CN204857927U - A antenna and microwave heating equipment for microwave heating - Google Patents
A antenna and microwave heating equipment for microwave heating Download PDFInfo
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- CN204857927U CN204857927U CN201520587239.3U CN201520587239U CN204857927U CN 204857927 U CN204857927 U CN 204857927U CN 201520587239 U CN201520587239 U CN 201520587239U CN 204857927 U CN204857927 U CN 204857927U
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Abstract
The utility model relates to a microwave heating technical field discloses an antenna and microwave heating equipment for microwave heating, and this antenna includes: the transmission antenna mast, the feed -in antenna mast, the first end of this feed -in antenna mast with an end connection of transmission antenna mast, so that the transmission antenna mast with after connecting, the feed -in antenna mast is the L type, the short circuit antenna mast, an end connection of this short circuit antenna mast extremely the transmission antenna mast with the link of feed -in antenna mast, and the grounded antenna pole, an end connection of this grounded antenna pole is extremely the second end of short circuit antenna mast, the second end ground connection of this grounded antenna pole. The utility model discloses a microwave that neotype antenna made the microwave source produce transmits by on the food that heats high -efficiently, need not use any extra impedance matching circuit just can realize with the impedance match of microwave source, simple structure, easily the matching is debugged.
Description
Technical field
The utility model relates to microwave heating technique, particularly, relates to a kind of antenna for microwave heating and microwave heating equipment.
Background technology
Semiconductor microwave heating technique is mainly divided into microwave source technology, feed-in technology, control technology three parts, and these three parts all have decisive meaning to the performance of microwave heating food.In recent years, the constantly progress of semiconductor microwave heating technique, but, the feed-in technology that current semiconductor microwave heater adopts is also varied, the most frequently used is probe antenna, and this antenna structure is simple, but regulates very difficult, and it is when adopting multiple probe antenna feed-in at the same time, more difficult to the adjustment of the isolation between each antenna.
Utility model content
The purpose of this utility model is to provide a kind of antenna for microwave heating and microwave heating equipment, comes for microwave heating to provide a kind of antenna being convenient to regulate.
To achieve these goals, the utility model provides a kind of antenna for microwave heating, and this antenna comprises: transmit antenna bar; Feed antenna bar, the first end of this feed antenna bar is connected with the first end of described transmit antenna bar, in L-type after being connected with described feed antenna bar to make described transmit antenna bar; Short circuit mast, the first end of this short circuit mast is connected to the link of described transmit antenna bar and described feed antenna bar; And grounded antenna bar, the first end of this grounded antenna bar is connected to the second end of described short circuit mast, the second end ground connection of this grounded antenna bar.
Preferably, the length of described short circuit mast is zero, thus described antenna passes through the described link ground connection of described transmit antenna bar and described feed antenna bar.
Preferably, the length of described transmit antenna bar and the length sum of described grounded antenna bar are 1/4 operation wavelength.
Preferably, described antenna is directly connected with microwave source, and the second end of wherein said feed antenna bar is connected with the output point of described microwave source.
Preferably, described antenna is connected with microwave source indirectly by radio frequency connector.
Preferably, ground plate is provided with between described antenna and described radio frequency connector, the first surface of this ground plate is connected with the outer conductor of described radio frequency connector, the second surface of this ground plate is connected with the second end of described grounded antenna bar, and the second end of described feed antenna bar is connected with the inner wire of described radio frequency connector.
Preferably, described antenna is connected with described microwave source by two radio frequency connectors of pairing.
Preferably, described two radio frequency connectors are connected by any one mode in following connected mode: welded type connects, push-in type connects, buckle-type connects, plug-in type connects, screw-type connects or use cable to connect.
Preferably, described antenna in the following manner in any one mode insert microwave heating cavity: directly insert or inserted by wave guide box.
Correspondingly, the utility model additionally provides a kind of microwave heating equipment, comprising: one or more antenna for microwave heating described above.
Pass through technique scheme, the utility model is delivered to by the food that heats by the microwave that a kind of novel antenna makes microwave source produce efficiently, do not need to use any extra impedance matching circuit just can realize the impedance matching with microwave source, structure is simple, is easy to matching and debugging.
Other features and advantages of the utility model are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is the configuration diagram of the antenna for microwave heating that the utility model provides;
Fig. 2 is the configuration diagram that microwave source that the utility model provides directly is connected with antenna;
Fig. 3 (a) and Fig. 3 (b) are the configuration diagram of the different angles that antenna that the utility model provides is connected with radio frequency connector;
Fig. 4 is the configuration diagram that another antenna that the utility model provides is connected with radio frequency connector;
Fig. 5 is the configuration diagram that microwave source that the utility model provides is connected indirectly with antenna;
Fig. 6 (a) and Fig. 6 (b) are that antenna that the utility model provides inserts the different mode of two kinds of microwave heating cavity.
