CN111613880A - Antenna structures and electronics - Google Patents

Abstract

The present application discloses an antenna structure and electronic equipment, belonging to the technical field of communications. The antenna structure includes: an antenna body, including an antenna feed point and a first antenna node, and a first distance between the first antenna node and the antenna feed point is equal to The center frequency point of the first suppression frequency band of the antenna structure is matched; the first phase modulation arm, the first end of the first phase modulation arm is connected with the first antenna node; the adjustable variable container, the adjustable variable container is connected with the first phase modulation arm. The second end is connected, wherein the adjustable varactor is used to adjust the center frequency point of the first suppression frequency band to the center frequency point of the first target suppression frequency band when the first preset electrical signal is obtained. When the arm obtains a resonance frequency that conforms to the center frequency point of the first target suppression frequency band, the current phase of the first phase modulation arm is opposite to the current phase of the antenna body. The embodiments of the present application can improve the wave suppression effect when multiple wireless communication frequency bands work simultaneously.

Description

Antenna structures and electronics

technical field

The present application belongs to the field of communication technologies, and in particular relates to an antenna structure and an electronic device.

Background technique

With the rapid development of terminal technology, more and more wireless communication frequency bands are covered by smart terminals. When working in multiple wireless communication frequency bands at the same time, the harmonics of one frequency band interfere with another frequency band, especially the secondary frequency closest to the fundamental frequency. For harmonics, highly selective filtering is required to effectively suppress the second harmonic while maintaining the RF performance in the fundamental frequency band.

In the related art, a notch structure constructed with an inductor and a capacitor is usually arranged on the RF path, or a filter is mounted. Among them, the selectivity of the inductor in the chip filter is not high, and the single-stage suppression of the second harmonic is not ideal, and the central value of the suppression frequency point is difficult to control due to the poor consistency of the device values of the inductor and the capacitor. When the multi-level structure is arranged, the insertion loss in the fundamental frequency band will obviously be too large, and also due to the poor consistency of the device values of the inductor and the capacitor, the suppression frequency points at all levels are inconsistent, and the overall harmonic suppression effect will not be significantly improved.

It can be seen that in the related art, when multiple wireless communication frequency bands work simultaneously, the harmonic suppression effect is poor.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide an antenna structure and an electronic device, which can solve the problem of poor harmonic suppression effect when multiple wireless communication frequency bands work simultaneously.

In order to solve the above technical problems, this application is implemented as follows:

In a first aspect, an embodiment of the present application provides an antenna structure, including:

an antenna body, including an antenna feed point and a first antenna node, and a first distance between the first antenna node and the antenna feed point matches the center frequency point of the first suppression frequency band of the antenna structure;

a first phase modulation arm, the first end of the first phase modulation arm is connected to the first antenna node;

an adjustable variable vessel, the adjustable variable vessel is connected to the second end of the first phase modulation arm, wherein the adjustable variable vessel is used to convert all the The first suppression frequency band center frequency point is adjusted to the first target suppression frequency band center frequency point, and the The current phase of a phase modulation arm is opposite to the current phase of the antenna body.

In a second aspect, an embodiment of the present application provides an electronic device, where the electronic device includes the antenna structure of the first aspect.

In the embodiment of the present application, it is possible to adjust the center frequency point of the suppression frequency band of the phase modulation arm through the adjustable variable capacitor, and the resonant frequency that conforms to the center frequency point of the suppression frequency band can be reversely suppressed through the phase modulation arm. In this way, By adjusting the capacitance value of the varactor, the center frequency of the suppression frequency band of the phase modulation arm can be changed, that is, the resonant frequency suppressed by the phase modulation arm can be changed. Consistency, when working in multiple wireless communication frequency bands at the same time, it can suppress the interference of harmonics of one working frequency to another working frequency.

Description of drawings

FIG. 1 is one of the structural diagrams of an antenna structure provided by an embodiment of the present application;

FIG. 2 is a second structural diagram of an antenna structure provided by an embodiment of the present application;

FIG. 3 a is a current pattern of the antenna structure shown in FIG. 2 in a first working state;

Fig. 3b is the current pattern diagram of the antenna structure shown in Fig. 2 in the second working state;

FIG. 4 is a third structural diagram of an antenna structure provided by an embodiment of the present application;

FIG. 5 is a fourth structural diagram of an antenna structure provided by an embodiment of the present application;

FIG. 6 is a fifth structural diagram of an antenna structure provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and distinguish between "first", "second", etc. The objects are usually of one type, and the number of objects is not limited. For example, the first object may be one or more than one. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

The antenna structure provided by the embodiments of the present application will be described in detail below through specific embodiments and application scenarios with reference to the accompanying drawings.

Please refer to FIG. 1 , which is one of the structural diagrams of the antenna structure provided by the embodiment of the present application. As shown in FIG. 1 , the antenna structure provided by the embodiment of the present application includes: an antenna body 1 , a first phase modulation arm 2 , and an adjustable variable container 3 .

The antenna body 1 includes an antenna feed point 11 and a first antenna node 12, and the first distance between the first antenna node 12 and the antenna feed point 11 matches the center frequency of the first suppression frequency band of the antenna structure; The first end of the first phase modulation arm 2 is connected with the first antenna node 12 ; the adjustable variable container 3 is connected with the second end of the first phase modulation arm 2 .

In operation, the adjustable variable capacitor 3 is used to adjust the center frequency of the first suppression frequency band to the center frequency of the first target suppression frequency band when the first preset electrical signal is obtained, and the first phase modulation When the arm 2 obtains a resonance frequency that conforms to the center frequency point of the first target suppression frequency band, the current phase of the first phase modulation arm 2 is opposite to the current phase of the antenna body 1 .

In a specific implementation, the above-mentioned first phase modulation arm 2 obtains a resonant frequency that conforms to the center frequency of the first target suppression frequency band. The first target suppresses the resonant frequency of the center frequency point of the frequency band. And the above-mentioned first phase modulation arm 2 may include structures such as capacitors and inductors, which can adjust the current phase according to the acquired radiation waves of different frequencies. The current signal in the antenna body 1 is shunted, that is, the current phase in the first phase modulation arm 2 is opposite to the current phase of the antenna body 1, thereby reducing the radiation efficiency of the antenna body 1 for suppressing harmonics; in the first phase modulation arm 2 In the case of receiving non-suppressed harmonics (including fundamental frequency radiation waves that suppress harmonics and working radiation waves of other frequency bands, etc.), the current signal in the antenna body 1 is not shunted, that is, the current phase in the first phase modulation arm 2 The current phase is the same as that of the antenna body 1 so as not to interfere with the radiation efficiency of the unsuppressed harmonics in the antenna body 1 . Specifically, the first phase modulation arm 2 may include at least one of a capacitive element and an inductive element.

It should be noted that, in actual work, the capacitors and inductors in the first phase modulation arm 2 may be affected by the value of the electrical signal, so that the actual structural parameters are different from the rated parameters, thus making the above antenna structure The center frequency of the first suppression band deviates from the center frequency of the first target suppression band of the resonance frequency to be suppressed. In the embodiment of the present application, a variable capacitor 3 is set at the second end of the first phase modulation arm 2, and the variable capacitor 3 is set by adjusting the The capacitance value of the capacitor 3 makes the center frequency point of the first suppression frequency band of the above-mentioned antenna structure match the center frequency point of the first target suppression frequency band, thereby improving the consistency of the suppression frequency band.

In addition, the above-mentioned first preset electrical signal may be a preset voltage signal. In implementation, when the variable capacitor 3 obtains different voltage values, its capacitance value changes. Specifically, the electronic device having the above-mentioned antenna structure provided in the embodiment of the present application has a processor, and the adjustable container 3 and the first radiation arm 2 can be connected to the processor, so that the processor can obtain the information of the first radiation arm 2 phase, and control the electrical signal generation module to generate a first preset electrical signal according to the difference between the phase and the target phase, and transmit it to the adjustable variable capacitor 3 to control the adjustable variable capacitor 3 to adjust the capacitance, so that the first preset electrical signal is generated. The phase of the radiation arm 2 is adjusted to be consistent with the target phase. Wherein, the above-mentioned target phase is determined according to the radiated wave propagating on the antenna body 1, that is, when the radiated wave propagating on the antenna body 1 is to suppress harmonics, the target phase of the first radiating arm 2 is the same as that of the antenna body 1 to suppress the harmonics. The phases of the waves are opposite; when the radiated waves propagating on the antenna body 1 are unsuppressed harmonics, the target phase of the first radiating arm 2 is the same as the phase of the unsuppressed harmonics propagated by the antenna body 1 .

