L-shaped antenna and microwave oven

Abstract

The utility model 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 respectively 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] This utility model relates to the field of antenna manufacturing technology in the home appliance industry, specifically to an L-shaped antenna and a microwave oven. Background Technology

[0002] In the field of microwave heating technology, antenna performance has a decisive impact on the heating efficiency and uniformity of microwave ovens. Traditional microwave oven antenna designs, such as linear or rod antennas, while playing a role in the microwave heating process, are increasingly showing their limitations. These antenna structures are relatively simple and struggle to achieve targeted 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 microwave heating field. Among them, irregularly shaped antennas, with their unique structure and performance characteristics, are gradually gaining prominence in microwave heating. By cleverly altering the shape and size of their radiating branches, irregularly shaped antennas achieve precise control over the antenna frequency and significantly influence the antenna's S-parameters (scattering parameters). This innovative antenna design not only improves the overall performance of the antenna but also opens up new avenues for optimizing microwave oven heating.

[0004] However, despite the numerous advantages of irregularly shaped antennas, existing designs still face several unresolved issues. Some irregularly shaped antennas are equipped with only a single radiating stub, which limits the fine-tuning of the antenna frequency and further optimization of S-parameters. Furthermore, some irregularly shaped antennas exhibit various inconveniences during installation and use, such as limited installation locations and difficulty in adjustment. These problems, to some extent, hinder the widespread application of irregularly shaped antennas in microwave ovens.

[0005] On the other hand, the heating mechanism of traditional microwave ovens also has significant shortcomings. Conventional 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 installed inside. However, this heating mechanism proves inadequate when dealing with foods of different textures or placed in different positions within the microwave oven. Because the temperature in different areas inside the microwave oven is uncontrollable, uneven heating of food is common, and food may even burn.

[0006] More importantly, most traditional microwave ovens currently use a single magnetron design. While this can achieve temperature uniformity throughout the oven's interior, this uniformity is fixed and uncontrollable. This design is not ideal for heating food internally, especially in scenarios requiring differentiated temperature control at various points within the oven, where traditional microwave ovens are ill-suited.

[0007] The disclosure of the above Background Art is only for the purpose of assisting in understanding the inventive concept and technical solutions of the utility model, and it does not necessarily belong to the prior art of the present patent application, nor does it necessarily give technical teaching; in the absence of explicit evidence that the above-mentioned content has been disclosed before the filing date of the present patent application, the above-mentioned background art should not be used to evaluate the novelty and inventiveness of the present application. Utility model content

[0008] In order to solve the above technical problems, the utility model provides a kind of L-type antenna and microwave oven, its structure is simple, easy to install, so that antenna can keep stable performance in wider frequency range, and optimize the S parameter of antenna, to improve the return loss and efficiency of antenna, improve the performance of microwave heating technology, and L-type antenna is applied to microwave oven, realize that microwave oven heating efficiency is high and each point temperature inside is controllable, so that diversified food material can be heated evenly.

[0009] In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0010] The utility model provides a kind of L-type antenna, comprising:

[0011] L-shaped radiation branch, the L-shaped radiation branch includes: first radiation branch and second radiation branch, the first radiation branch is connected with the second radiation branch, and the first radiation branch and the second radiation branch are respectively with the opposite party common control antenna frequency and influence the S parameter of antenna;

[0012] High power terminal, the L-shaped radiation branch is electrically connected with the high power terminal to form the antenna of Monopo l e form.

[0013] The utility model provides a kind of L-type antenna and microwave oven, its structure is simple, easy to install, so that antenna can keep stable performance in wider frequency range, and optimize the S parameter of antenna, to improve the return loss and efficiency of antenna, improve the performance of microwave heating technology, and L-type antenna is applied to microwave oven, realize that microwave oven heating efficiency is high and each point temperature inside is controllable, not only realize the difference control microwave oven each point temperature inside, more diversified food material can be heated evenly.

[0014] As preferred technical scheme, comprising: antenna fixing piece, the antenna fixing piece is connected with the first radiation branch or the second radiation branch, and the high power terminal includes: radiation main body locking positioning assembly, the radiation main body locking positioning assembly includes: radiation main body positioning piece and locking assembly, one end of the radiation main body positioning piece passes through the antenna fixing piece and is connected with the antenna fixing piece by the locking assembly.