Description of reference numerals
100 antenna 101 transmit antenna bars
102 feed antenna bar 103 short circuit masts
104 grounded antenna bar 105 ground planes
200 microwave source 300 radio frequency connectors
301 ground plate 302 outer conductors
303 inner wire 400 microwave heating cavitys
500 wave guide boxes
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
Fig. 1 is the configuration diagram of the antenna for microwave heating that the utility model provides, and as shown in Figure 1, this antenna 100 comprises transmit antenna bar 101, feed antenna bar 102, short circuit mast 103 and grounded antenna bar 104.Wherein, the first end of feed antenna bar 102 is connected with the first end of transmit antenna bar 101, in L-type after being connected with feed antenna bar 102 to make transmit antenna bar 101, the first end of short circuit mast 103 is connected to the link of transmit antenna bar 101 and feed antenna bar 102, the first end of grounded antenna bar 104 is connected to the second end of short circuit mast 103, the second end ground connection of this grounded antenna bar 104.
Fig. 1 shows a kind of example of the structure of antenna 100 described above, and for convenience of description, in FIG, if the length of transmit antenna bar 101 is L, the length of short circuit mast 103 is S, and the length of grounded antenna bar is H.The left part (i.e. the first end of transmit antenna bar 101) of the upper end (namely feeding out the first end of mast 102) and transmit antenna bar 101 that feed out mast 102 is connected, as can be seen from Figure 1, transmit antenna bar 101 is L-type after being connected with feed antenna bar 102.The right part (i.e. the first end of short circuit mast 103) of short circuit mast 103 is connected to the link of transmit antenna bar 101 and feed antenna bar 102, as shown in Figure 1, the right part of short circuit mast 103 is connected to the left part of transmit antenna bar 101 and the upper end of feed antenna bar 102.The upper end (i.e. the first end of grounded antenna bar 104) of grounded antenna bar 104 is connected to the left part (i.e. the second end of short circuit mast 103) of short circuit mast 103, and the bottom (i.e. the second end of grounded antenna bar 104) of grounded antenna bar 104 is connected with ground plane (i.e. ground connection).Wherein, the second end (bottom of the feed antenna bar 102 namely shown in Fig. 1) of feed antenna bar 102 is load point.
In other words, the antenna 100 shown in Fig. 1 is formed by short circuit mast 103 parallel connection of length to be the transmit antenna bar 101 of the open-end of L and length the be terminal short circuit of S, and wherein, this short circuit mast 103 is grounded antenna bar 104 ground connection of H by length.
In the antenna 100 shown in Fig. 1, open end (referring to the right part of transmit antenna bar 101) equivalence can become the parallel connection (opening a way during resonance) of resistance and electric capacity to load point, short-circuit end (referring to the left part of short circuit mast 103) equivalence can become the series connection (during resonance short circuit) of resistance and inductance to load point, when antenna 100 resonance, electric current is mainly distributed in horizontal component (i.e. transmit antenna bar 101 and short circuit mast 103) and the shorted to earth part (i.e. grounded antenna bar 104) of antenna 100, the basic no current distribution of feed leg (i.e. feed antenna bar 102).
Wherein, the value of the length H of the length L of transmit antenna bar 101, the length S of short circuit mast 103 and grounded antenna bar 104 determines the performance such as input impedance, resonance frequency, the beamwidth of antenna of antenna 100.The high efficiency that the input impedance needs of antenna 100 and the impedance matching guarantee of microwave source transmit, and the input impedance of antenna 100 is also the parameter needing emphasis to optimize in experimental debugging, in actual applications, need the resonance frequency regulating antenna 100 by demand, to make antenna 100 energy resonance in all frequencies needed.At present, the microwave frequency band mainly adopted when microwave heating is 2.4GHz to 2.5GHz, so antenna 100 is exactly need to be operated in the bandwidth of this 100MHz.
The impact of length L on the resonance frequency of antenna 100 and input impedance of transmit antenna bar 101 is the most direct.When L increases, the resonance frequency of antenna 100 reduces, and input impedance reduces, and antenna 100 is in perception; Otherwise when L reduces, the resonance frequency of antenna 100 raises, and input impedance becomes large, and antenna 100 is in capacitive.When designing, usually the value sum of the length H of the length L of transmit antenna bar 101 and grounded antenna bar 104 is designed to 1/4 operation wavelength.
