CN2596567Y - Plane reverse F shape antenna - Google Patents
Plane reverse F shape antenna Download PDFInfo
- Publication number
- CN2596567Y CN2596567Y CN 03202124 CN03202124U CN2596567Y CN 2596567 Y CN2596567 Y CN 2596567Y CN 03202124 CN03202124 CN 03202124 CN 03202124 U CN03202124 U CN 03202124U CN 2596567 Y CN2596567 Y CN 2596567Y
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- radiation conductor
- circular arc
- planar inverted
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- shape antenna
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Abstract
The utility model relates to a planar inverted F-shaped antenna (Planar Inverted-F Antenna; PIFA) which is formed on a base plate. The antenna at least comprises a circular hole and a long and narrow hole, a first radiating conducting wire which surrounds parts of the circular hole in a conformal mode, a second radiating conducting wire which surrounds parts of the long and narrow hole in a conformal mode, and a radiating conducting wire which is in a vertical stripe type and is positioned between the long and narrow hole and the circular hole, wherein one end of the first radiating conducting wire is connected with one end of the radiating conducting wire in a vertical stripe type, one end of the second radiating conducting wire is combined with the adjacently partial outer side edge at the end of the first radiating conducting wire, and the radiating conducting wire in a vertical stripe type and the first radiating conducting wire form an opening. In addition, two planar inverted F-shaped antennas of the utility model are installed on the base plate simultaneously by the arrangement of the antenna diversity.
Description
Technical field
The utility model relates to a kind of planar inverted F-shape antenna (Planar Inverted-F Antenna; PIFA), relate in particular to a kind of lip-deep planar inverted F-shape antenna that is formed at circuit substrate.
Background technology
Fast development along with communication science and technology, mechanics of communication also increases day by day in the application of sci-tech product, make relevant communication product become more diverse, and the consumer is more and more higher to the functional requirement of communication product in recent years, so many communication products with different designs and function are constantly released, have the recent especially popular trend of computer network product of wireless telecommunications, the technology of adding integrated circuit is increasingly mature, makes the volume of product also be inclined to compact gradually.
Be used to transmit antenna, particularly printed antenna or microstrip antenna with received signal in communication product, its design and research more has its importance.Antenna is to be used for radiation or receive electromagnetic a kind of assembly, generally can know antenna characteristics from frequency of operation, radiation pattern (Radiation Pattern), reflection loss (Reflected Loss) and antenna gain parameters such as (Antenna Gain).
Because different communication product, the function that it possessed is neither to the greatest extent identical, so be used for the Antenna Design variation especially of radiation or received signal, for example rhombic aerial (Rhombic Antenna), positive staggered form antenna (Tumstile Antenna), triangular microstrip antennas, inverted F shaped antenna etc.Traditional inverted F shaped antenna structure generally is to place a small pieces sheet metal as radiating principal on ground plane, add that at the edge of radiating principal a short-circuit line is connected with ground plane, can make originally be the antenna length of 1/2nd resonance wavelength, be reduced to the antenna length of 1/4th resonance wavelength, thereby reach the effect of antenna volume downsizing.
Shown in Figure 1A, the planar inverted F-shape antenna of prior art is made up of ground plane 10, radiation metal wires 20, short-circuit line 22 and TEM pipeline 30, wherein an end of short-circuit line 22 vertically is connected to an end of radiation metal wires 20, and the other end of short-circuit line 22 then vertically is connected on the ground plane 10.TEM pipeline 30 is made up of inside conductor 34 and outer conductor assembly 32, and inside conductor 34 vertically is connected to radiation metal wires 20, with this FD feed.In addition, shown in Figure 1B, another prior art planar inverted F-shape antenna replaces radiation metal wires 20 and short-circuit line 22 with radiation sheet metal 40 and short-circuit piece 42.Yet the planar inverted F-shape antenna of prior art is three-dimensional pattern, and its usage space must be occupied the height as short-circuit line 22 or short-circuit piece 42, for the extremely thin product of required thickness, is a great problem in the design in fact.
Therefore, press for very much a kind of modified model planar inverted F-shape antenna of development, antenna requirements such as small size, thin thickness, high-gain, frequency range are big fully to satisfy, simplicity of design, cost are low solves the shortcoming of the planar inverted F-shape antenna of prior art.
Summary of the invention
At above-mentioned the deficiencies in the prior art, main purpose of the present utility model is to provide a kind of planar inverted F-shape antenna, provide with this have extra small thickness, small size and cheap and good-quality antenna, it also has good antenna performances such as frequency range is big, loss is little, radiation pattern is good, and the coupled circuit substrate is made easily, reduce cost required when circuit integrated, increase the product stability, thereby have high industry using value.