[0015] As a preferred technical scheme, the locking assembly comprises: a non-slip washer and a first locking piece, the other end surface of the radiation body positioning piece is externally provided with the first locking piece to form a radiation body positioning plane, one end of the antenna fixing piece is connected with the other end of the antenna transition section, and the non-slip washer is arranged between the other end of the antenna fixing piece and the first locking piece.

[0016] As a preferred technical scheme, the high-power terminal comprises: a fixed antenna assembly, the fixed antenna assembly comprises: a tail pressing piece, an inner cavity of the tail pressing piece is provided with an insulator piece, one end of an antenna inner conductor rod is arranged in the insulator piece, and one end of the antenna transition section is connected with the other end of the antenna inner conductor rod.

[0017] As a preferred technical scheme, the fixed antenna assembly further comprises: a positioning antenna piece plane, the positioning antenna piece plane is externally provided with a second locking piece, a fastening thread is arranged on the outer side wall of the second locking piece, and one end of the tail pressing piece is connected with the other end of the positioning antenna piece plane.

[0018] As a preferred technical scheme, the high-power terminal comprises: a feed ground assembly, the feed ground assembly comprises: a terminal female head limiting column and a first feed ground piece, one end of the positioning antenna piece plane is connected with the other end of the terminal female head limiting column, and one end of the terminal female head limiting column is connected with the other end of the first feed ground piece through a first transition section.

[0019] As a preferred technical scheme, the feed ground assembly comprises: a terminal female head clamping piece, one end of the first feed ground piece is connected with the other end of the terminal female head clamping piece through a second transition section.

[0020] As a preferred technical scheme, the feed ground assembly comprises: a second feed ground piece, one end of the terminal female head clamping piece is connected with the second feed ground piece through a third transition section.

[0021] The utility model also provides a microwave oven, include: as any above L type antenna, at least have two, the L type antenna is installed on the top of the microwave oven body through the fixed antenna assembly, the L type antenna and the one end surface between microwave oven body form coupling connection, to produce downward radiation electric field, through adjusting the phase difference between the L type antenna realizes the control to beam direction, beam shape and beam width.

[0022] As a preferred technical scheme, comprising:

[0023] A phase adjuster is arranged for adjusting the phase difference between the L type antennas.

[0024] A temperature probe is arranged for collecting temperature data inside the microwave oven body in real time.

[0025] A controller, the temperature probe is electrically connected with the phase adjuster through the controller, 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 L-shaped antenna, so as to realize the advantage heating of different space points inside the microwave oven body.

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

[0027] 1) The structure is simple, convenient to install, so that the antenna can maintain stable performance in a wider frequency range, and optimize the S parameter of the antenna, thereby improving the return loss and efficiency of the antenna, improving the performance of the microwave heating technology, and applying the L-shaped antenna to the microwave oven to realize high heating efficiency of the microwave oven and controllable temperature of each point inside, not only realizing differentiated control of the temperature of each point inside the microwave oven, but also making diversified food materials be uniformly heated;

[0028] 2) The first radiation branch and the second radiation branch jointly control the frequency of the antenna and affect the S parameter 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 with the high-power terminal to form a Monopole type antenna, the high-power terminal is used to transmit the input electric power to the L-shaped radiation branch, so as to excite the radiation field of the antenna, and 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 feed system can be realized, good impedance matching can reduce the reflection of signals and reduce the value of S11 (input reflection coefficient), thereby improving the return loss and efficiency of the antenna, thereby ensuring the stable performance and high efficiency of the antenna in the application of microwave heating technology and the like;

[0029] The L-shaped antenna is used as a radiation element of the microwave oven, is responsible for converting the input power into an effective radiation field, so that the microwave oven has high heating efficiency and controllable temperature of each point inside, has high heating efficiency and controllable temperature of each point inside, and realizes that diversified food materials can be uniformly heated;

[0030] 3) The utility model also provides a microwave oven, apply L type antenna in microwave oven, realized simple structure, convenient installation, high heating efficiency and inside each point temperature controllable advantage, these characteristics make microwave oven can better adapt to the diversified food heating demand, improved heating efficiency and food quality, through the phase difference between adjustment L type antenna, can realize beam direction and beam shape control, utilize wave interference and superposition effect, can focus signal on specific direction to improve the heating effect and reliability of microwave oven inside certain area, so that the uniform heating of different food materials in microwave oven, through the phase difference between adjustment L type antenna, can also realize the control to beam width, through the phase difference between adjustment L type antenna, can realize the narrowing or widening of beam width, adapt to the food heating of different positions and different volumes in microwave oven, in addition, L type antenna passes down radiating electric field, combines phase difference adjustment, can ensure that microwave is evenly distributed in microwave oven cavity, this design avoids the reflection and focusing of microwave in cavity, thereby reduce hot spot and cold spot in the heating process, improve heating uniformity, simultaneously, since microwave can penetrate food more effectively, heating efficiency has also been improved significantly. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A structure diagram of an L-shaped antenna is provided for the utility model;

[0032] Figure 2 Different perspective structure diagrams of an L-shaped antenna are provided for the utility model;

[0033] Figure 3 Different perspective structure diagrams of an L-shaped antenna are provided for the utility model;

[0034] Figure 4 Different perspective structure diagrams of an L-shaped antenna are provided for the utility model;

[0035] Figure 5 A structure diagram of a microwave oven is provided for the utility model;

[0036] Figure 6 A frequency return loss and efficiency diagram of a first L-shaped antenna in a microwave oven is provided for the utility model;

[0037] Figure 7 A frequency return loss and efficiency diagram of a second L-shaped antenna in a microwave oven is provided for the utility model;

[0038] Figure 8 A heating effect diagram of placing 5 pieces of same food materials in different areas in a microwave oven is provided for the utility model;

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

[0040] The preferred embodiments of the utility model will be described in detail below with reference to the drawings.

[0041] As Figures 1-4 shown, the utility model provides a L-shaped antenna, including:

[0042] L-shaped radiation branch 1, the L-shaped radiation branch 1 includes: first radiation branch 3 and second radiation branch 4, first radiation branch 3 with second radiation branch 4 is connected, first radiation branch 3 and second radiation branch 4 respectively with the opposite party common control antenna frequency, and influence the S parameter of antenna;

[0043] High power terminal 2, the L-shaped radiation branch 1 with high power terminal 2 is connected to form the antenna of Monopole form.

[0044] The utility model proposes a kind of L-shaped antenna and microwave oven, its structure is simple, easy to install, so that antenna can keep stable performance in wider frequency range, and optimize the S parameter of antenna, to improve the return loss and efficiency of antenna, improve the performance of microwave heating technology, and L-shaped antenna is applied to microwave oven, realize that microwave oven heating efficiency is high and each point temperature inside is controllable, not only realize the differentiating control each point temperature inside microwave oven, more make the diversified food material can be heated evenly.

[0045] Preferably, the high power terminal 2 comprises: an antenna fixing member 5 connected with the first radiating branch 3 or the second radiating branch 4, a radiating body locking and positioning assembly comprising a radiating body positioning member and a locking assembly, one end of the radiating body positioning member passing through the antenna fixing member 5 and connecting the radiating body positioning member with the antenna fixing member 5 through the locking assembly, the antenna fixing member 5, the radiating body positioning member and the locking assembly together constituting an efficient and stable signal path, ensuring that the microwave signal can be accurately and quickly transmitted to the L-shaped radiating branch 1 and finally radiated into the cavity of the microwave oven body to heat the food; the three components, through their structural design and cooperation with each other, jointly ensure the stability and reliability of the L-shaped radiating branch 1, thereby improving the overall performance and heating efficiency of the microwave oven.

[0046] Preferably, the locking assembly comprises: an anti-skid washer 7 and a first locking member 8, the other end surface of the radiating body positioning member being provided with the first locking member 8 to form a radiating body positioning plane 6, one end of the antenna fixing member 5 being connected with the other end of the antenna transition section 12, the anti-skid washer 7 being arranged between the other end of the antenna fixing member 5 and the first locking member 8; the anti-skid washer 7 prevents loosening between the first locking member 8 and the antenna fixing member 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 comprises a fixed antenna assembly, which comprises a tail pressing piece 9, the inner cavity of the tail pressing piece 9 is provided with an insulator piece 10, one end of the antenna inner conductor rod 11 is provided in the insulator piece 10, and the other end of the antenna inner conductor rod 11 is connected with the antenna transition section 12; the tail pressing piece 9 serves as a part of the fixed antenna assembly, supports and fixes the antenna inner conductor rod 11 through the insulator piece 10 in its inner cavity, which ensures the stability of the antenna in the electronic device and prevents displacement or damage caused by vibration or external interference; the insulator piece 10 is arranged in the inner cavity of the tail pressing piece 9 to electrically isolate the antenna inner conductor rod 11 from the tail pressing piece 9, which helps to prevent electrical short circuit or signal interference and ensures the normal electrical performance of the antenna; the antenna inner conductor rod 11 serves as the main part of the antenna, responsible for transmitting and receiving electromagnetic wave signals, and its other end is connected with the antenna transition section 12, which serves to match and connect the antenna inner conductor rod 11 with the internal circuit of the electronic device, which ensures 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, which can be easily installed or disassembled through simple connection and disconnection operations, facilitating regular inspection and maintenance of the antenna.

[0048] Preferably, the fixed antenna assembly further comprises a positioning antenna piece plane 13, which is sleeved with a second locking piece 14, the outer side wall of the second locking piece 14 is provided with a fastening thread, and one end of the tail pressing piece 9 is connected with the other end of the positioning antenna piece plane 13; the positioning antenna piece plane 13 and the second locking piece 14 in the fixed antenna assembly play the roles of positioning and fixing the antenna, enhancing the connection strength and stability, and facilitating installation and maintenance in the microwave oven.

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

[0050] Preferably, the feed ground assembly comprises: a terminal female head blocking piece 19, one end of the first feed ground piece 17 is connected with the other end of the terminal female head blocking piece 19 through the second transition section 18; the design of the second transition section 18 makes the connection between the first feed ground piece 17 and the terminal female head blocking piece 19 more stable; the terminal female head blocking piece 19 is connected by the upper groove of the terminal male head snap ring and the lower edge of the terminal male head snap ring; through reasonable transition structure, it can reduce the risk of loose or broken connection caused by improper connection or vibration and other factors; stable connection not only helps to maintain the integrity of the signal, but also reduces the loss of the signal in the transmission process; this helps to ensure that the microwave signal can be efficiently transmitted into the cavity of the microwave oven body, improving the heating efficiency.

[0051] Preferably, the feed ground assembly comprises: a second feed ground piece 21, one end of the terminal female head blocking piece 19 is connected with the second feed ground piece 21 through the 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 head blocking piece 19 to the second feed ground piece 21; this design avoids interruption or loss of signal during transmission, ensuring the integrity of the signal; the design of the third transition section 20 not only considers the needs of signal transmission, but also focuses on the stability of the connection; through reasonable structural design and material selection, it can ensure that the connection between the terminal female head blocking piece 19 and the second feed ground piece 21 has sufficient strength and can withstand the vibration and impact force generated during the operation of the microwave oven.

[0052] As Figures 1-4The utility model provides a kind of L-type antenna, comprising: L-shaped radiating branch 1, the L-shaped radiating branch 1 includes: first radiating branch 3 and second radiating branch 4, the first radiating branch 3 is connected with the second radiating branch 4, the first radiating branch 3 and the second radiating branch 4 are respectively with opposite party common control antenna frequency, and affect the S parameter of antenna, the antenna fixing piece 5 is connected with the second radiating branch 4, one end of the radiating main body positioning piece passes through the antenna fixing piece 5 and is connected with the antenna fixing piece 5 by the locking assembly, the other end surface of the radiating main body positioning piece is located in the first locking piece 8 to form radiating main body positioning plane 6, one end of the antenna fixing piece 5 is connected with the other end of antenna transition section 12, the anti-skid gasket 7 is arranged between the other end of the antenna fixing piece 5 and the first locking piece 8, the inner cavity of tail pressing piece 9 is equipped with insulator 10, one end of antenna inner conductor rod 11 is arranged in the insulator 10, one end of the antenna transition section 12 is connected with the other end of antenna inner conductor rod 11, the positioning antenna piece plane 13 is equipped with second locking piece 14, the outer side wall of second locking piece 14 is equipped with fastening thread, one end of tail pressing piece 9 is connected with the other end of the positioning antenna piece plane 13, one end of the positioning antenna piece plane 13 is connected with the other end of terminal female head limiting column 15, one end of terminal female head limiting column 15 is connected with the other end of the first feed ground piece 17 through first transition section 16, one end of the first feed ground piece 17 is connected with the other end of terminal female head clamping piece 19 through second transition section 18, one end of terminal female head clamping piece 19 is connected with the second feed ground piece 21 through third transition section 20, form Monopole form antenna;L-shaped radiating branch 1 is composed of first radiating branch 3 and second radiating branch 4, and they commonly control the frequency of antenna, and affect the S parameter (scattering parameter) of antenna, so as to optimize the frequency response and bandwidth of antenna;This design makes the antenna can realize efficient energy radiation and reception in specific frequency band, applicable to various wireless communication applications;

[0053] Monopole antenna has relatively high radiation efficiency, can reduce energy loss and reflection, so as to improve the overall performance of antenna;The L-type antenna of the utility model is further optimized in radiation efficiency through accurate design and adjustment, and is applicable to wireless communication scenarios requiring efficient energy transmission.

[0054] As Figure 5As shown, the utility model also provides a microwave oven, as any one of the above L type antenna, the L type antenna is equipped with at least two, the L type antenna is used for emitting microwave signal, the L type antenna is installed on the top of microwave oven body 22 through fixed antenna assembly, the L type antenna and microwave oven body 22 one end surface form coupling connection, to produce downward radiating electric field, by adjusting the phase difference between the L type antenna to realize the control of beam direction, beam shape and beam width, input power enters high power terminal 2 by feed line, radiates out by L-shaped radiating branch 1;

[0055] Preferably, comprising:

[0056] Phase adjuster (not shown) for adjusting the phase difference between the first L type antenna 23 and the second L type antenna 24;

[0057] Temperature probe (not shown) for real-time acquisition of temperature data inside the microwave oven body 22;

[0058] Controller (not shown), the temperature probe (not shown) is electrically connected with 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 type antenna 23 and the second L type antenna 24 according to the temperature data received inside the microwave oven body 22, so as to realize the dominant heating of different spatial points inside the microwave oven body 22;

[0059] By adjusting the phase difference between the first L type antenna 23 and the second L type antenna 24, the control of beam direction and beam shape can be realized, and by using the interference and superposition effect of waves, the signal can be focused in a specific direction, so as to improve the heating effect and reliability of a certain area inside the microwave oven, so that different food materials inside the microwave oven can be uniformly heated, and by adjusting the phase difference between the first L type antenna 23 and the second L type antenna 24, the control of beam width can also be realized, and by adjusting the phase difference between the first L type antenna 23 and the second L type antenna 24, the beam width can be narrowed or widened, so as to adapt to the heating of food of different positions and different volumes inside the microwave oven;In addition, the L type antenna radiates electric field downward, and combined with the phase difference adjustment, the microwave can be uniformly distributed in the microwave oven cavity, so that the reflection and focusing of the microwave in the cavity are avoided, so that the hot spots and cold spots in the heating process are reduced, the heating uniformity is improved, and the heating efficiency is also significantly improved because the microwave can penetrate the food more effectively;

[0060] The temperature probe (not shown) collects temperature data inside the microwave oven body 22 in real time, and the controller is configured 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 received temperature data inside the microwave oven body 22, and by changing the phase, the heating effect of the high-temperature area inside the microwave oven body 22 is weakened in real time, and the heating effect of the low-temperature area is enhanced, so that the microwave oven has high heating efficiency and the temperature of each point inside is controllable, so that diversified food materials can be uniformly heated.

[0061] As shown in Figure 6 The utility model provides a first L-shaped antenna 23 in microwave oven's frequency return loss and efficiency diagram, first L-shaped antenna 23 can keep stable performance in wider frequency range, and optimization antenna's S parameter to thereby improve antenna's return loss and efficiency, improve microwave heating technology's performance, first L-shaped antenna 23's parameter is as follows table 1:

[0062] Table 1 first L-shaped antenna's parameter

[0063]

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

[0065] As shown in Figure 7 The utility model provides a second L-shaped antenna 24 in microwave oven's frequency return loss and efficiency diagram, second L-shaped antenna 24 can keep stable performance in wider frequency range, and optimization antenna's S parameter to thereby improve antenna's return loss and efficiency, improve microwave heating technology's performance, second L-shaped antenna 24's parameter is as follows table 2:

[0066]

[0067]

[0068] From table 2, we can see that the radiation capacity, operating frequency range and energy conversion efficiency performance of the second L-shaped antenna 24 are excellent.

[0069] As shown in Figure 8 The utility model provides heating effect diagram of 5 same food materials in different areas in microwave oven, control input power, heating frequency point, heating time, 5 same food materials, position is unchangeable, change first L-shaped antenna 23 and second L-shaped antenna 24's input power's phase, 5 food materials (number ①-⑤) temperature is as follows table 3.

[0070] Table 3 heating data of 5 same food materials in different areas in 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 5 pieces of food in different areas, and the temperature of each point in the microwave oven is realized.

[0073] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all the changes or equivalent replacements falling within the scope of the claims of the present application. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all the embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. An L-shaped antenna, characterized by, The L-shaped antenna comprises: an L-shaped radiating branch, which comprises a first radiating branch and a second radiating branch, the first radiating branch is connected with the second radiating branch, the first radiating branch and the second radiating branch control the antenna frequency together and affect the S parameter of the antenna; a high-power terminal, the L-shaped radiating branch is electrically connected with the high-power terminal to form an antenna in the form of Monopole.

2. The L-type antenna according to claim 1, characterized in that The antenna fixing part is connected with the first radiating branch or the second radiating branch, the high-power terminal comprises a radiating body locking and positioning assembly, the radiating body locking and positioning assembly comprises a radiating body positioning part and a locking assembly, one end of the radiating body positioning part passes through the antenna fixing part and connects the radiating body positioning part with the antenna fixing part through the locking assembly. The locking assembly comprises an anti-skid washer and a first locking part, the other end of the radiating body positioning part is provided outside the first locking part to form a radiating body positioning plane, one end of the antenna fixing part is connected with the other end of an antenna transition section, and the anti-skid washer is arranged between the other end of the antenna fixing part and the first locking part.

3. The L-type antenna according to claim 2, wherein The high-power terminal comprises a fixed antenna assembly, the fixed antenna assembly comprises a tail pressing part, an inner cavity of the tail pressing part is provided with an insulator part, one end of an antenna inner conductor rod is arranged in the insulator part, and one end of the antenna transition section is connected with the other end of the antenna inner conductor rod.

4. The L-type antenna according to claim 3, wherein The fixed antenna assembly further comprises a positioning antenna part plane, the positioning antenna part plane is provided with a second locking part, an outer side wall of the second locking part is provided with a fastening thread, and one end of the tail pressing part is connected with the other end of the positioning antenna part plane.

5. The L-type antenna according to claim 4, wherein The high-power terminal comprises a feed ground assembly, the feed ground assembly comprises a terminal female head limiting column and a first feed ground part, one end of the positioning antenna part plane is connected with the other end of the terminal female head limiting column, and one end of the terminal female head limiting column is connected with the other end of the first feed ground part through a first transition section.

6. The L-type antenna according to claim 5, wherein The feed ground assembly comprises a terminal female head clamping part, one end of the first feed ground part is connected with the other end of the terminal female head clamping part through a second transition section.

7. The L-type antenna according to claim 6, wherein The feed ground assembly comprises a second feed ground part, one end of the terminal female head clamping part is connected with the second feed ground part through a third transition section.

8. The L-type antenna according to claim 7, wherein The L-shaped antenna and the microwave oven body as claimed in any one of claims 1-8 are provided with at least two L-shaped antennas, the L-shaped antennas are installed on the top of the microwave oven body through the fixed antenna assembly, a coupling connection is formed between the L-shaped antennas and one end surface of the microwave oven body to generate a downward radiation electric field, and the beam direction, the beam shape and the beam width are controlled by adjusting the phase difference between the L-shaped antennas.

9. A microwave oven, characterized by comprising: The phase adjuster is used for adjusting the phase difference between the L-shaped antennas; The temperature probe is used for collecting temperature data inside the microwave oven body in real time.

10. The microwave oven as claimed in claim 9, wherein ​ ​ ​ A controller, the temperature probe is electrically connected with the phase adjuster through the controller, 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 L-shaped antennas, so as to realize the dominant heating of different space points inside the microwave oven body.

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