Planar antenna and microwave oven

Abstract

The utility model provides a planar antenna and a microwave oven, comprising a radiation main body and a terminal, the radiation main body is used for generating directional electromagnetic waves, the radiation main body is provided with a plurality of long edges and a plurality of chamfered edges, the plurality of long edges jointly control antenna frequency and S parameters, and each chamfered edge controls the S parameters of the antenna; the terminal is connected with the radiation main body, and is fed to the radiation main body to form a single-stage planar antenna; according to the planar antenna, fine adjustment and optimization of the antenna frequency and the S parameter are realized through the plurality of long edges and the plurality of chamfered edges arranged on the radiation main body, the design not only improves the integration level and reliability of the antenna, but also enables the antenna to adapt to complex communication environments and various frequency band requirements, and more importantly, the planar antenna is applied to a microwave oven, so that the application range of the planar antenna is widened. The temperature of each point in the microwave oven can be controlled in a differentiated mode, advantage heating of different frequencies and different space points is achieved, and therefore the heating requirements of different food materials and different cooking requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of antenna manufacturing technology in the home appliance industry, specifically to a planar antenna and a microwave oven. Background Technology

[0002] Against the backdrop of rapid development and continuous innovation in wireless communication technology, antennas, as core components of wireless communication equipment, are crucial for improving the communication quality and efficiency of the entire communication system through performance enhancement and optimization. With the continuous advancement of modern communication technology, modern communication equipment places higher demands on antenna performance, such as pursuing higher gain, wider bandwidth coverage, more stable radiation characteristics, and better electromagnetic compatibility. Especially in specific application scenarios such as microwave ovens, antenna performance directly affects the heating effect and the accuracy of internal temperature control.

[0003] Traditional antenna designs, such as helical antennas and parabolic antennas, while meeting the needs of early communication technologies to some extent, face numerous challenges in miniaturization, weight reduction, and integration of modern communication equipment due to their complex three-dimensional structure, high manufacturing costs, and large size. Therefore, planar antennas, with their advantages of simple structure, ease of integration, low manufacturing cost, and good electromagnetic compatibility, have gradually become a research hotspot in the field of wireless communication.

[0004] In planar antenna design, various geometric structures, such as slots, patches, and vibrators, are widely used in the radiating element to optimize antenna performance. Among these, the planar structure has received widespread attention in planar antenna design due to its unique geometry and electromagnetic properties. Planar structures can provide uniform current distribution, which helps to achieve wideband characteristics.

[0005] However, despite the numerous advantages that planar structures have demonstrated in planar antenna design, existing planar antenna designs based on planar structures still face some critical issues that urgently need to be addressed. Some designs control the antenna frequency and S-parameters (i.e., scattering parameters, used to describe the transmission and reflection characteristics between antenna ports) solely through simple planar patches or slots. This approach has limitations in achieving fine-tuning of antenna performance. Especially when facing complex communication environments and multiple frequency band requirements, this simple design approach proves inadequate.

[0006] Furthermore, although some designs employ multiple planar structures, the lack of an effective collaboration mechanism between these structures results in only a limited improvement in overall antenna performance. Moreover, in optimizing antenna S-parameters, existing designs often rely too heavily on adjusting the overall dimensions of the planar structure while neglecting the detailed design of the edges, thus limiting further improvements in antenna performance.

[0007] In the field of microwave heating, traditional microwave ovens typically use a control circuit to continuously generate microwaves via a magnetron, which are then coupled into the cooking cavity through a waveguide system. To distribute the microwave energy evenly within the cooking cavity, a rotating metal fan stirrer is usually included. However, this design has significant shortcomings: when the food inside the microwave oven varies in material, shape, size, or placement, the uncontrollable temperature distribution within each space leads to uneven heating, and may even result in burning. Furthermore, traditional microwave ovens generally employ a single magnetron design, which, while achieving temperature uniformity within the oven, provides a fixed and uncontrollable uniformity, failing to meet the diverse heating requirements of different ingredients and cooking methods.