Another purpose of the present utility model is to provide a kind of planar inverted F-shape antenna, by the arrangement that antenna switches (Antenna Diversity) according to qualifications, two planar inverted F-shape antennas is installed on substrate simultaneously, obtains better antenna function with this.
According to above-described purpose, the utility model provides a kind of planar inverted F-shape antenna.This planar inverted F-shape antenna comprises at least: substrate, and this substrate has first surface and second surface at least, and first surface and second surface lay respectively at the relative both sides of substrate; The round hole of running through substrate, wherein this circle hole has first radius; The long and narrow hole of running through substrate, wherein this long and narrow hole has first straight flange and second straight flange that is parallel to each other, and the two ends of first straight flange and second straight flange are connected to all outwardly the first circular arc limit and second circular arc limits of mirror (Mirror-Reflected) each other and its convex surface, and the first circular arc limit and the second circular arc limit are made with second radius; First radiation conductor is positioned on the first surface of substrate, and with the round hole of the mode circle segment of conformal (Conformal), wherein first radiation conductor has near the inner side edge in circle hole with from circle hole outer side edges far away; Second radiation conductor is positioned on the first surface of substrate, and with first circular arc limit of conformal mode circle segment and first straight flange of part; And vertical bar radiation conductor, between the first circular arc limit and circle hole, wherein an end in the close long and narrow hole of first radiation conductor is connected in an end of vertical bar radiation conductor, second radiation conductor is incorporated in the outer side edges of the part adjacent with the aforementioned end of first radiation conductor near an end on the first circular arc limit, the vertical bar radiation conductor and first radiation conductor are formed with opening, and second straight flange in long and narrow hole and opening homonymy, first straight flange is positioned at the opposite side of opening.
To achieve these goals, the utility model provides a kind of planar inverted F-shape antenna, wherein, at least comprise: a substrate, have a first surface and a second surface at least, lay respectively at the relative both sides of this substrate, have on this substrate: a circle hole has one first radius and runs through this substrate; An and long and narrow hole, have one first straight flange that is parallel to each other and one second straight flange and run through this substrate, wherein the two ends of this first straight flange and this second straight flange are connected to all outwardly one first circular arc limit and one second circular arc limits of mirror each other and convex surface, and this first circular arc limit and this second circular arc limit are made with one second radius; One first radiation conductor has an inner side edge and an outer side edges and is positioned on this first surface of this substrate, and with this circle hole of conformal mode circle segment; One second radiation conductor is positioned on this first surface of this substrate, and with this first circular arc limit of conformal mode circle segment and this first straight flange of part; An and vertical bar radiation conductor, between this first circular arc limit and this circle hole, wherein an end of this vertical bar radiation conductor is connected in the end near this long and narrow hole of this first radiation conductor simultaneously, and the end near this first circular arc limit of this second radiation conductor, this vertical bar radiation conductor and this first radiation conductor are formed with an opening in the other end of this vertical bar radiation conductor.
Described planar inverted F-shape antenna wherein, comprises several through holes that run through this substrate at least, and wherein this through hole is distributed on this first radiation conductor and this second radiation conductor equably.
Described planar inverted F-shape antenna wherein, has a back gauge between the summit on this second circular arc limit in the other end of this second radiation conductor and this long and narrow hole.
Described planar inverted F-shape antenna wherein, comprises a load point at least, is positioned on this other end of this vertical bar radiation conductor.
Described planar inverted F-shape antenna, wherein, it comprises a ground plane at least, be positioned at this first radiation conductor under this second surface of this substrate on.
Described planar inverted F-shape antenna, wherein, this of this long and narrow hole first circular arc limit and this second circular arc limit are two semi arches.
Described planar inverted F-shape antenna, wherein, this second radiation conductor is near half around this first circular arc limit in this long and narrow hole of the part on this first circular arc limit.
Described planar inverted F-shape antenna, wherein, the end near this long and narrow hole that is shaped as from this first radiation conductor of this inner side edge of this first radiation conductor begins, and angle is about the circular arc greater than 180 degree.
Described planar inverted F-shape antenna, wherein, this first radiation conductor, this second radiation conductor and this vertical bar radiation conductor are made by metal wire.
Described planar inverted F-shape antenna, wherein, this substrate is made by glass (FR4) material.