The value of H and S affects more complicated to antenna performance, and be specially, when H increases, the resonance frequency of antenna 100 can decrease, and the resistive component of input impedance can increase thereupon, and reaction component also can increase thereupon, and now reaction component presents inductive nature gradually.When H reduces, the resonance frequency of antenna 100 can increase, and the resistive component of input impedance can reduce thereupon, and reaction component also can reduce thereupon, and now reaction component presents capacitive properties gradually.When S increases, the resonance frequency of antenna 100 can increase, and the resistive component of input impedance can reduce thereupon, and reaction component also can reduce thereupon, and now reaction component presents capacitive properties gradually.When S reduces, the resonance frequency of antenna 100 can decrease, and the resistive component of input impedance can increase thereupon, and reaction component also can increase thereupon, and now reaction component presents inductive nature gradually.
As seen through the above analysis, the value of H, S, L tri-parameters of the antenna 100 that can be provided by adjustment the utility model, can make antenna 100 resonance in arbitrary frequency, and the input impedance of antenna 100 closely 50 Ω (generally, microwave source does matched design by 50 Ω) can be made.The antenna 100 that the utility model provides does not need to use any extra impedance matching circuit, and just can realize the impedance matching with microwave source, the design for antenna 100 provides great freedom.
As seen through the above analysis, those skilled in the art can regulate the value of L, S, H according to actual conditions, certainly, in case of need, the length S of short circuit mast 103 can be zero, in this case, antenna 100 can pass through the link ground connection of transmit antenna bar 101 and feed antenna bar 102.
Fig. 2 is the configuration diagram that microwave source that the utility model provides directly is connected with antenna, and as shown in Figure 2, the antenna 100 that the utility model provides directly can be connected with microwave source 200, this microwave source 200 for generation of and amplify microwave.When microwave source 200 is directly connected with antenna 100, the second end (i.e. load point) of the feed antenna bar of antenna 100 is connected with microwave source 200 output point, now the grounded antenna bar 104 of antenna 100 the second end (i.e. the earth terminal of grounded antenna bar 104) can with the earth terminal of microwave source 200 altogether.The mode cost that microwave source and antenna are directly connected is minimum, relates to parts minimum.
Different from the mode that the microwave source shown in Fig. 2 and antenna are directly connected, microwave source can also be connected by radio frequency connector indirectly with antenna, Fig. 3 (a) and Fig. 3 (b) are the configuration diagram of the different angles that antenna that the utility model provides is connected with radio frequency connector, need when antenna 100 is connected with microwave source by radio frequency connector 300 to arrange a ground plate 301 between antenna 100 and radio frequency connector 300, the first surface of this ground plate 301 is connected with the outer conductor 302 of radio frequency connector 300, the second surface of this ground plate 301 is connected with the second end of grounded antenna bar 104, the second end of feed antenna bar 102 is connected with the inner wire 303 of radio frequency connector 300.
Fig. 4 is the configuration diagram that another antenna that the utility model provides is connected with radio frequency connector, as shown in Figure 4, when the length S of the short circuit mast 103 of the antenna 100 shown in Fig. 1 is zero, antenna 100 passes through the link ground connection of transmit antenna bar 101 and feed antenna bar 102.
Composition graphs 1, it will be appreciated by those skilled in the art that feed antenna bar 102 and ground plate 301 are without being connected.
Fig. 5 is the configuration diagram that microwave source that the utility model provides is connected indirectly with antenna, and as shown in Figure 5, antenna 100 is connected with microwave source 200 by two radio frequency connectors 300 of pairing.
The radio frequency connector 300 adopted in the utility model is device conventional in prior art, radio frequency connector 300 and the connection of microwave source 200 are also connected mode conventional in prior art, specifically, the output of microwave source 200 is connected with radio frequency connector 300, in the structure that the microwave source shown in Fig. 5 and antenna are connected indirectly, by two radio frequency connectors 300 of pairing, microwave source 200 can be connected with antenna 100, these two radio frequency connector 300 model pairings, if one is cloudy head, then another is positive head.Wherein two radio frequency connectors 300 can be connected by any one mode in following connected mode: welded type connects, push-in type connects, buckle-type connects, plug-in type connects, screw-type connects or use cable connection etc.
Fig. 6 (a) and Fig. 6 (b) are that antenna that the utility model provides inserts the different mode of two kinds of microwave heating cavity.Shown in Fig. 6 (a) is the mode that antenna 100 directly inserts microwave heating cavity 400, in this manner, by ground plate 301 described above, radio frequency connector 300 and microwave source 200 microwave heating cavity 400 can be connected to, microwave heating cavity 400 can be directly inserted to make antenna 100.