[0008] The above background information is provided only to assist in understanding the utility model concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application, nor does it necessarily provide technical teaching. In the absence of clear evidence that the above information was disclosed before the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0009] To address the aforementioned technical issues, this invention proposes a planar antenna and a microwave oven. By utilizing multiple long sides and multiple chamfered sides on the radiating body, it achieves precise adjustment and optimization of the antenna frequency and S-parameters. This design not only improves the antenna's integration and reliability but also enables it to adapt to complex communication environments and multiple frequency band requirements. More importantly, applying this planar antenna to a microwave oven allows for differentiated temperature control at various points inside the microwave oven, achieving optimal heating at different frequencies and spatial points. This satisfies the heating requirements of different ingredients and cooking needs, improving the microwave oven's heating effect and the accuracy of internal temperature control.

[0010] To achieve the above objectives, the technical solution of this utility model is as follows:

[0011] This utility model provides a planar antenna, comprising:

[0012] A radiating body is used to generate directional electromagnetic waves. The radiating body is provided with multiple long sides and multiple chamfered sides. The multiple long sides jointly control the antenna frequency and S-parameters, and each chamfered side controls the antenna S-parameters.

[0013] The terminal is connected to the radiating body and is fed to the radiating body to form a single-stage planar antenna.

[0014] This invention proposes a planar antenna and a microwave oven. By using multiple long sides and multiple chamfered sides on the radiating body, it achieves fine adjustment and optimization of the antenna frequency and S-parameters. This design not only improves the antenna's integration and reliability but also enables it to adapt to complex communication environments and multiple frequency band requirements. More importantly, by applying this planar antenna to a microwave oven, it is possible to achieve differentiated temperature control at various points inside the microwave oven, enabling advantageous heating at different frequencies and spatial points. This satisfies the heating requirements of different ingredients and cooking needs, improving the heating effect and the accuracy of internal temperature control in the microwave oven.

[0015] As a preferred technical solution, the long side has at least four parts, wherein:

[0016] The first long side, together with the second long side, the third long side, and a portion of the fourth long side, jointly control the antenna's frequency and S-parameters.

[0017] The second long side, together with the first long side, the third long side, and a portion of the fourth long side, jointly controls the antenna's frequency and S-parameters.

[0018] The third long side, together with the first long side, the second long side, and a portion of the fourth long side, controls the antenna's frequency and S-parameters.

[0019] The fourth long side, together with the first long side, the second long side, and a portion of the third long side, controls the antenna's frequency and S-parameters.

[0020] The chamfered edges are provided at least two, and the chamfered edges are arranged in a corresponding manner.

[0021] As a preferred technical solution, the terminal includes: a radiation body locking and positioning assembly, which includes: a radiation body positioning member and a locking member, one end of the radiation body positioning member passing through the radiation body and being connected to the radiation body through the locking member.

[0022] As a preferred technical solution, the radiation body locking and positioning assembly includes: an anti-slip pad and a support platform. One end face of the radiation body positioning member is externally disposed on the locking member to form a radiation body positioning plane. The anti-slip pad is disposed between one end face of the radiation body and the locking member. The other end of the radiation body positioning member is connected to one end face of the support platform.

[0023] As a preferred technical solution, the terminal includes: a first transition section and an inner conductor rod of the antenna, and the other end face of the support platform is connected to one end of the inner conductor rod of the antenna through the first transition section.

[0024] As a preferred technical solution, the terminal includes: a positioning and fixing component, the positioning and fixing component includes: a fixing stop and a terminal male fastener, the other end of the inner conductor rod of the antenna is connected to one end of the fixing stop, the other end of the fixing stop is connected to one end of the terminal male fastener, the terminal male fastener has a fastener on its outer periphery near one end of the fixing stop, and a terminal male positioning plane is provided on the outer side wall of the terminal male fastener.

[0025] As a preferred technical solution, the terminal includes: a female terminal head limiting post and a first grounding component, the other end of the male terminal head fastener is connected to one end of the female terminal head limiting post, and the other end of the female terminal head limiting post is connected to one end of the first grounding component through a second transition section.

[0026] As a preferred technical solution, the terminal includes: a third transition section, a terminal male retaining ring, a fourth transition section, and a second grounding component. The other end of the first grounding component is connected to one end of the terminal male retaining ring through the third transition section, and the other end of the terminal male retaining ring is connected to the second grounding component through the fourth transition section.

[0027] This utility model also provides a microwave oven, including: a planar antenna as described in any of the above claims, wherein at least two planar antennas are provided, and the planar antennas are installed on the top of the microwave oven body through a radiating body locking and positioning assembly, wherein the planar antennas are coupled to one end face of the microwave oven body to generate a downward radiating electric field, and the beam direction, beam shape and beamwidth are controlled by adjusting the phase difference between the planar antennas.

[0028] As a preferred technical solution, the following are included:

[0029] A phase adjuster is used to adjust the phase difference between planar antennas;

[0030] A temperature probe is used to collect temperature data inside the microwave oven body in real time.

[0031] The controller connects the temperature probe to the phase adjuster. The controller is used to adjust the phase difference between the planar antennas based on the received temperature data inside the microwave oven body, so as to achieve advantageous heating of different frequencies and different spatial points inside the microwave oven body.

[0032] The planar antenna and microwave oven provided by this utility model have the following beneficial effects:

[0033] 1) By setting multiple long sides and multiple chamfered sides on the radiating body, the antenna frequency and S-parameters can be finely adjusted and optimized. This design not only improves the antenna's integration and reliability, but also enables it to adapt to complex communication environments and multiple frequency band requirements. More importantly, when this planar antenna is applied in a microwave oven, it can achieve differentiated control of the temperature at various points inside the microwave oven, and achieve advantageous heating at different frequencies and different spatial points, thereby meeting the heating requirements of different ingredients and different cooking needs, and improving the heating effect and the accuracy of internal temperature control of the microwave oven.

[0034] 2) The design and arrangement of the long sides directly affect the antenna's resonant frequency. By adjusting the design and arrangement of the long sides, the antenna's operating frequency can be precisely adjusted to meet specific frequency band requirements. S-parameters (scattering parameters) are important parameters describing the antenna port characteristics, including the reflection coefficient (S11). The design of the long sides also helps optimize these parameters, reduce signal reflection and loss, and improve the antenna's radiation efficiency. The design of the chamfered sides can further fine-tune the antenna's S-parameters, especially the reflection coefficient, to optimize the antenna's matching characteristics; the chamfered sides can further reduce signal reflection and improve antenna performance.

[0035] Applying this planar antenna to a microwave oven allows for differentiated heating by utilizing the characteristics of its directional electromagnetic waves. Due to the fine adjustment of the antenna frequency and S-parameters, the distribution of electromagnetic waves inside the microwave oven can be more uniform or have a specific directionality, thereby enabling differentiated temperature control at various points inside the microwave oven.

[0036] Different ingredients and cooking needs require different heating methods. By adjusting the frequency and S-parameters of the antenna, the distribution of electromagnetic waves can be optimized to achieve superior heating effects at different frequencies and spatial points. This can meet the heating needs of different ingredients and improve the heating effect and internal temperature control accuracy of the microwave oven.

[0037] The design of this planar antenna not only improves the antenna's integration, making it more compact and easier to install, but also enhances its reliability through fine-tuning and optimization; this is especially important for equipment such as microwave ovens that require long-term stable operation.

[0038] 3) In the design of a planar antenna, there are at least four long sides, and each long side, together with a portion of the other three long sides, controls the antenna's frequency and S-parameters. This design utilizes the principle of multipath interference, that is, when electromagnetic waves propagate along the long sides, reflection and interference occur, thereby affecting the antenna's resonant frequency and S-parameters. By precisely adjusting the size, shape, and arrangement of the long sides, fine adjustment of the antenna's frequency and S-parameters can be achieved. For example, adjusting the shape and arrangement of the long sides can optimize the S-parameters and reduce signal reflection and loss.

[0039] The chamfered edge design further enhances the ability to fine-tune the antenna's S-parameters; the corresponding chamfered edges can further optimize the antenna's matching characteristics, reduce signal reflection, and improve the antenna's radiation efficiency; the chamfered edge design can also be used to adjust the antenna's directivity and polarization characteristics, thereby meeting the requirements of specific communication environments.

[0040] Applying this planar antenna to a microwave oven allows for differentiated heating by utilizing the characteristics of its directional electromagnetic waves. Due to the fine adjustment of the antenna frequency and S-parameters, the distribution of electromagnetic waves inside the microwave oven can be more uniform or have a specific directionality. By adjusting the antenna frequency and S-parameters, the propagation path and intensity distribution of electromagnetic waves inside the microwave oven can be controlled, thereby achieving differentiated temperature control at various points inside the microwave oven.

[0041] Different ingredients and cooking needs require different heating methods. By adjusting the antenna frequency and S-parameters, the distribution of electromagnetic waves can be optimized, giving them superior heating effects at different frequencies and spatial points. For example, for ingredients that need to be heated quickly, a higher antenna frequency and optimized S-parameters can be selected to create a strong hot spot inside the microwave oven. For ingredients that need to be heated evenly, a lower antenna frequency and optimized S-parameters can be selected to create a more uniform heating distribution inside the microwave oven.

[0042] 4) By adjusting the phase difference between the first and second planar antennas, the direction and shape of the beam can be controlled. This technology is called phased array technology. It utilizes the interference and superposition effects of waves to focus the signal in a specific direction, thereby improving the heating effect and reliability of a certain area inside the microwave oven, and thus ensuring uniform heating of different foods inside the microwave oven. The change in phase not only affects the direction of the beam, but also changes the beam width. By adjusting the phase difference between the first and second planar antennas, the beam can be narrowed or widened to adapt to heating foods of different positions and volumes inside the microwave oven.

[0043] The temperature probe is used to collect temperature data inside the microwave oven body in real time. The controller is used to adjust the phase difference between the first planar antenna and the second planar antenna based on the received temperature data. This reduces the heating effect on the high-temperature points of the food and enhances the heating effect on the low-temperature points, thereby achieving uniform heating. In addition, by changing the phase difference between the first and second planar antennas, the heating effect on a certain area of ​​the food is reduced in real time, while the heating effect on another area is enhanced, thereby achieving differentiated temperature control at various points inside the microwave oven. Attached Figure Description

[0044] Figure 1 A schematic diagram of the structure of a planar antenna provided by this utility model;

[0045] Figure 2 Schematic diagrams of a planar antenna from different perspectives provided by this utility model;

[0046] Figure 3 Schematic diagrams of a planar antenna from different perspectives provided by this utility model;

[0047] Figure 4 Schematic diagrams of a planar antenna from different perspectives provided by this utility model;

[0048] Figure 5 A schematic diagram of the structure of a microwave oven provided by this utility model;

[0049] Figure 6 A frequency return loss and efficiency diagram of a first planar antenna in a microwave oven provided by this utility model;

[0050] Figure 7 A frequency return loss and efficiency diagram of a second planar antenna in a microwave oven provided by this utility model;

[0051] Figure 8 The heating effect diagram of placing 5 identical food items in different areas of a microwave oven provided by this utility model;

[0052] Wherein, 1-Radiating body; 2-Terminal; 3-Long side; 31-First long side; 32-Second long side; 33-Third long side; 34-Fourth long side; 4-Chamfered edge; 5-Radiating body positioning component; 51-Radiating body positioning plane; 6-Locking component; 7-Anti-slip pad; 8-Supporting platform; 9-First transition section; 10-Inner conductor rod of antenna; 11-Fixing stop; 12-Terminal male fastener; 13-Fastener; 14-Terminal male positioning plane; 15-Terminal female limiting post; 16-Second transition section; 17-First feed ground component; 18-Third transition section; 19-Terminal male retaining ring; 20-Fourth transition section; 21-Second feed ground component; 22-Microwave oven body; 23-Planar antenna; 24-First planar antenna; 25-Second planar antenna. Detailed Implementation

[0053] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0054] like Figures 1-4 As shown, this utility model provides a planar antenna, comprising:

[0055] Radiation body 1, the radiation body 1 is used to generate directional electromagnetic waves, the radiation body 1 is provided with multiple long sides 3 and multiple chamfered sides 4, the multiple long sides 3 jointly control the antenna frequency and S-parameters, and each chamfered side 4 controls the antenna S-parameters;

[0056] Terminal 2 is connected to the radiating body 1 and is fed to the radiating body 1 to form a single-stage planar antenna.

[0057] This invention proposes a planar antenna and a microwave oven. By using multiple long sides and multiple chamfered sides on the radiating body, it achieves fine adjustment and optimization of the antenna frequency and S-parameters. This design not only improves the antenna's integration and reliability but also enables it to adapt to complex communication environments and multiple frequency band requirements. More importantly, by applying this planar antenna to a microwave oven, it is possible to achieve differentiated temperature control at various points inside the microwave oven, enabling advantageous heating at different frequencies and spatial points. This satisfies the heating requirements of different ingredients and cooking needs, improving the heating effect and the accuracy of internal temperature control in the microwave oven.

[0058] Preferably, such as Figures 1-4 As shown, the long side 3 has at least four parts, wherein:

[0059] The first long side 31, together with the second long side 32, the third long side 33 and a portion of the fourth long side 34, jointly control the frequency and S-parameters of the antenna.

[0060] The second long side 32, together with the first long side 31, the third long side 33 and a portion of the fourth long side 34, jointly control the frequency and S-parameters of the antenna.

[0061] The third long side 33, together with the first long side 31, the second long side 32 and a portion of the fourth long side 34, jointly controls the frequency and S-parameters of the antenna.

[0062] The fourth long side 34, together with the first long side 31, the second long side 32 and a portion of the third long side 33, jointly controls the frequency and S-parameters of the antenna.

[0063] At least two chamfered edges 4 are provided, and the chamfered edges 4 are arranged in a corresponding manner;

[0064] In the design of a planar antenna, there are at least four long sides 3, each of which, together with a portion of the other three long sides 3, controls the antenna's frequency and S-parameters. This design utilizes the principle of multipath interference, where electromagnetic waves are reflected and interfered with when propagating along the long sides 3, thus affecting the antenna's resonant frequency and S-parameters. By precisely adjusting the size, shape, and arrangement of the long sides, fine-tuning of the antenna's frequency and S-parameters can be achieved. For example, adjusting the shape and arrangement of the long sides 3 can optimize the S-parameters and reduce signal reflection and loss.

[0065] The design of chamfered edge 4 further enhances the ability to fine-tune the antenna's S-parameters; the corresponding arrangement of chamfered edges 4 can further optimize the antenna's matching characteristics, reduce signal reflection, and improve the antenna's radiation efficiency; the design of chamfered edge 4 can also be used to adjust the antenna's directivity and polarization characteristics, thereby meeting the requirements of specific communication environments.

[0066] Preferably, such as Figures 1-4 As shown, terminal 2 includes a radiating body locking and positioning assembly, which includes a radiating body positioning component 5 and a locking component 6. One end of the radiating body positioning component 5 passes through the radiating body 1 and is connected to the radiating body 1 by the locking component 6. The tight fit between the radiating body positioning component 5 and the locking component 6 ensures a stable and reliable electrical connection between the radiating body 1 and terminal 2. This is crucial for antenna performance, as instability in the electrical connection can lead to signal loss, frequency shift, and other problems, thus affecting the overall performance of the antenna. Precise positioning and locking can reduce gaps and looseness between the radiating body 1 and other components, thereby reducing the possibility of electromagnetic interference. This is of great significance for improving the antenna's anti-interference capability and signal quality. The design of the radiating body locking and positioning assembly makes the antenna installation process simpler and faster. Operators only need to pass the radiating body positioning component 5 through the radiating body 1 and fix it with the locking component 6, without the need for complex adjustments and calibrations. When the antenna needs maintenance or replacement, the radiating body 1 can be easily removed from terminal 2 by loosening the locking component 6, thereby simplifying the maintenance process and reducing maintenance costs.

[0067] Preferably, such as Figures 1-4 As shown, the radiation body locking and positioning assembly includes: an anti-slip pad 7 and a support platform 8. One end face of the radiation body positioning member 5 is externally disposed on the locking member 6 to form a radiation body positioning plane 51. The anti-slip pad 7 is disposed between one end face of the radiation body 1 and the locking member 6. The other end of the radiation body positioning member 5 is connected to one end face of the support platform 8. The anti-slip pad 7 prevents the locking member 6 from loosening with the radiation body 1.

[0068] Preferably, such as Figures 1-4As shown, the terminal 2 includes a first transition section 9 and an inner conductor rod 10 of the antenna. The other end face of the support platform 8 is connected to one end of the inner conductor rod 10 of the antenna through the first transition section 9. The first transition section 9 serves as a connecting bridge between the support platform 8 and the inner conductor rod 10 of the antenna, ensuring that the electrical connection between the two is stable and reliable. This is crucial for the performance of the antenna, as an unstable electrical connection may lead to problems such as signal loss and frequency shift. Improving the radiation efficiency and signal quality of the antenna, the first transition section 9 firmly connects the support platform 8 and the inner conductor rod 10 of the antenna, which can enhance the stability of the entire antenna. This helps to ensure that the antenna can maintain the stability and reliability of its performance during long-term use.

[0069] Preferably, such as Figures 1-4 As shown, the terminal 2 includes a positioning and fixing assembly, which includes a fixing stop 11 and a terminal male fastener 12. The other end of the antenna inner conductor rod 10 is connected to one end of the fixing stop 11, and the other end of the fixing stop 11 is connected to one end of the terminal male fastener 12. The terminal male fastener 12 has a fastener 13 on its outer periphery near the end of the fixing stop 11, and a terminal male positioning plane 14 is provided on the outer side wall of the terminal male fastener 12. The fixing stop 11 serves as a connection and support, ensuring the stability of the antenna inner conductor rod 10 in the terminal 2 and preventing it from loosening or shifting during use. By tightly connecting the terminal male fastener 12 with the fixing stop 11, it also provides protection and isolation, preventing moisture, dust, and other impurities from the external environment from entering the terminal and affecting the antenna's performance and lifespan.

[0070] Preferably, such as Figures 1-4 As shown, the terminal 2 includes a female terminal limiting post 15 and a first grounding component 17. The other end of the male terminal fastener 12 is connected to one end of the female terminal limiting post 15, and the other end of the female terminal limiting post 15 is connected to one end of the first grounding component 17 through a second transition section 16. The main function of the female terminal limiting post 15 is to limit and fix it. One end of it is connected to the male terminal fastener 12, ensuring the stability and accuracy of the male terminal during the connection process. The design of the female terminal limiting post 15 can prevent the male terminal from shifting or loosening during insertion or removal, thereby ensuring that the electrical connection between the antenna and the connecting device is stable and reliable. The main function of the first grounding component 17 is to feed and ground. One end of the first grounding component 17 is connected to the female terminal limiting post 15 through the second transition section 16. The design of the first grounding component 17 can realize the feeding and grounding of electromagnetic wave signals, thereby ensuring that the antenna can work normally.

[0071] Preferably, such as Figures 1-4As shown, terminal 2 includes: a third transition section 18, a male terminal retainer 19, a fourth transition section 20, and a second grounding component 21. The other end of the first grounding component 17 is connected to one end of the male terminal retainer 19 via the third transition section 18, and the other end of the male terminal retainer 19 is connected to the second grounding component 21 via the fourth transition section 20. The third transition section 18 serves as the connection between the first grounding component 17 and the male terminal retainer 19, ensuring the stability and reliability of the electrical connection between them. The third transition section 18 is responsible for transmitting the electromagnetic wave signal received from the first grounding component 17 and passing it to the male terminal retainer 19. Due to potential differences in impedance and size between different components, the third transition section 18 also serves as a transition and matching component. Through its carefully designed structure and dimensions, it achieves a smooth transition from the first grounding component 17 to the male terminal retainer 19, thereby reducing signal reflection and loss during transmission.

[0072] The male terminal retainer 19 includes an upper groove and a lower edge. The upper groove connects to the lower edge. The male terminal retainer 19 is a fastener used to fix and connect different components. One end of the male terminal retainer 19 is connected to the first grounding component 17 via a third transition section 18, and the other end is connected to the second grounding component 21 via a fourth transition section 20. This connection design ensures the stability and reliability of the entire terminal structure. The male terminal retainer 19 typically features quick installation and removal, making it very convenient during antenna installation and maintenance. Operators can easily insert or remove the male terminal retainer 19, thereby achieving quick connection or disconnection of the antenna.

[0073] The fourth transition section 20 continues the electrical connection function of the third transition section 18, transmitting the signal on the male terminal retainer 19 to the second ground feeder 21; it ensures the continuity and stability of the signal during transmission; similar to the third transition section 18, the fourth transition section 20 achieves a smooth transition from the male terminal retainer 19 to the second ground feeder 21, thereby reducing signal reflection and loss during transmission;

[0074] The second feed ground component 21, as a continuation of the power supply and grounding, continues the function of the first feed ground component 17; it is responsible for transmitting electromagnetic wave signals from the terminals to other parts of the antenna and ensuring the grounding of the antenna; the second feed ground component 21 can further optimize the performance of the antenna; for example, its impedance matching characteristics can be adjusted to reduce signal reflection and loss during transmission; or its frequency response characteristics can be adjusted to meet the performance requirements within a specific frequency band.

[0075] like Figure 5As shown, this utility model also provides a microwave oven, including: a planar antenna 23 as described in any of the above claims, wherein at least two planar antennas 23 are provided, and the planar antennas 23 are installed on the top of the microwave oven body 22 through a radiating body locking and positioning assembly, wherein the planar antennas 23 are coupled to one end face of the microwave oven body 22 to generate a downward radiating electric field, and the beam direction, beam shape and beam width are controlled by adjusting the phase difference between the two planar antennas 23.

[0076] Preferably, it includes:

[0077] Phase adjuster, used to adjust the phase difference between planar antennas 23;

[0078] A temperature probe is used to collect temperature data inside the microwave oven body 22 in real time.

[0079] The controller is used to control the phase adjuster to adjust the phase difference between the planar antennas 23 based on the temperature data received from inside the microwave oven body 22, so as to achieve advantageous heating of different frequencies and different spatial points inside the microwave oven body 22.

[0080] The planar antenna 23 includes: a first planar antenna 24 and a second planar antenna 25;

[0081] By adjusting the phase difference between the first planar antenna 24 and the second planar antenna 25, the direction and shape of the beam can be controlled. This technology, known as phased array technology, utilizes the interference and superposition effects of waves to focus signals in a specific direction, thereby improving the heating effect and reliability of a certain area inside the microwave oven and ensuring uniform heating of different foods inside the microwave oven. Changes in phase not only affect the direction of the beam but also change its width. By adjusting the phase difference between the first planar antenna 24 and the second planar antenna 25, the beam can be narrowed or widened to adapt to heating foods of different positions and volumes inside the microwave oven.

[0082] The temperature probe is used to collect temperature data inside the microwave oven body 22 in real time. The controller is used to adjust the phase difference between the first planar antenna 24 and the second planar antenna 25 based on the received temperature data. This reduces the heating effect on high-temperature points of the food and enhances the heating effect on low-temperature points, thereby achieving uniform heating. In addition, by changing the phase difference between the first planar antenna 24 and the second planar antenna 25, the heating effect on a certain area of ​​the food is reduced in real time, while the heating effect on another area is enhanced, thereby achieving differentiated temperature control at various points inside the microwave oven.

[0083] likeFigure 6 As shown in the figure, the present invention provides a frequency return loss and efficiency diagram of a first planar antenna 24 in a microwave oven. The first planar antenna 24 can maintain stable performance over a wider frequency range and optimizes the antenna frequency and S-parameters, thereby improving the return loss and efficiency of the antenna and improving the performance of microwave heating technology. The parameters of the first planar antenna 24 are shown in Table 1 below:

[0084] Table 1 Parameters of the first planar antenna

[0085]

[0086] From Table 1, we can see that the first planar antenna 24 has excellent radiation capability, operating frequency range, and energy conversion efficiency.

[0087] like Figure 7 As shown in the figure, the present invention provides a frequency return loss and efficiency diagram for a second planar antenna 25 in a microwave oven. The second planar antenna 25 can maintain stable performance over a wider frequency range and optimizes the antenna frequency and S-parameters, thereby improving the return loss and efficiency of the antenna and improving the performance of microwave heating technology. The parameters of the second planar antenna 25 are shown in Table 2 below:

[0088]

[0089]

[0090] From Table 2, we can see that the second planar antenna 25 has excellent radiation capability, operating frequency range, and energy conversion efficiency.

[0091] like Figure 8 As shown in the figure, the heating effect of placing 5 identical food items in different areas in the microwave oven provided by this utility model is illustrated. The input power, heating frequency, and heating time are controlled. The positions of the 5 identical food items remain unchanged. The phase difference of the input power of the first planar antenna 24 and the second planar antenna 25 is changed. The temperatures of the 5 food items (numbered ①-⑤) are shown in Table 3 below.

[0092] Table 3. Heating data of 5 identical food items placed in different areas of a microwave oven.

[0093]

[0094] From Table 3, we found that by adjusting the phase difference between the first planar antenna 24 and the second planar antenna 25, the heating effect of the five pieces of food inside the microwave oven body 22 varies in different areas, thus achieving differentiated control of the temperature at various points inside the microwave oven body 22.

[0095] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

Claims

1. A planar antenna, characterized by, The application relates to a single-stage flat panel antenna, which comprises a radiation body for generating directional electromagnetic waves, a plurality of long edges and a plurality of cut-angle edges on the radiation body, the plurality of long edges collectively controlling the frequency and S parameter of the antenna, and each cut-angle edge controlling the S parameter of the antenna; and a terminal connected with the radiation body, which is fed to the radiation body by the terminal to form the single-stage flat panel antenna. The long edges are provided with at least four long edges, wherein: The first long edge, together with the second long edge, the third long edge and a part of the fourth long edge, collectively controls the frequency and S parameter of the antenna; 2. The planar antenna according to claim 1, wherein The second long edge, together with the first long edge, the third long edge and a part of the fourth long edge, collectively controls the frequency and S parameter of the antenna; The third long edge, together with the first long edge, the second long edge and a part of the fourth long edge, collectively controls the frequency and S parameter of the antenna; The fourth long edge, together with the first long edge, the second long edge and a part of the third long edge, collectively controls the frequency and S parameter of the antenna; The cut-angle edges are provided with at least two cut-angle edges, which are correspondingly arranged. The terminal comprises a radiation body locking and positioning assembly, which comprises a radiation body positioning member and a locking member, one end of the radiation body positioning member penetrates through the radiation body and connects the radiation body positioning member with the radiation body through the locking member. The radiation body locking and positioning assembly comprises an anti-skid gasket and a support platform, one end surface of the radiation body positioning member is arranged outside the locking member to form a radiation body positioning plane, the anti-skid gasket is arranged between one end surface of the radiation body and the locking member, and the other end of the radiation body positioning member is connected with one end surface of the support platform.

3. The planar antenna according to claim 1, wherein The terminal comprises a first transition section and an antenna inner conductor rod, and the other end surface of the support platform is connected with one end of the antenna inner conductor rod through the first transition section.

4. The planar antenna according to claim 3, wherein The terminal comprises a positioning and fixing assembly, which comprises a fixing stopper and a terminal male fastener, the other end of the antenna inner conductor rod is connected with one end of the fixing stopper, the other end of the fixing stopper is connected with one end of the terminal male fastener, the terminal male fastener is provided with a fastener on the outer periphery of one end of the fixing stopper, and an outer side wall of the terminal male fastener is provided with a terminal male positioning plane.

5. The planar antenna according to claim 4, wherein The terminal comprises a terminal female limiting column and a first feed ground, the other end of the terminal male fastener is connected with one end of the terminal female limiting column, and the other end of the terminal female limiting column is connected with one end of the first feed ground through a second transition section.

6. The planar antenna according to claim 5, wherein The terminal comprises a third transition section, a terminal male snap ring, a fourth transition section and a second feed ground, the other end of the first feed ground is connected with one end of the terminal male snap ring through the third transition section, the other end of the terminal male snap ring is connected with the second feed ground through the fourth transition section.

7. The planar antenna according to claim 6, wherein The application relates to a single-stage flat panel antenna, which comprises a radiation body for generating directional electromagnetic waves, a plurality of long edges and a plurality of cut-angle edges on the radiation body, the plurality of long edges collectively controlling the frequency and S parameter of the antenna, and each cut-angle edge controlling the S parameter of the antenna; and a terminal connected with the radiation body, which is fed to the radiation body by the terminal to form the single-stage flat panel antenna.

8. The planar antenna according to claim 7, wherein ​ 9. A microwave oven, characterized by comprising: ​ The planar antenna according to any one of claims 1-8, wherein at least two planar antennas are provided, and the planar antennas are mounted on the top of the microwave oven body through a radiating main body locking positioning assembly, and a coupling connection is formed between the planar antennas and an end surface of the microwave oven body to generate a downward radiating electric field, and the control of the beam direction, the beam shape and the beam width is realized by adjusting the phase difference between the planar antennas.

10. The microwave oven as claimed in claim 9, wherein Comprise: a phase adjuster for adjusting the phase difference between the planar antennas; a temperature probe for collecting temperature data inside the microwave oven body in real time; a controller, the temperature probe is electrically connected with the phase adjuster through the controller, and the controller is used for receiving the temperature data inside the microwave oven body and controlling the phase adjuster to adjust the phase difference between the planar antennas, so as to realize the dominant heating of different frequencies and different spatial points inside the microwave oven body.

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