Brief Description Of Drawings
Below in conjunction with accompanying drawing,, will make the technical solution of the utility model and other beneficial effects apparent by detailed description to preferred embodiment of the present utility model.
In the accompanying drawing,
Figure 1A and Figure 1B are respectively the schematic perspective views of two kinds of planar inverted F-shape antennas of prior art;
Fig. 2 is the schematic perspective view of the planar inverted F-shape antenna of a preferred embodiment of the present utility model;
Fig. 3 is the schematic top plan view of the planar inverted F-shape antenna of preferred embodiment of the present utility model;
Fig. 4 is the measurement data figure of the planar inverted F-shape antenna of preferred embodiment of the present utility model about standing-wave ratio;
Fig. 5 A is preferred embodiment of the present utility model when operating in 2.450GHz, the experimental data figure of the radiation pattern on y-z plane;
Fig. 5 B is preferred embodiment of the present utility model when operating in 2.450GHz, the experimental data figure of the radiation pattern on x-z plane; And
Fig. 6 A, Fig. 6 B and Fig. 6 C are that the planar inverted F-shape antenna of preferred embodiment of the present utility model switches the schematic diagram of arranging.
Embodiment
Hereinafter, will describe the utility model in detail.
Planar inverted F-shape antenna of the present utility model is completed on substrate, do not account for the space above or below the substrate, so can overcome the shortcoming of the planar inverted F-shape antenna of prior art, thereby satisfy the needs of communication product effectively, particularly for having the product of extra small thickness.
As shown in Figure 2, planar inverted F-shape antenna 100 is formed at the upper surface of substrate 170, and planar inverted F-shape antenna 100 comprises at least: circle hole 115, long and narrow hole 125, radiation conductor 110, radiation conductor 120 and vertical bar radiation conductor 130, wherein the end that is not connected with radiation conductor 110 of vertical bar radiation conductor 130 has load point 150.Also can be formed with on radiation conductor 110, the radiation conductor 120 and run through substrate 170 and equally distributed several through holes 145, and in case of necessity, but through hole 145 also adequate relief be formed on the vertical bar radiation conductor 130.What deserves to be mentioned is that these circle holes 115, long and narrow hole 125 and through hole 145 can increase antenna bandwidth effectively and improve antenna gain.In addition, substrate 170 can be by for example by the glass made printed circuit board (PCB)s of material such as (FR4), and be formed at the lower surface of substrate 170 by the made ground plane 177 of electric conducting material, and can be positioned at radiation conductor 110 and part vertical bar radiation conductor 130 (as half of vertical bar radiation conductor 130) under, yet, the position of ground plane 177 of the present utility model can be different according to actual needs, so the utility model is not limited in this.
As shown in Figure 3, substrate 170 is run through in circle hole 115 and long and narrow hole 125, and circle hole 115 is made with radius R 1, and long and narrow hole 125 has straight flange 122a and the straight flange 122b that is parallel to each other, and the two ends of straight flange 122a and straight flange 122b are connected to the circular arc limit 124a and the circular arc limit 124b of mirror each other, wherein the convex surface of circular arc limit 124a and circular arc limit 124b and is made with radius R 2 all outwardly, for example semi arch.And radiation conductor 110 is with the round hole 115 of conformal mode circle segment, and have near the inner side edge 112 in circle hole 115 and from the circle hole 115 outer side edges 113 far away.Radiation conductor 110 and vertical bar radiation conductor 130 are formed with opening 118, the straight flange 122b in wherein long and narrow hole 125 and opening 118 homonymies, and its straight flange 122a is positioned at the opposite side of opening 118.The shape of the inner side edge 112 of radiation conductor 110 can be from its end (shown in dotted line 136) beginning near long and narrow hole 125, and angle is about the circular arc greater than 180 degree (for example being 247.5 degree).
Please continue with reference to Fig. 3, radiation conductor 120 is with the circular arc limit 124b of conformal mode circle segment and the straight flange 122a of part.Vertical bar radiation conductor 130 is between circular arc limit 124b and circle hole 115, wherein an end in the close long and narrow hole 125 of radiation conductor 110 (shown in dotted line 136) is connected in an end of vertical bar radiation conductor 130, and radiation conductor 120 is incorporated in the outer side edges 113 (shown in dotted line 116) of the part adjacent with the aforementioned end of radiation conductor 110 near the end of circular arc limit 124b.And having a back gauge L2 between the summit of the circular arc limit 124a in the other end of radiation conductor 120 and long and narrow hole 125, the size of this back gauge L2 is decided according to the material of substrate 170 and radiation conductor.