Shown in Fig. 6 (b) is that antenna 100 inserts the mode of microwave heating cavity 400 by wave guide box 500, in this manner, by ground plate 301 described above, radio frequency connector 300 and microwave source 200 can be connected to wave guide box 500, this mode is applicable to need wave guide box 500 to carry out the electromagnetic situation in coupling microwaves source 200.
Situation shown in Fig. 6 (a) with Fig. 6 (b) is all situations that microwave source 200 is connected indirectly with antenna 100, those skilled in the art are to be understood that, also the mode that the antenna 100 shown in Fig. 2 is directly connected with microwave source 200 can be adopted, when antenna 100 is directly connected with microwave source 200, microwave source 200 directly can be connected with microwave heating cavity 400, can directly insert microwave heating cavity 400 to make antenna 100.
Correspondingly, the utility model additionally provides a kind of microwave heating equipment, this equipment comprises one or more antenna 100 for microwave heating described above, in Fig. 6 (a) and Fig. 6 (b), all illustrate the situation that this microwave heating equipment comprises three antennas 100 for microwave heating described above, certainly, the utility model is not limited thereto, and the quantity of concrete adopted antenna 100 can be determined according to actual conditions.
Below preferred implementation of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection range of the present utility model.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different execution mode of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. for an antenna for microwave heating, it is characterized in that, this antenna comprises:
Transmit antenna bar;
Feed antenna bar, the first end of this feed antenna bar is connected with the first end of described transmit antenna bar, in L-type after being connected with described feed antenna bar to make described transmit antenna bar;
Short circuit mast, the first end of this short circuit mast is connected to the link of described transmit antenna bar and described feed antenna bar; And
Grounded antenna bar, the first end of this grounded antenna bar is connected to the second end of described short circuit mast, the second end ground connection of this grounded antenna bar.
2. antenna according to claim 1, is characterized in that, the length of described short circuit mast is zero, thus described antenna passes through the described link ground connection of described transmit antenna bar and described feed antenna bar.
3. antenna according to claim 1 and 2, is characterized in that, the length of described transmit antenna bar and the length sum of described grounded antenna bar are 1/4 operation wavelength.
4. antenna according to claim 1 and 2, is characterized in that, described antenna is directly connected with microwave source, and the second end of wherein said feed antenna bar is connected with the output point of described microwave source.
5. antenna according to claim 1 and 2, is characterized in that, described antenna is connected with microwave source indirectly by radio frequency connector.
6. antenna according to claim 5, it is characterized in that, ground plate is provided with between described antenna and described radio frequency connector, the first surface of this ground plate is connected with the outer conductor of described radio frequency connector, the second surface of this ground plate is connected with the second end of described grounded antenna bar, and the second end of described feed antenna bar is connected with the inner wire of described radio frequency connector.
7. antenna according to claim 5, is characterized in that, described antenna is connected with described microwave source by two radio frequency connectors of pairing.
8. antenna according to claim 7, it is characterized in that, described two radio frequency connectors are connected by any one mode in following connected mode: welded type connects, push-in type connects, buckle-type connects, plug-in type connects, screw-type connects or use cable to connect.
9. antenna according to claim 5, is characterized in that, described antenna in the following manner in any one mode insert microwave heating cavity: directly insert or inserted by wave guide box.
10. a microwave heating equipment, is characterized in that, comprising:
The antenna for microwave heating any one of one or more claim 1-9 described in claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520587239.3U CN204857927U (en) | 2015-08-06 | 2015-08-06 | A antenna and microwave heating equipment for microwave heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520587239.3U CN204857927U (en) | 2015-08-06 | 2015-08-06 | A antenna and microwave heating equipment for microwave heating |
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| Publication Number | Publication Date |
|---|---|
| CN204857927U true CN204857927U (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520587239.3U Active CN204857927U (en) | 2015-08-06 | 2015-08-06 | A antenna and microwave heating equipment for microwave heating |
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| CN (1) | CN204857927U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071017A (en) * | 2015-08-06 | 2015-11-18 | 广东美的厨房电器制造有限公司 | Antenna for microwave heating and microwave heating equipment |
| WO2017020610A1 (en) * | 2015-08-06 | 2017-02-09 | 广东美的厨房电器制造有限公司 | Antenna for microwave heating and microwave heating device |
-
2015
- 2015-08-06 CN CN201520587239.3U patent/CN204857927U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071017A (en) * | 2015-08-06 | 2015-11-18 | 广东美的厨房电器制造有限公司 | Antenna for microwave heating and microwave heating equipment |
| WO2017020610A1 (en) * | 2015-08-06 | 2017-02-09 | 广东美的厨房电器制造有限公司 | Antenna for microwave heating and microwave heating device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |