L-shaped antenna and microwave oven

Abstract

The invention provides an L-shaped antenna and a microwave oven, the L-shaped antenna comprises an L-shaped radiation branch knot, the L-shaped radiation branch knot comprises a first radiation branch knot and a second radiation branch knot, the first radiation branch knot is connected with the second radiation branch knot, and the first radiation branch knot and the second radiation branch knot control the antenna frequency together with each other; the S parameter of the antenna is influenced; the L-shaped radiation branch knot is electrically connected with the high-power terminal, so that an antenna in a Monopole form is formed; the L-shaped antenna is simple in structure and convenient to install, the stable performance of the antenna can be kept in a wider frequency range, the S parameter of the antenna is optimized, the return loss and efficiency of the antenna are improved, the performance of the microwave heating technology is improved, the L-shaped antenna is applied to the microwave oven, the heating efficiency of the microwave oven is high, the temperature of each point in the microwave oven is controllable, and the service life of the microwave oven is prolonged. The temperature of each point in the microwave oven is controlled in a differentiated manner, and diversified food materials can be uniformly heated.

Description

Technical Field

[0001] The invention relates to the technical field of antenna manufacturing in the household appliance industry, and in particular to an L-shaped antenna and a microwave oven. Background Art

[0002] In the field of microwave heating technology, the performance of the antenna has a decisive influence on the heating efficiency and uniformity of the microwave oven. Although the traditional microwave oven antenna design, such as linear or rod-shaped antennas, plays a certain role in the microwave heating process, its limitations are becoming increasingly prominent. These antenna structures are relatively simple and it is difficult to achieve advantageous heating of different spatial points inside the microwave oven, resulting in unsatisfactory heating efficiency and uniformity.

[0003] In recent years, with the continuous advancement of antenna technology, new antenna structures have emerged, bringing new vitality to the field of microwave heating. Among them, special-shaped antennas have gradually emerged in the field of microwave heating with their unique structure and performance characteristics. Special-shaped antennas achieve precise control of antenna frequency by cleverly changing the shape and size of their radiation branches, and significantly affect the S parameters (scattering parameters) of the antenna. This innovative antenna design not only improves the overall performance of the antenna, but also opens up a new path for the heating optimization of microwave ovens.

[0004] However, despite the many advantages of special-shaped antennas, there are still some problems that need to be solved in the existing special-shaped antenna designs. Some special-shaped antennas are only equipped with a single radiation branch, which limits the fine adjustment of the antenna frequency and the further optimization of the S parameters. In addition, some special-shaped antennas also expose many inconveniences during installation and use, such as limited installation position and difficulty in adjustment. These problems have hindered the widespread application of special-shaped antennas in microwave ovens to a certain extent.

[0005] On the other hand, the heating mechanism of traditional microwave ovens also has obvious shortcomings. Conventional microwave ovens usually use a control circuit to control the magnetron to continuously generate microwaves, which are then coupled into the cooking cavity through a waveguide system. In order to evenly distribute the microwave energy in the cooking cavity, a rotatable metal fan stirrer is set in the microwave oven. However, this heating mechanism is powerless when faced with different food materials or different food placements inside the microwave oven. Since the temperature of each space inside the microwave oven is uncontrollable, the problem of uneven heating of food often occurs, and the food may even be burnt.

[0006] More importantly, the current conventional microwave ovens generally adopt a single magnetron design, which can achieve uniform temperature in each space inside the microwave oven, but this uniformity is fixed and uncontrollable. This design is not ideal for the internal heating effect of food, especially for scenarios that require differentiated control of the temperature of each point inside the microwave oven, which is even more difficult for conventional microwave ovens to handle.