In addition, in the present embodiment, antenna total length L 1 can be for example about 26.1mm; Radius R 1 can equal radius R 2, for example is about 2mm; The width of radiation conductor 110, radiation conductor 120 and vertical bar radiation conductor 130 can be identical value, for example is that about 0.3mm is to about 1mm.Yet above-described radian, radius, length, width and material etc. are only for illustrating, and the utility model is not limited in this.
Planar inverted F-shape antenna of the present utility model learns that planar inverted F-shape antenna of the present utility model has quite good antenna performance after actual measurement.As shown in Figure 4, wherein when antenna operated in the about 2.4GHz of frequency (operating point B1), standing-wave ratio was about 1: 1.3172, and when antenna operated in frequency for about 2.45GHz (operating point B2), standing-wave ratio was about 1: 1.3; When antenna operated in the about 2.5GHz of frequency (operating point B3), standing-wave ratio was about 1: 1.1102; When antenna operated in the about 2.52GHz of frequency (operating point B4), standing-wave ratio was about 1: 1.0341.If when equaling about 1: 1.8 straight line L and be benchmark with standing-wave ratio, the frequency of operating point A is about 2.22GHz, the frequency of operating point C is about 2.67GHz, so when planar inverted F-shape antenna of the present utility model operates in the about 2.45GHz of frequency, its operation frequency range can be about 450MHz, and this operation frequency range can satisfy the demand in the design effectively.
Fig. 5 A is the planar inverted F-shape antenna of preferred embodiment of the present utility model when operating in 2.45GHz, the experimental data figure of the radiation pattern on y-z plane; Fig. 5 B is preferred embodiment of the present utility model when operating in 2.45GHz, the experimental data figure of the radiation pattern on x-z plane.Can learn that from Fig. 5 B the radiation pattern on the x-z plane of an embodiment of the present utility model presents the circular radiation pattern of omni-directional (Omni-directional) antenna.And the radiation pattern on the y-z plane shown in Fig. 5 A is also quite good.
In addition, planar inverted F-shape antenna of the present utility model can obtain better antenna function by the antenna arrangement of switching according to qualifications.Shown in Fig. 6 A, Fig. 6 B and Fig. 6 C, wherein planar inverted F-shape antenna 100 and planar inverted F-shape antenna 200 are formed on the substrate 170 simultaneously, and planar inverted F-shape antenna 100 can be identical with the shape and the size of planar inverted F-shape antenna 200, and are parallel to each other.As previously mentioned, similarly, planar inverted F-shape antenna 200 comprises at least: circle hole 215, long and narrow hole 225, radiation conductor 210, radiation conductor 220 and vertical bar radiation conductor 230, wherein the end that is not connected with radiation conductor 210 of vertical bar radiation conductor 230 has load point 250, runs through substrate 170 and equally distributed several through holes 245 and can be formed with on radiation conductor 210 and the radiation conductor 220.In planar inverted F-shape antenna 100, vertical bar radiation conductor 130 and radiation conductor 110 are formed with opening 118; And in planar inverted F-shape antenna 200, vertical bar radiation conductor 230 and radiation conductor 210 are formed with opening 218.Shown in 6A figure, the direction of opening 118 can with opening 218 in the same way; Shown in 6B figure, the direction of opening 118 can be relative with opening 218; Shown in 6C figure, the direction of opening 118 can be opposite with opening 218.Use the purpose of two plane inverted F shaped antennas to be, when the transmitting-receiving of a plane inverted F shaped antenna wherein was bad, another plane inverted F shaped antenna can replace and carry out signal transmitting and receiving.Simultaneously, by the different arrangement of aforesaid opening direction, can further improve the antenna performance as radiation pattern etc. of planar inverted F-shape antenna of the present utility model.
Advantage of the present utility model is to provide a kind of planar inverted F-shape antenna, thickness of the present utility model is extra small, posture is low, and have good antenna performances such as frequency range is big, loss is little, radiation pattern is good, and the coupled circuit substrate is made easily, so can reduce cost required when circuit integrated, increase the product stability, thereby have high industry using value.
Another advantage of the present utility model is to provide a kind of planar inverted F-shape antenna, the arrangement that can utilize antenna to switch according to qualifications, and obtain better antenna function.
Be understandable that; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to the technical solution of the utility model and technical conceive, and all these changes and distortion all should belong to the protection range of the utility model accompanying Claim.
Claims (10)
1, a kind of planar inverted F-shape antenna is characterized in that, comprises at least:
One substrate has a first surface and a second surface at least, lays respectively at the relative both sides of this substrate, has on this substrate:
One circle hole has one first radius and runs through this substrate; And
One long and narrow hole, have one first straight flange that is parallel to each other and one second straight flange and run through this substrate, wherein the two ends of this first straight flange and this second straight flange are connected to all outwardly one first circular arc limit and one second circular arc limits of mirror each other and convex surface, and this first circular arc limit and this second circular arc limit are made with one second radius;
One first radiation conductor has an inner side edge and an outer side edges and is positioned on this first surface of this substrate, and with this circle hole of conformal mode circle segment;
One second radiation conductor is positioned on this first surface of this substrate, and with this first circular arc limit of conformal mode circle segment and this first straight flange of part; And
One vertical bar radiation conductor, between this first circular arc limit and this circle hole, wherein an end of this vertical bar radiation conductor is connected in the end near this long and narrow hole of this first radiation conductor simultaneously, and the end near this first circular arc limit of this second radiation conductor, this vertical bar radiation conductor and this first radiation conductor are formed with an opening in the other end of this vertical bar radiation conductor.
2, planar inverted F-shape antenna according to claim 1 is characterized in that, also comprises several through holes that run through this substrate at least, and wherein this through hole is distributed on this first radiation conductor and this second radiation conductor equably.
3, planar inverted F-shape antenna according to claim 1 is characterized in that, has a back gauge between the summit on this second circular arc limit in the other end of this second radiation conductor and this long and narrow hole.
4, planar inverted F-shape antenna according to claim 1 is characterized in that, also comprises a load point at least, is positioned on this other end of this vertical bar radiation conductor.
5, planar inverted F-shape antenna according to claim 1 is characterized in that, also comprises a ground plane at least, be positioned at this first radiation conductor under this second surface of this substrate on.
6, planar inverted F-shape antenna according to claim 1 is characterized in that, this of this long and narrow hole first circular arc limit and this second circular arc limit are two semi arches.
7, planar inverted F-shape antenna according to claim 1 is characterized in that, this second radiation conductor is near half around this first circular arc limit in this long and narrow hole of the part on this first circular arc limit.
8, planar inverted F-shape antenna according to claim 1 is characterized in that, the end near this long and narrow hole that is shaped as from this first radiation conductor of this inner side edge of this first radiation conductor begins, and angle is about the circular arc greater than 180 degree.
9, planar inverted F-shape antenna according to claim 1 is characterized in that, this first radiation conductor, this second radiation conductor and this vertical bar radiation conductor are made by metal wire.
10, planar inverted F-shape antenna according to claim 1 is characterized in that, this substrate is made by glass (FR4) material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03202124 CN2596567Y (en) | 2003-01-03 | 2003-01-03 | Plane reverse F shape antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03202124 CN2596567Y (en) | 2003-01-03 | 2003-01-03 | Plane reverse F shape antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2596567Y true CN2596567Y (en) | 2003-12-31 |
Family
ID=33753465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03202124 Expired - Lifetime CN2596567Y (en) | 2003-01-03 | 2003-01-03 | Plane reverse F shape antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2596567Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192703B (en) * | 2006-12-01 | 2011-04-20 | 智易科技股份有限公司 | Four-ring type oppositely-positioned super small high gain planar antenna |
| CN101093909B (en) * | 2006-06-23 | 2011-09-07 | 智易科技股份有限公司 | Metal inverted F antenna |
| CN101335378B (en) * | 2005-02-02 | 2011-12-14 | 启碁科技股份有限公司 | Multi-frequency antenna and design method thereof |
| CN104425865A (en) * | 2013-09-06 | 2015-03-18 | 智易科技股份有限公司 | Antenna structure suitable for RF (Radio Frequency) cover |
-
2003
- 2003-01-03 CN CN 03202124 patent/CN2596567Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335378B (en) * | 2005-02-02 | 2011-12-14 | 启碁科技股份有限公司 | Multi-frequency antenna and design method thereof |
| CN101093909B (en) * | 2006-06-23 | 2011-09-07 | 智易科技股份有限公司 | Metal inverted F antenna |
| CN101192703B (en) * | 2006-12-01 | 2011-04-20 | 智易科技股份有限公司 | Four-ring type oppositely-positioned super small high gain planar antenna |
| CN104425865A (en) * | 2013-09-06 | 2015-03-18 | 智易科技股份有限公司 | Antenna structure suitable for RF (Radio Frequency) cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130104 Granted publication date: 20031231 |