In this embodiment, when the electrical properties of the first phase modulation arm 2 are changed, so that there is a difference between the center frequency point of the first suppression frequency band and the center frequency point of the first target suppression frequency band, it can be adjusted by adjusting the direction The container 3 provides the corresponding voltage, so that the variable capacitor 3 adjusts the device value of the first phase modulation arm 2 to the same value, so as to adjust the center frequency of its suppression frequency band to the center frequency of the first target suppression frequency band, thereby improving the first modulation frequency. Phase arm 2 consistency.

For example: if the center frequency of the resonant frequency that needs to be suppressed of the antenna structure is 3.5GHz, when the first phase-modulating arm 2 flows through the first current value, the center frequency of the suppression frequency is 3.5GHz, and at this time the direction can be adjusted The varactor transmits the first voltage value, so that the center frequency of the suppression frequency of the first phase modulation arm 2 remains unchanged; when the second current value flows through the first phase modulation arm 2, the center frequency of the suppression frequency is 3.6 GHz, at this time, the second voltage value is sent to the adjustable variable capacitor, so that the center frequency point of the suppression frequency of the first phase modulation arm 2 is adjusted from the first phase modulation arm 2 to 3.5 GHz.

In a specific implementation, the first end of the antenna body 1 provided with the antenna feed point 11 and the second end away from the antenna feed point 11 can be connected to the ground end, and the current in the antenna body 1 can be controlled by the first end of the antenna body 1 . The end flows to the second end of the antenna body 1 . And the second end of the variable capacitor 3 is grounded, the current phase of the first phase adjustment arm 2 is opposite to the current phase of the antenna body 1, which can be: the current in the first phase adjustment arm 2 is determined by the first phase adjustment arm. The first end of 2 flows to the adjustable container 3 . At this time, the current in the antenna body 1 flows into the first phase modulation arm 2 through the first antenna node 12 , so that the current on the antenna body 1 is reduced, so that the resonant frequency on the antenna body 1 can be lowered.

In addition, the above-mentioned antenna body 1 may also have a loop antenna structure as shown in FIG. 3 a and FIG. 3 b , and the current in the antenna body 1 may be in a counterclockwise direction. The current phase of the above-mentioned first phase adjustment arm 2 is opposite to the current phase of the antenna body 1, which may be: as shown in FIG. 3a, the current in the first phase adjustment arm 2 flows from the first end of the first phase adjustment arm 2 to the A second end of the phase modulation arm 2 . At this time, the current in the antenna body 1 flows into the first phase modulation arm 2 through the first antenna node 12 , so that the current on the antenna body 1 is reduced, so that the resonant frequency on the antenna body 1 can be lowered.

It should be noted that, in the case where the first phase modulation arm 2 obtains a resonance frequency that does not conform to the center frequency of the first target suppression frequency band, for example, obtains a working frequency (or can be referred to as a fundamental frequency) In this case, as shown in Figure 3b, the current phase of the first phase modulation arm 2 is the same as the current phase of the antenna body 1. Specifically, when the antenna body 1 transmits the working frequency of the electronic device, the working frequency does not conform to the first phase. At the center frequency of a target suppression frequency band, the current phase of the first phase modulation arm 2 is the same as the current phase of the antenna body 1, so that the operating frequency of the electronic device will not be suppressed or interfered with.

In this embodiment, when the fundamental frequency or the channel of the electronic device having the antenna body 1 changes, the capacitance value of the adjustable variable capacitor 3 is adjusted to keep the device value of the first phase modulation arm 2 consistent, so that the The center frequency points of the frequency bands suppressed by the first phase modulation arm 2 are kept consistent, which improves the harmonic suppression efficiency of the antenna structure.

In addition, the above-mentioned first distance between the first antenna node 12 and the antenna feed point 11 matches the center frequency of the first suppression frequency band of the antenna structure, which can be understood as: the first antenna node 12 and the antenna When the electrical length (also referred to as the equivalent length) between the feed points 11 is equal to the above-mentioned first distance, the center frequency of the resonant frequency suppressed by the antenna structure provided by the embodiment of the present application is the center frequency of the first suppression frequency band. point. In practical applications, the center frequency of the first suppression frequency band may be the second harmonic (or even harmonic), the third harmonic (or odd harmonic), etc. of a certain working frequency. The even harmonic or odd harmonic is suppressed, so as to prevent the harmonic from interfering with another operating frequency.

For example, for the loop antenna structure shown in FIG. 2 , if the suppression frequency of the antenna structure is designed to be the second harmonic, when the fundamental frequency works, the first phase modulation arm 2 is connected to the first antenna node 12 of the loop antenna 1 . The electrical length from the antenna feed point 11 is assumed to be a×λ, where λ is the wavelength of the fundamental frequency; during the second harmonic operation, the first antenna node 12 connected between the first phase modulation arm 2 and the loop antenna 1 is far from the antenna The electrical length of the feed point 11 is 2a×λb ₂ ×λb ₂ ×λ×λ. It is assumed that the equivalent electrical length of the first phase modulation arm 2 at the fundamental frequency is b ₁ ×λ, and the equivalent electrical length at the second harmonic is b ₂ ×λ. Reasonable selection of a value, b ₁ value and b ₂ value, so that when the first phase modulation arm 2 is connected, the phase of the first antenna node 12 of the loop antenna 1 does not change when it works at the fundamental frequency, but it works at the second harmonic. When , the phase of the first phase modulation arm 2 is opposite to the phase of the first antenna node 12 of the loop antenna 1 , thereby realizing the suppression of the second harmonic. In order to improve the suppression effect, the first phase modulation arm 2 should be set at the peak corresponding to the second harmonic, that is, the center frequency point of the second harmonic, so that a takes 1/8 or 3/8. Let b ₁ =N, and let b ₂ =M-4×a, where N and M are integers.

It should be noted that, when the suppression frequency of the above-mentioned antenna structure is designed to be the second harmonic, other even harmonics can also be suppressed by the phase modulation arm, which is not specifically limited here.

Of course, the antenna structure can also suppress other harmonics. For example, if the suppression frequency of the antenna structure is designed to be the third harmonic, when the fundamental frequency works, the first antenna node 12 connected to the first phase modulation arm 2 and the loop antenna 1 The electrical length from the antenna feed point 11 is denoted as a×λ; during the third harmonic operation, the electrical length from the first antenna node 12 from the antenna feed point 11 is 3a×λ. It is assumed that the equivalent electrical length of the first phase modulation arm 2 at the fundamental frequency is b ₁ ×λ, and the equivalent electrical length at the third harmonic is b ₂ ×λ. Reasonably select the value of a and the values of b ₁ and b ₂ , so that when the first phase modulation arm 2 is connected, the phase of the first antenna node 12 of the loop antenna 2 does not change when the fundamental frequency works, and when the third harmonic works, the first The phase of the phase modulation arm 2 is opposite to the phase at the first antenna node 12 of the loop antenna 2, so that the third harmonic can be suppressed. In order to improve the suppression effect, the first phase modulation arm 2 should be set at the corresponding peak of the third harmonic (that is, the position corresponding to the center frequency of the third harmonic on the annular sky 1), so that a takes 1/12, 1/ 4 or 5/12, b ₁ =N, and b ₂ =M-6×a, where N and M are integers.

It should be noted that, when the suppression frequency of the above-mentioned antenna structure is designed to be the third harmonic, other odd harmonics can also be suppressed by the phase modulation arm, which is not specifically limited here.

第一天线节点12处原本的相位为

两者恰为同相，相位无变化；二次谐时，该处由第一调相臂2的反射带来的偏转相位为：

形天线2的第一天线节点12处原本的相位为

两者恰为反相，功率相互抵消，从而达到抑制二次谐波的效果。In the following, the design of the suppression frequency of the antenna structure as the second harmonic is taken as an example for specific description: if a=1/8, b ₁ =1, b ₂ =1/2. Then at the first antenna node 12, at the fundamental frequency, the deflection phase caused by the reflection of the first phase modulation arm 2 is:

The original phase at the first antenna node 12 is

The two are exactly in phase, and the phase does not change; at the second harmonic, the deflection phase caused by the reflection of the first phase modulation arm 2 is:

The original phase at the first antenna node 12 of the antenna 2 is

The two are just in opposite phases, and the powers cancel each other out, so as to achieve the effect of suppressing the second harmonic.

As an optional implementation manner, as shown in FIG. 2 , when the antenna body 1 is a loop antenna, the antenna body 1 further includes a second antenna node 13 , and the connection between the second antenna node 13 and the antenna feed point 11 is The second distance is equal to the first distance, and the antenna structure may further include:

The second phase modulation arm 4, the first end of the second phase modulation arm 4 is connected with the second antenna node 13, the second end of the second phase modulation arm 4 is connected with the second end of the variable container 3, and the adjustable The first end of the container 3 is connected with the second end of the first phase adjusting arm 2, wherein the first phase adjusting arm 2 and the second phase adjusting arm 4 are symmetrical along a first symmetry line (as shown in the dotted line A in FIG. 2 ) distribution, the antenna feed point 11 and the adjustable variable container 3 are located on the first symmetry line A.

In this embodiment, the second phase modulation arm 4 cooperates with the first phase modulation arm 2 to suppress the resonant frequency of the loop antenna, which has the same beneficial effect as the antenna structure provided by the embodiment shown in FIG. 1 . , and will not be repeated here.

As an optional implementation manner, as shown in FIG. 2 , the antenna structure further includes: a first switch 5 and a second switch 6 .

The first end of the first switch 5 is connected to the first antenna node 12, the second end of the first switch 5 is connected to the first end of the first phase modulation arm 2; the first end of the second switch 6 is connected to the second The antenna node 13 is connected, and the second end of the second switch 6 is connected to the first end of the second phase modulation arm 4 .

During operation, when the frequency difference between the center frequency point of the first suppression frequency band and the working frequency band of the antenna structure is less than the preset frequency value, the first end of the first switch 5 and the first end of the first switch 5 The second terminal is disconnected, and the first terminal of the second switch 6 and the second terminal of the second switch 6 are disconnected.

In practical applications, there are passive losses on the antenna body 1, the first phase modulation arm 2 and the second phase modulation arm 4, so that the quality factor (also referred to as the Q value) of the antenna structure is low, so that the first phase modulation arm 2 has a passive loss. The notch frequency band formed by the inverse currents on the first phase modulation arm 2 and the second phase modulation arm 4 is wider, so that when the center frequency band of the suppression frequency band is close to the fundamental frequency band, the first phase modulation arm 2 and the second phase modulation arm 4 The phase arm 4 will suppress the fundamental frequency band, thereby reducing the radiation efficiency of the fundamental frequency band. In this embodiment, the first end and the second end of the first switch 5 and the first end and the second end of the second switch 6 can be disconnected under the above circumstances, so as to avoid suppressing the fundamental frequency band, Thereby, the radiation performance of the fundamental frequency band can be improved.

In a specific implementation, the preset frequency value can be determined according to the accuracy of the first phase modulation arm 2, the second phase modulation arm 4 and the adjustable variable container 3 and the application scenario of the antenna structure, so as to ensure that only in the first modulation The phase arm 2, the second phase modulation arm 4 and the adjustable varactor 3 can work without disturbing the fundamental frequency while effectively suppressing the resonant frequency; otherwise, the first switch 5 and the second switch 6 are turned off. one end and the second end.

In this embodiment, when the difference between the resonant frequency and the fundamental frequency is small, the first and second ends of the first switch 5 and the second switch 6 are disconnected, which can avoid the first phase modulation arm 2 and the second The phase-modulating arm 4 and the adjustable variable capacitor 3 suppress the fundamental frequency while suppressing the resonant frequency, thereby improving the antenna performance of the antenna structure provided in the embodiment of the present application.

It should be noted that, when applied to the non-loop structure antenna as shown in FIG. 1 , the antenna structure can only be provided with a first switch between the first phase modulation arm 2 and the first antenna node 12 , and, in the When the frequency difference between the center frequency point of the first suppression frequency band and the working frequency band of the antenna structure is less than the preset frequency value, the first switch is turned off, thereby preventing the phase modulation arm from suppressing the working frequency band.

As an optional implementation manner, as shown in FIG. 4 , the antenna body 1 further includes a third antenna node 14 and a fourth antenna node 15 , and the third distance between the third antenna node 14 and the antenna feed point 11 is the same as the The center frequency point of the second suppression band of the antenna structure is matched, and the fourth distance between the fourth antenna node 15 and the antenna feed point 11 is equal to the third distance;

The first switch 5 and the second switch 6 further include a third terminal, the third terminal of the first switch 5 is connected to the third antenna node 14, and the third terminal of the second switch 6 is connected to the fourth antenna node 15;

Wherein, when the center frequency of the target suppression band of the antenna structure is the center frequency of the first suppression band, the first end of the first switch 5 is connected to the second end of the first switch 5, and the second switch The first end of 6 is connected with the second end of the second switch 6;

When the center frequency of the target suppression band of the antenna structure is the center frequency of the second suppression band, the third end of the first switch 5 is connected to the second end of the first switch 5, and the second end of the second switch 6 is connected. The third end is connected to the second end of the second switch 6, and the variable capacitor 3 is used to adjust the center frequency of the second suppression frequency band to the second target preset when the second preset electrical signal is received. Set the center frequency point of the suppression band, in the case that the first phase modulation arm 2 obtains a resonance frequency that meets the center frequency of the second target suppression band, the current phase of the first phase modulation arm 2 and the current phase of the antenna body 1 on the contrary.

In a specific implementation, when the first end of the first switch 5 is connected to the second end of the first switch 5, and the first end of the second switch 6 is connected to the second end of the second switch 6, the first adjustment The phase arm 2, the second phase modulation arm 4 and the adjustable variable capacitor 3 suppress the resonance frequency of the center frequency point of the first suppression frequency band; the third end of the first switch 5 is connected with the second end of the first switch 5, Under the condition that the third end of the second switch 6 is connected to the second end of the second switch 6, the first phase modulation arm 2, the second phase modulation arm 4 and the adjustable variable capacitor 3 have a negative effect on the center frequency of the second suppression frequency band. Resonant frequency is suppressed.

Among them, the above-mentioned process of suppressing the resonance frequency of the center frequency point of the second suppression frequency band by the first phase modulation arm 2, the second phase modulation arm 4 and the adjustable variable capacitor 3 is the same as that of the first phase modulation arm 2, the second phase modulation arm 2 and the second modulation The process of suppressing the resonant frequency of the center frequency point of the first suppression frequency band by the phase arm 4 and the adjustable variable capacitor 3 has the same distance, the difference is that the center frequency point of the first suppression frequency band is different from the center frequency point of the second suppression frequency band , so that the third distance from the third antenna node 14 and the fourth antenna node 15 to the antenna feed point 11 is different from the first distance from the first antenna node 12 and the second antenna node 13 to the antenna feed point 11 .

In this embodiment, the above-mentioned antenna structure can switch the working state through the first switch 5 and the second switch 6, and the antenna structure can suppress different resonance frequencies in different working states. For example: when the first fundamental frequency and the second fundamental frequency work at the same time, if the second harmonic of the first fundamental frequency can interfere with the second fundamental frequency, the above-mentioned antenna structure can be adjusted to the first fundamental frequency. working state, so that the first phase modulation arm 2, the second phase modulation arm 4 and the adjustable variable capacitor 3 in the first working state can suppress the second harmonic of the first fundamental frequency; When the frequency of the first fundamental frequency and the third fundamental frequency work at the same time, if the third harmonic of the first fundamental frequency can interfere with the third fundamental frequency, the above-mentioned antenna structure can be adjusted to the second working state, so that the second The first phase modulation arm 2, the second phase modulation arm 4 and the adjustable variable capacitor 3 in the working state suppress the third harmonic of the first fundamental frequency.

It should be noted that, when applied to the non-loop structure antenna shown in FIG. 1 , the antenna body 1 further includes a third antenna node, and the third distance between the third antenna node and the antenna feed point 11 is matching with the center frequency point of the second suppression frequency band of the antenna structure;

The first switch further includes a third terminal, the third terminal of the first switch is connected to the third antenna node, and at the same time, the second terminal of the first switch is connected to the third terminal of the first switch. One end and one of the third ends are connected;

Wherein, when the center frequency of the target suppression frequency band of the antenna structure is the center frequency of the first suppression frequency band, the first end of the first switch is connected to the second end of the first switch;

When the center frequency of the target suppression band of the antenna structure is the center frequency of the second suppression band, the third end of the first switch is connected to the second end of the first switch, and the optional The modulation container is used to adjust the center frequency point of the second suppression frequency band to the center frequency point of the second target preset suppression frequency band in the case of receiving the second preset electrical signal, and obtains from the first phase modulation arm When the resonant frequency conforms to the center frequency point of the second target suppression frequency band, the current phase of the first phase modulation arm is opposite to the current phase of the antenna body.

In this embodiment, the switching node of the first switch is added, so that the same antenna structure can suppress harmonics of different frequencies when the first switch is in different switching states, thereby increasing the applicable range of the suppressed frequency of the antenna structure.

The third switch 5 and the fourth switch 6 may be SPDT switches, so that the same antenna structure has different working states, and the antenna structures under different working states can suppress harmonics of different frequencies.

As an optional implementation manner, as shown in FIG. 5 or FIG. 6 , the antenna structure further includes: a coupling resonance module (7 shown in FIG. 5 or 8 shown in FIG. 6 ), the coupling resonance module is connected to the The first phase adjustment arm 2 is coupled with the second phase adjustment arm 4 .

In a specific implementation, in the process of coupling the above-mentioned coupling resonance module with the first phase modulation arm 2 and the second phase modulation arm 4, the device values of the first phase modulation arm 2 and the second phase modulation arm 4 can be adjusted, thereby changing the first phase modulation arm 2 and the second phase modulation arm 4. The phases of the first phase modulation arm 2 and the second phase modulation arm 4 are increased to increase the Q value of the first phase modulation arm 2 and the second phase modulation arm 4 .

In this embodiment, in the process of the first phase adjustment arm 2 and the second phase adjustment arm 4 performing reverse current suppression on harmonics, the first phase adjustment arm 2 and the second phase adjustment arm 4 can be coupled with the first phase adjustment arm 2 and the second phase adjustment arm 4 through the coupling resonance module. The coupling effect between the above-mentioned reverse currents reduces the width of the notch frequency band formed by the above-mentioned reverse current, thereby avoiding the overlap between the notch frequency band and the fundamental frequency band with a small frequency difference, so as to avoid the first phase modulation arm 2 and the second phase modulation arm 2. The phase modulation arm 4 suppresses the fundamental frequency band, which can improve the radiation performance of the fundamental frequency band, so that the radio frequency system adjacent to the suppressed frequency band and the radio frequency system at the fundamental frequency can work normally at the same time.

As an optional implementation manner, as shown in FIG. 5 or FIG. 6 , the coupling resonance module is disposed on the side of the first phase modulation arm 2 and the second phase modulation arm 3 away from the antenna feed point 11 .

In this embodiment, the coupling of the resonant module and the antenna body 1 close to the antenna feed point 11 can be avoided, thereby avoiding interference with the radiation performance of the antenna body 1 .

In one embodiment, as shown in FIG. 5 , the coupled resonant module is a yttrium iron garnet (Yttrium Iron Garnets, YIG) resonant structure 7 .

In this embodiment, the above-mentioned YIG resonant structure 7 is a passive resonant structure, which utilizes the high Q value characteristic of YIG to improve the Q value of the first phase modulation arm 2 and the second phase modulation arm 4 coupled thereto.

In another embodiment, as shown in FIG. 6 , the coupled resonance module includes an active negative resistance 8 .

In this embodiment, the passive loss on the antenna body 1 , the first phase modulation arm 2 and the second phase modulation arm 4 is compensated by the active negative resistance coupled with the first phase modulation arm 2 and the second phase modulation arm 4 , In order to improve the Q value of the first phase modulation arm 2 and the second phase modulation arm 4 .

Optionally, the active negative resistance 8 includes a negative feedback amplifier 81 and a coupled resonance branch 82, the first end of the coupled resonance branch 82 is connected to the first end of the negative feedback amplifier 81, and the second end of the coupled resonance branch 82 is connected to the negative feedback. A second end of amplifier 82 is connected.

In this embodiment, a negative feedback amplifier 81 is set to perform negative feedback according to the passive losses on the antenna body 1 , the first phase modulation arm 2 and the second phase modulation arm 4 , and through the The coupling resonance branch 82 coupled by the two phase modulation arms 4 has an impact on the Q value of the first phase modulation arm 2 and the second phase modulation arm 4. Specifically, the negative feedback electrical signal generated by the negative feedback amplifier 81 is related to the antenna body 1, the The passive losses on the first phase modulation arm 2 and the second phase modulation arm 4 are positively correlated, and under the coupling action of the coupling resonance branch 82, the coupling capacitance value obtained by the first phase modulation arm 2 and the second phase modulation arm 4 Alternatively, the coupled inductance value can compensate for passive losses on the antenna body 1 , the first phase modulation arm 2 and the second phase modulation arm 4 , thereby improving the Q value of the first phase modulation arm 2 and the second phase modulation arm 4 .

The electronic device in this embodiment of the present application may be a mobile electronic device or a non-mobile electronic device. Exemplarily, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (personal digital assistant). assistant, PDA), etc., the non-mobile electronic device may be a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which are not specifically limited in the embodiments of the present application.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of this application, without departing from the scope of protection of the purpose of this application and the claims, many forms can be made, which all fall within the protection of this application.

Claims (10)

1. an antenna structure, is characterized in that, comprises: an antenna body, including an antenna feed point and a first antenna node, and a first distance between the first antenna node and the antenna feed point matches the center frequency point of the first suppression frequency band of the antenna structure; a first phase modulation arm, the first end of the first phase modulation arm is connected to the first antenna node; an adjustable variable vessel, the adjustable variable vessel is connected to the second end of the first phase modulation arm, wherein the adjustable variable vessel is used to convert all the The first suppression frequency band center frequency point is adjusted to the first target suppression frequency band center frequency point, and the The current phase of a phase modulation arm is opposite to the current phase of the antenna body. 2 . The antenna structure according to claim 1 , wherein the antenna body is a loop antenna, and the antenna body further comprises a second antenna node, and a connection between the second antenna node and the antenna feed point is provided. 3 . The second distance is equal to the first distance, and the antenna structure further includes: a second phase modulation arm, the first end of the second phase modulation arm is connected to the second antenna node, the second end of the second phase modulation arm is connected to the second end of the adjustable variable container, The first end of the variable container is connected with the second end of the first phase adjustment arm, wherein the first phase adjustment arm and the second phase adjustment arm are symmetrically distributed along the first symmetry line, so The antenna feed point and the adjustable variable container are located on the first symmetry line. 3. The antenna structure according to claim 1, further comprising: a first switch, the first end of the first switch is connected to the first antenna node, and the second end of the first switch is connected to the first end of the first phase modulation arm; Wherein, when the frequency difference between the center frequency point of the first suppression frequency band and the operating frequency band of the antenna structure is less than a preset frequency value, the first end of the first switch and the first end of the first switch The second end is disconnected. 4 . The antenna structure according to claim 3 , wherein the antenna body further comprises a third antenna node, and a third distance between the third antenna node and the antenna feed point is related to the antenna structure. 5 . The center frequency point of the second suppression band is matched; The first switch further includes a third terminal, the third terminal of the first switch is connected to the third antenna node, and at the same time, the second terminal of the first switch is connected to the third terminal of the first switch. One end and one of the third ends are connected; Wherein, when the center frequency of the target suppression frequency band of the antenna structure is the center frequency of the first suppression frequency band, the first end of the first switch is connected to the second end of the first switch; When the center frequency of the target suppression band of the antenna structure is the center frequency of the second suppression band, the third end of the first switch is connected to the second end of the first switch, and the optional The modulation container is used to adjust the center frequency point of the second suppression frequency band to the center frequency point of the second target preset suppression frequency band in the case of receiving the second preset electrical signal, and obtains from the first phase modulation arm When the resonant frequency conforms to the center frequency point of the second target suppression frequency band, the current phase of the first phase modulation arm is opposite to the current phase of the antenna body. 5 . The antenna structure according to claim 2 , further comprising: a coupling resonance module, wherein the coupling resonance module is coupled with the first phase modulation arm and the second phase modulation arm. 6 . 6 . The antenna structure according to claim 5 , wherein the coupling resonance module is disposed on a side of the first phase modulation arm and the second phase modulation arm away from the antenna feed point. 7 . 7. The antenna structure according to claim 5 or 6, wherein the coupling resonance module comprises a yttrium iron garnet ferrite YIG resonance structure. 8. The antenna structure according to claim 5 or 6, wherein the coupling resonance module comprises an active negative resistance. 9 . The antenna structure according to claim 8 , wherein the active negative resistance comprises a negative feedback amplifier and a coupled resonance branch, and the first end of the coupled resonance branch is connected to the first end of the negative feedback amplifier. 10 . connected, the second end of the coupling resonance branch is connected with the second end of the negative feedback amplifier. 10 . An electronic device, characterized in that, the electronic device comprises the antenna structure according to any one of claims 1 to 9 .

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