[0007] The disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application, nor does it necessarily provide technical guidance. In the absence of clear evidence that the above content has been disclosed before the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0008] In order to solve the above technical problems, the present invention proposes an L-shaped antenna and a microwave oven, which have a simple structure and are easy to install, so that the antenna can maintain stable performance in a wider frequency range and optimize the S parameters of the antenna, thereby improving the return loss and efficiency of the antenna, improving the performance of microwave heating technology, and applying the L-shaped antenna to the microwave oven, so as to achieve high heating efficiency of the microwave oven and controllable temperature of each point inside, so that a variety of ingredients can be heated evenly.

[0009] In order to achieve the above object, the technical solution of the present invention is as follows:

[0010] The present invention provides an L-shaped antenna, comprising:

[0011] An L-shaped radiation branch, wherein the L-shaped radiation branch comprises: a first radiation branch and a second radiation branch, wherein the first radiation branch is connected to the second radiation branch, and the first radiation branch and the second radiation branch respectively control the antenna frequency together with each other and affect the S parameter of the antenna;

[0012] A high-power terminal, the L-shaped radiation branch is electrically connected to the high-power terminal to form a Monopole-type antenna.

[0013] The present invention proposes an L-shaped antenna and a microwave oven, which have a simple structure and are easy to install, so that the antenna can maintain stable performance in a wider frequency range and optimize the S parameters of the antenna, thereby increasing the return loss and efficiency of the antenna and improving the performance of the microwave heating technology. The L-shaped antenna is applied to the microwave oven to achieve high heating efficiency and controllable temperatures at various points inside the microwave oven, which not only realizes differentiated control of the temperatures at various points inside the microwave oven, but also allows a variety of food to be heated evenly.

[0014] As a preferred technical solution, it includes: an antenna fixing part, which is connected to the first radiation branch or the second radiation branch, and the high-power terminal includes: a radiation body locking and positioning assembly, and the radiation body locking and positioning assembly includes: a radiation body positioning part and a locking assembly, one end of the radiation body positioning part passes through the antenna fixing part and the radiation body positioning part is connected to the antenna fixing part through the locking assembly.

[0015] As a preferred technical solution, the locking assembly includes: an anti-slip gasket and a first locking piece, the other end surface of the radiation body positioning piece is externally arranged on the first locking piece to form a radiation body positioning plane, one end of the antenna fixing piece is connected to the other end of the antenna transition section, and the anti-slip gasket is arranged between the other end of the antenna fixing piece and the first locking piece.

[0016] As a preferred technical solution, the high-power terminal includes: a fixed antenna assembly, the fixed antenna assembly includes: a tail pressure piece, the inner cavity of the tail pressure piece is provided with an insulating body piece, one end of the conductor rod inside the antenna is passed through the insulating body piece, and one end of the antenna transition section is connected to the other end of the conductor rod inside the antenna.

[0017] As a preferred technical solution, the fixed antenna assembly also includes: a positioning antenna component plane, a second locking component is provided on the outer cover of the positioning antenna component plane, a fastening thread is provided on the outer side wall of the second locking component, and one end of the tail pressure component is connected to the other end of the positioning antenna component plane.

[0018] As a preferred technical solution, the high-power terminal includes: a feed ground component, the feed ground component includes: a terminal female limiting column and a first feeding ground component, one end of the positioning antenna component plane is connected to the other end of the terminal female limiting column, and one end of the terminal female limiting column is connected to the other end of the first feeding ground component through a first transition section.

[0019] As a preferred technical solution, the feed-in ground component includes: a terminal female clamping piece, and one end of the first feed-in ground piece is connected to the other end of the terminal female clamping piece through a second transition section.

[0020] As a preferred technical solution, the feed-in ground component includes: a second feed-in ground member, and one end of the terminal female clamping member is connected to the second feed-in ground member through a third transition section.

[0021] The present invention also provides a microwave oven, comprising: an L-shaped antenna as described in any of the above items, wherein at least two L-shaped antennas are provided, and the L-shaped antenna is installed on the top of the microwave oven body through a fixed antenna assembly, and a coupling connection is formed between the L-shaped antenna and an end surface of the microwave oven body 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 L-shaped antennas.

[0022] As the preferred technical solution, it includes:

[0023] A phase adjuster, used to adjust the phase difference between the L-shaped antennas;

[0024] A temperature probe, used for collecting temperature data inside the microwave oven body in real time;

[0025] A controller, wherein the temperature probe is electrically connected to the phase adjuster through the controller, and the controller is used to control the phase adjuster to adjust the phase difference between the L-shaped antennas according to the temperature data received from the inside of the microwave oven body, so as to achieve advantageous heating of different spatial points inside the microwave oven body.

[0026] The L-shaped antenna and microwave oven provided by the present invention have the following beneficial effects:

[0027] 1) Its structure is simple and easy to install, so that the antenna can maintain stable performance in a wider frequency range and optimize the S parameters of the antenna, thereby improving the return loss and efficiency of the antenna, improving the performance of microwave heating technology, and applying the L-shaped antenna to the microwave oven to achieve high heating efficiency and controllable temperature at various points inside the microwave oven, which not only realizes differentiated control of the temperature at various points inside the microwave oven, but also allows a variety of food to be heated evenly;

[0028] 2) The first radiation branch and the second radiation branch jointly control the frequency of the antenna and affect the S parameters of the antenna, which can optimize the impedance matching and frequency response of the antenna, thereby maintaining stable performance in a wider frequency range; in addition, the frequency response of the L-shaped antenna can be optimized by connecting the first radiation branch and the second radiation branch to each other, and by expanding the bandwidth of the antenna, stable radiation performance can be maintained in a wider frequency range; the L-shaped radiation branch is electrically connected to the high-power terminal to form a Monopole-shaped antenna, and the high-power terminal is used to transmit the input electric power to the L-shaped radiation branch, thereby exciting the radiation field of the antenna. This structure helps to simplify the installation and connection process of the antenna; by accurately adjusting the structure of the L-shaped radiation branch and the connection relationship with the high-power terminal, good impedance matching between the antenna and the feeding system can be achieved. Good impedance matching can reduce signal reflection and reduce the value of S11 (input reflection coefficient), thereby improving the return loss and efficiency of the antenna, thereby ensuring the stable and efficient performance of the antenna in applications such as microwave heating technology;

[0029] As the radiation element of the microwave oven, the L-shaped antenna is responsible for converting the input power into an effective radiation field, which makes the microwave oven have high heating efficiency and controllable temperature at each point inside, so that a variety of ingredients can be heated evenly;

[0030] 3) The present invention also provides a microwave oven, in which an L-shaped antenna is applied to the microwave oven, achieving the advantages of simple structure, convenient installation, high heating efficiency and controllable temperature at each point inside. These characteristics enable the microwave oven to better adapt to the heating needs of various food materials, improve the heating efficiency and the quality of food, and by adjusting the phase difference between the L-shaped antennas, the control of the beam direction and beam shape can be achieved. By utilizing the interference and superposition effects of waves, the signal can be focused in a specific direction, thereby improving the heating effect and reliability of a certain area inside the microwave oven, thereby achieving uniform heating of different food materials inside the microwave oven, and by adjusting the phase difference between the L-shaped antennas, the control of the beam width can also be achieved. By adjusting the phase difference between the L-shaped antennas, the beam width can be narrowed or widened to adapt to the heating of food at different positions and different volumes inside the microwave oven; in addition, the L-shaped antenna can ensure that microwaves are evenly distributed in the microwave oven cavity by radiating an electric field downward and combining the phase difference adjustment. This design avoids reflection and focusing of microwaves in the cavity, thereby reducing hot spots and cold spots during the heating process and improving heating uniformity. At the same time, since microwaves can penetrate food more effectively, the heating efficiency is also significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of an L-shaped antenna provided by the present invention;

[0032] Figure 2 A schematic diagram of the structure of an L-shaped antenna provided by the present invention from different viewing angles;

[0033] Figure 3 A schematic diagram of the structure of an L-shaped antenna provided by the present invention from different viewing angles;

[0034] Figure 4 A schematic diagram of the structure of an L-shaped antenna provided by the present invention from different viewing angles;

[0035] Figure 5 A schematic structural diagram of a microwave oven provided by the present invention;

[0036] Figure 6 A frequency return loss and efficiency diagram of a first L-shaped antenna in a microwave oven provided by the present invention;

[0037] Figure 7 A frequency return loss and efficiency diagram of a second L-shaped antenna in a microwave oven provided by the present invention;

[0038] Figure 8 A diagram showing the heating effect of placing 5 pieces of the same food in different areas in the microwave oven provided by the present invention;

[0039] Among them, 1-L-shaped radiation branch; 2-high-power terminal; 3-first radiation branch; 4-second radiation branch; 5-antenna fixing part; 6-radiation body positioning plane; 7-anti-slip gasket; 8-first locking part; 9-tail pressure part; 10-insulator part; 11-antenna inner conductor rod; 12-antenna transition section; 13-positioning antenna part plane; 14-second locking part; 15-terminal female limiting column; 16-first transition section; 17-first feeding ground part; 18-second transition section; 19-terminal female clamping part; 20-third transition section; 21-second feeding ground part; 22-microwave oven body; 23-first L-shaped antenna; 24-second L-shaped antenna. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] like Figure 1-4 As shown, the present invention provides an L-shaped antenna, comprising:

[0042] An L-shaped radiation branch 1, wherein the L-shaped radiation branch 1 comprises: a first radiation branch 3 and a second radiation branch 4, wherein the first radiation branch 3 is connected to the second radiation branch 4, and the first radiation branch 3 and the second radiation branch 4 respectively control the antenna frequency together with each other and affect the S parameter of the antenna;

[0043] The high-power terminal 2, the L-shaped radiation branch 1 is electrically connected to the high-power terminal 2 to form a Monopole-type antenna.

[0044] The present invention proposes an L-shaped antenna and a microwave oven, which have a simple structure and are easy to install, so that the antenna can maintain stable performance in a wider frequency range and optimize the S parameters of the antenna, thereby increasing the return loss and efficiency of the antenna and improving the performance of the microwave heating technology. The L-shaped antenna is applied to the microwave oven to achieve high heating efficiency and controllable temperatures at various points inside the microwave oven, which not only realizes differentiated control of the temperatures at various points inside the microwave oven, but also allows a variety of food to be heated evenly.

[0045] Preferably, it includes: an antenna fixing part 5, which is connected to the first radiation branch 3 or the second radiation branch 4, and the high-power terminal 2 includes: a radiation body locking and positioning component, which includes: a radiation body positioning part and a locking component, one end of the radiation body positioning part passes through the antenna fixing part 5 and connects the radiation body positioning part to the antenna fixing part 5 through the locking component, the antenna fixing part 5, the radiation body positioning part and the locking component together constitute an efficient and stable signal path, ensuring that the microwave signal can be accurately and quickly transmitted to the L-shaped radiation branch 1, and finally radiated into the cavity of the microwave oven body to achieve heating of food; these three components, through their structural design and mutual cooperation, jointly ensure the stability and reliability of the L-shaped radiation branch 1, thereby improving the overall performance and heating efficiency of the microwave oven.

[0046] Preferably, the locking assembly includes: an anti-slip gasket 7 and a first locking piece 8, the other end surface of the radiation body positioning piece is externally arranged on the first locking piece 8 to form a radiation body positioning plane 6, one end of the antenna fixing piece 5 is connected to the other end of the antenna transition section 12, and the anti-slip gasket 7 is arranged between the other end of the antenna fixing piece 5 and the first locking piece 8; the anti-slip gasket 7 prevents loosening between the first locking piece 8 and the antenna fixing piece 5, and in addition, this structural design plays an important role in ensuring the stability of the antenna connection, simplifying the antenna installation process and improving the antenna performance in the high-power terminal 2 of the microwave oven; this design not only improves the overall performance and heating efficiency of the microwave oven, but also reduces the installation difficulty and cost.

[0047] Preferably, the high-power terminal 2 includes: a fixed antenna assembly, the fixed antenna assembly includes: a tail pressure piece 9, the inner cavity of the tail pressure piece 9 is provided with an insulator 10, one end of the antenna inner conductor rod 11 is inserted into the insulator 10, one end of the antenna transition section 12 is connected to the other end of the antenna inner conductor rod 11, the tail pressure piece 9 is a part of the fixed antenna assembly, and the antenna inner conductor rod 11 is supported and fixed by the insulator 10 in its inner cavity. This design ensures the stability of the antenna in the electronic device and prevents displacement or damage caused by vibration or external interference. The insulator 10 is arranged in the inner cavity of the tail pressure piece 9 to connect the antenna inner conductor rod 11 with The tail pressure piece 9 is electrically isolated, which helps prevent electrical short circuits or signal interference and ensures the normal electrical performance of the antenna. The inner conductor rod 11 of the antenna is the main part of the antenna and is responsible for transmitting and receiving electromagnetic wave signals. Its other end is connected to the antenna transition section 12. The antenna transition section 12 matches and connects the inner conductor rod 11 of the antenna with the internal circuit of the electronic device. This design ensures the effective transmission and reception of signals and provides a strong guarantee for the normal communication of the electronic device. The design of the fixed antenna assembly makes the installation and maintenance of the antenna more convenient. The antenna can be easily installed or removed through simple connection and disassembly operations, which facilitates regular inspection and maintenance of the antenna.

[0048] Preferably, the fixed antenna assembly also includes: a positioning antenna component plane 13, a second locking component 14 is provided on the outer cover of the positioning antenna component plane 13, a fastening thread is provided on the outer side wall of the second locking component 14, and one end of the tail pressure component 9 is connected to the other end of the positioning antenna component plane 13; the positioning antenna component plane 13 and the second locking component 14 in the fixed antenna assembly are designed to position and fix the antenna in the microwave oven, enhance the connection strength and stability, and facilitate installation and maintenance.

[0049] Preferably, the high-power terminal includes: a feeding ground component, the feeding ground component includes: a terminal female limiting column 15 and a first feeding ground component 17, one end of the positioning antenna component plane 13 is connected to the other end of the terminal female limiting column 15, and one end of the terminal female limiting column 15 is connected to the other end of the first feeding ground component 17 through a first transition section 16; the connection between the positioning antenna component plane 13 and the terminal female limiting column 15 ensures that the signal can be stably transmitted from the outside to the antenna; the terminal female limiting column 15 serves as a signal transmission channel, and its design can reduce signal loss and interference during transmission; the design of the first transition section 16 enables the signal to be smoothly transmitted from the terminal female limiting column 15 to the first feeding ground component 17; this smooth transition reduces the possibility of signal reflection and attenuation, thereby improving the stability and efficiency of signal transmission.

[0050] Preferably, the feeding ground component includes: a terminal female clamping piece 19, one end of the first feeding ground piece 17 is connected to the other end of the terminal female clamping piece 19 through a second transition section 18; the design of the second transition section 18 makes the connection between the first feeding ground piece 17 and the terminal female clamping piece 19 more stable; the terminal female clamping piece 19 is connected by the upper groove of the terminal male clamping ring and the lower edge of the terminal male clamping ring. Through a reasonable transition structure, the risk of loose connection or breakage caused by improper connection or vibration and other factors can be reduced; a stable connection not only helps to maintain the integrity of the signal, but also reduces the loss of the signal during transmission; this helps to ensure that the microwave signal can be efficiently transmitted to the cavity of the microwave oven body, thereby improving the heating efficiency.

[0051] Preferably, the feeding ground component includes: a second feeding ground component 21, and one end of the terminal female clamping component 19 is connected to the second feeding ground component 21 through a third transition section 20; the third transition section 20 serves as a bridge for signal transmission, ensuring that the signal can be continuously transmitted from the terminal female clamping component 19 to the second feeding ground component 21; this design avoids interruption or loss of the signal during transmission and ensures the integrity of the signal; the design of the third transition section 20 not only takes into account the needs of signal transmission, but also pays attention to the stability of the connection; through reasonable structural design and material selection, it can be ensured that the connection between the terminal female clamping component 19 and the second feeding ground component 21 has sufficient strength to withstand the vibration and impact force generated by the microwave oven during operation.

[0052] like Figure 1-4As shown, the present invention provides an L-shaped antenna, comprising: an L-shaped radiating branch 1, the L-shaped radiating branch 1 comprising: a first radiating branch 3 and a second radiating branch 4, the first radiating branch 3 is connected to the second radiating branch 4, the first radiating branch 3 and the second radiating branch 4 respectively control the antenna frequency together with each other and affect the S parameter of the antenna, the antenna fixing part 5 is connected to the second radiating branch 4, one end of the radiating body positioning part passes through the antenna fixing part 5 and the radiating body positioning part is connected to the antenna fixing part 5 through the locking assembly, the other end surface of the radiating body positioning part is externally arranged on the first locking part 8 to form a radiating body positioning plane 6, one end of the antenna fixing part 5 is connected to the other end of the antenna transition section 12, the anti-slip pad 7 is arranged between the other end of the antenna fixing part 5 and the first locking part 8, and the inner surface of the tail pressure part 9 is provided with a plurality of radiating body positioning planes 6, and the plurality of radiating body positioning planes 6 are provided with a plurality of radiating body positioning planes 6. The cavity is provided with an insulator 10, one end of the antenna inner conductor rod 11 is penetrated in the insulator 10, one end of the antenna transition section 12 is connected to the other end of the antenna inner conductor rod 11, the positioning antenna component plane 13 is outer-circuited with a second locking component 14, and the outer side wall of the second locking component 14 is provided with a fastening thread, one end of the tail pressure component 9 is connected to the other end of the positioning antenna component plane 13, one end of the positioning antenna component plane 13 is connected to the other end of the terminal female limiting column 15, one end of the terminal female limiting column 15 is connected to the other end of the first feeding ground component 17 through the first transition section 16, one end of the first feeding ground component 17 is connected to the other end of the terminal female clamping component 19 through the second transition section 18, and one end of the terminal female clamping component 19 is connected to the second feeding ground component 21 through the third transition section 20 to form a Monopo The L-shaped radiating branch 1 is composed of a first radiating branch 3 and a second radiating branch 4, which jointly control the frequency of the antenna and affect the S parameter (scattering parameter) of the antenna, thereby optimizing the frequency response and bandwidth of the antenna; this design enables the antenna to achieve efficient energy radiation and reception within a specific frequency band, and is suitable for various wireless communication applications;

[0053] The Monopole antenna has a relatively high radiation efficiency, which can reduce energy loss and reflection, thereby improving the overall performance of the antenna; the L-shaped antenna of the present invention is precisely designed and adjusted to further optimize its radiation efficiency, and is suitable for wireless communication scenarios that require high-efficiency energy transmission.

[0054] like Figure 5As shown, the present invention also provides a microwave oven, as described in any of the above L-shaped antennas, at least two L-shaped antennas are provided, the L-shaped antennas are used to transmit microwave signals, the L-shaped antennas are installed on the top of the microwave oven body 22 through a fixed antenna assembly, and a coupling connection is formed between the L-shaped antenna and an end surface of the microwave oven body 22 to generate a downward radiating electric field; the beam direction, beam shape and beam width are controlled by adjusting the phase difference between the L-shaped antennas, and the input power enters the high-power terminal 2 from the feeder and is radiated out by the L-shaped radiation branch 1;

[0055] Preferably, it includes:

[0056] A phase adjuster (not shown), used to adjust the phase difference between the first L-shaped antenna 23 and the second L-shaped antenna 24;

[0057] A temperature probe (not shown) for collecting temperature data inside the microwave oven body 22 in real time;

[0058] a controller (not shown), wherein the temperature probe (not shown) is electrically connected to the phase adjuster (not shown) through the controller (not shown), and the controller (not shown) is used to control the phase adjuster to adjust the phase difference between the first L-shaped antenna 23 and the second L-shaped antenna 24 according to the temperature data received from the inside of the microwave oven body 22, so as to achieve advantageous heating of different spatial points inside the microwave oven body 22;

[0059] By adjusting the phase difference between the first L-shaped antenna 23 and the second L-shaped antenna 24, the control of the beam direction and the beam shape can be achieved. By utilizing the interference and superposition effects of waves, the signal can be focused in a specific direction, thereby improving the heating effect and reliability of a certain area inside the microwave oven, thereby achieving uniform heating of different food ingredients inside the microwave oven. By adjusting the phase difference between the first L-shaped antenna 23 and the second L-shaped antenna 24, the beam width can also be controlled. By adjusting the phase difference between the first L-shaped antenna 23 and the second L-shaped antenna 24, the beam width can be narrowed or widened to adapt to the heating of food at different positions and different volumes inside the microwave oven. In addition, the L-shaped antenna can ensure that microwaves are evenly distributed in the microwave oven cavity by radiating an electric field downward and adjusting the phase difference. This design avoids reflection and focusing of microwaves in the cavity, thereby reducing hot spots and cold spots during the heating process and improving heating uniformity. At the same time, since microwaves can penetrate food more effectively, the heating efficiency is also significantly improved.

[0060] The temperature probe (not shown) collects temperature data inside the microwave oven body 22 in real time. The controller is used to control the phase adjuster (not shown) to adjust the phase difference between the first L-shaped antenna 23 and the second L-shaped antenna 24 according to the temperature data received inside the microwave oven body 22. By changing the phase, the heating effect of the high-temperature area in the microwave oven body 22 is weakened and the heating effect of the low-temperature area is enhanced in real time, thereby achieving high heating efficiency of the microwave oven and controllable temperature at each point inside, so that a variety of ingredients can be heated evenly.

[0061] like Figure 6 As shown, a frequency return loss and efficiency diagram of a first L-shaped antenna 23 in a microwave oven provided by the present invention is shown. The first L-shaped antenna 23 can maintain stable performance in a wider frequency range and optimize the S parameters of the antenna, thereby improving the return loss and efficiency of the antenna and improving the performance of the microwave heating technology. The parameters of the first L-shaped antenna 23 are shown in Table 1 below:

[0062] Table 1 Parameters of the first L-type antenna

[0063]

[0064] From Table 1, we can see that the radiation capability, operating frequency range and energy conversion efficiency of the first L-shaped antenna 23 are excellent.

[0065] like Figure 7 As shown, a frequency return loss and efficiency diagram of a second L-shaped antenna 24 in a microwave oven provided by the present invention is shown. The second L-shaped antenna 24 can maintain stable performance in a wider frequency range and optimize the S parameters of the antenna, thereby improving the return loss and efficiency of the antenna and improving the performance of the microwave heating technology. The parameters of the second L-shaped antenna 24 are shown in Table 2 below:

[0066]

[0067]

[0068] From Table 2, we can see that the second L-shaped antenna 24 has excellent radiation capability, operating frequency range and energy conversion efficiency.

[0069] like Figure 8 As shown, the heating effect diagram of 5 pieces of the same food in different areas is placed in the microwave oven provided by the present invention, the input power, heating frequency, heating time are controlled, the positions of the 5 pieces of the same food remain unchanged, and the phase of the input power of the first L-shaped antenna 23 and the second L-shaped antenna 24 is changed. The temperatures of the 5 pieces of food (numbered ①-⑤) are as shown in Table 3 below.

[0070] Table 3 Heating data of 5 pieces of the same food in different areas of the microwave oven

[0071]

[0072] From Table 3, we find that by adjusting the phase difference between the first L-shaped antenna 23 and the second L-shaped antenna 24, the microwave oven has different heating effects on the five pieces of food in different areas, thereby achieving differentiated control of the temperature of each point inside the microwave oven.

[0073] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all various changes or equivalent substitutions falling within the scope of the claims of the present application are included. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope protected by the present invention.

Claims

1. An L-shaped antenna, characterized in that: include: An L-shaped radiation branch, wherein the L-shaped radiation branch comprises: a first radiation branch and a second radiation branch, wherein the first radiation branch is connected to the second radiation branch, and the first radiation branch and the second radiation branch respectively control the antenna frequency together with each other and affect the S parameter of the antenna; The L-shaped radiation branch is electrically connected to the high-power terminal to form a monopole antenna.

2. The L-shaped antenna according to claim 1, characterized in that: include: An antenna fixing part, wherein the antenna fixing part is connected to the first radiation branch or the second radiation branch, and the high-power terminal comprises: a radiation body locking and positioning component, wherein the radiation body locking and positioning component comprises: a radiation body positioning part and a locking component, and one end of the radiation body positioning part passes through the antenna fixing part and the radiation body positioning part is connected to the antenna fixing part through the locking component.

3. The L-shaped antenna according to claim 2, characterized in that: The locking assembly includes: an anti-slip gasket and a first locking piece. The other end surface of the radiation body positioning piece is externally arranged on the first locking piece to form a radiation body positioning plane. One end of the antenna fixing piece is connected to the other end of the antenna transition section. The anti-slip gasket is arranged between the other end of the antenna fixing piece and the first locking piece.

4. The L-shaped antenna according to claim 3, characterized in that: The high-power terminal includes: a fixed antenna assembly, the fixed antenna assembly includes: a tail pressure piece, the inner cavity of the tail pressure piece is provided with an insulating body, one end of the antenna inner conductor rod is penetrated through the insulating body, and one end of the antenna transition section is connected to the other end of the antenna inner conductor rod.

5. The L-shaped antenna according to claim 4, characterized in that: The fixed antenna assembly also includes: a positioning antenna component plane, a second locking component is disposed on the outer cover of the positioning antenna component plane, a fastening thread is disposed on the outer side wall of the second locking component, and one end of the tail pressure component is connected to the other end of the positioning antenna component plane.

6. The L-shaped antenna according to claim 5, characterized in that: The high-power terminal includes: a feed ground component, which includes: a terminal female limiting column and a first feed ground component, one end of the positioning antenna component plane is connected to the other end of the terminal female limiting column, and one end of the terminal female limiting column is connected to the other end of the first feed ground component through a first transition section.

7. The L-shaped antenna according to claim 6, characterized in that: The ground feed component comprises: a terminal female clamping piece, one end of the first ground feed piece is connected to the other end of the terminal female clamping piece through a second transition section.

8. The L-shaped antenna according to claim 7, characterized in that: The ground feed component comprises: a second ground feed component, and one end of the terminal female clamping component is connected to the second ground feed component through a third transition section.

9. A microwave oven, characterized in that: include: The L-shaped antenna and microwave oven body as described in any one of claims 1-8, wherein at least two L-shaped antennas are provided, and the L-shaped antenna is installed on the top of the microwave oven body by fixing the antenna assembly, and a coupling connection is formed between the L-shaped antenna and an end surface of the microwave oven body 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 L-shaped antennas.

10. The microwave oven according to claim 9, characterized in that include: A phase adjuster, used to adjust the phase difference between the L-shaped antennas; Temperature probe, used to collect real-time temperature data inside the microwave oven; A controller, wherein the temperature probe is electrically connected to the phase adjuster through the controller, and the controller is used to control the phase adjuster to adjust the phase difference between the L-shaped antennas according to the temperature data received from the inside of the microwave oven body, so as to achieve advantageous heating of different spatial points inside the microwave oven body.

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