenna body (2) is the meander-like antenna main body that dual-layer atenna main body is formed by fixedly connecting by metallization via, and sky
The size of line main body (2) is 15 × 30 × 2mm.
433MHz planar inverted-F antenna without lamped element coupling the most according to claim 1, it is characterised in that: institute
State flat board and compensate the slab construction distributed interdigital capacitor of compensation that distributed interdigital capacitor (30) is fork class, sawtooth or hairpin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620437272.2U CN205752530U (en) | 2016-05-13 | 2016-05-13 | 433MHz planar inverted-F antenna without lamped element coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620437272.2U CN205752530U (en) | 2016-05-13 | 2016-05-13 | 433MHz planar inverted-F antenna without lamped element coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205752530U true CN205752530U (en) | 2016-11-30 |
Family
ID=57365775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620437272.2U Active CN205752530U (en) | 2016-05-13 | 2016-05-13 | 433MHz planar inverted-F antenna without lamped element coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205752530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870618A (en) * | 2016-05-13 | 2016-08-17 | 电子科技大学 | 433 MHz planar inverted-F antenna without matching of lumped element |
-
2016
- 2016-05-13 CN CN201620437272.2U patent/CN205752530U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870618A (en) * | 2016-05-13 | 2016-08-17 | 电子科技大学 | 433 MHz planar inverted-F antenna without matching of lumped element |
| CN105870618B (en) * | 2016-05-13 | 2019-04-12 | 电子科技大学 | A kind of matched 433MHz planar inverted-F antenna of no lamped element |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |