Antenna, Low-Frequency Oscillator and Filtering Frequency Band Adjustment Method

Abstract

The present invention relates to an antenna, a low-frequency oscillator and a filtering frequency band adjustment method. Since at least part of the first high-frequency band and the second high-frequency band are staggered, that is, at least part of the first high-frequency band and the second high-frequency band do not overlap, the low-frequency oscillator can filter dual-frequency or multi-frequency, increasing the filtering range of the low-frequency oscillator, enabling the low-frequency oscillator to cooperate with high-frequency oscillators of different frequency bands, making the antenna meet the usage requirements of multiple systems and multiple frequency bands, and the radiation patterns of the high-frequency oscillators in each frequency band will not be distorted, and the radiation performance is good.

Description

Technical Field

[0001] The present invention relates to the field of mobile communication technology, and in particular to an antenna, a low-frequency oscillator and a filtering frequency band adjustment method. Background Art

[0002] With the rapid development of mobile communication technology, the requirements for miniaturization and integration of antennas are becoming increasingly higher, which has led to a continuous decrease in the distance between the high-frequency oscillator and the low-frequency oscillator, resulting in nesting and stacking between the high-frequency oscillator and the low-frequency oscillator, which in turn leads to mutual coupling problems between the high-frequency oscillator and the low-frequency oscillator, causing the radiation pattern of the high-frequency oscillator to be distorted. Summary of the invention

[0003] Based on this, it is necessary to provide an antenna, a low-frequency oscillator and a filter frequency band adjustment method to address the problem of distortion of the directional pattern of the high-frequency oscillator.

[0004] The technical solution is as follows:

[0005] In one aspect, a low-frequency vibrator is provided, comprising:

[0006] Two groups of folded dipoles with orthogonal polarizations, each group of the folded dipoles comprises two first radiating arms arranged opposite to each other, at least one of the first radiating arms is provided with a first filtering part for filtering electromagnetic waves in a first high frequency band; and

[0007] a first filter branch, one end of which is electrically connected to the first radiation arm, and the first filter branch is used to filter electromagnetic waves in a second high frequency band;

[0008] Wherein, the first high frequency band and the second high frequency band are at least partially staggered.

[0009] The technical solution is further described below:

[0010] In one embodiment, the low-frequency vibrator includes a supporting body and a feeding balun, the supporting body is provided with a first side surface and a second side surface which are arranged opposite to each other, the two groups of the folded vibrators are arranged on the first side surface, the feeding balun is arranged on the side where the second side surface is located, and the feeding balun is used to feed the two groups of the folded vibrators.

[0011] In one embodiment, the low-frequency oscillator further includes four second radiating arms, the four second radiating arms are all arranged on the second side, the four second radiating arms correspond to the four first radiating arms one by one and are coupled, and the four second radiating arms are all spaced apart from the feeding balun.

[0012] In one embodiment, at least one of the second radiation arms is provided with a second filtering portion for filtering electromagnetic waves in a third high-frequency band, wherein the third high-frequency band is at least partially staggered from the first high-frequency band and the second high-frequency band.

[0013] In one embodiment, the low-frequency oscillator further includes a second filtering stub. One end of the second filtering stub is electrically connected to the second radiation arm. The second filtering stub is used for filtering electromagnetic waves in a fourth high-frequency band, wherein the fourth high-frequency band is at least partially staggered from the first high-frequency band and the second high-frequency band.

[0014] In one embodiment, the feeding balun includes two feeding elements arranged orthogonally. Each feeding element is provided with two feeding portions for respectively feeding two of the first radiation arms in the same set of folded oscillators, and two adjacent first radiation arms share one feeding portion.

[0015] In one embodiment, the first radiation arm includes a first extension portion extending outward and a second extension portion connected to the first extension portion and extending toward both sides of the first extension portion; the first filtering portion is provided on the first extension portion and / or the second extension portion; the first filtering stub is correspondingly provided on the first extension portion and / or the second extension portion.

[0016] In one embodiment, the first extension portion is provided with a first hollowed-out groove, and the second extension portion is provided with a second hollowed-out groove. The second hollowed-out groove communicates with the first hollowed-out groove to form a hollowed-out cavity for adjusting impedance matching.

[0017] In one embodiment, the line width of the first extension portion and the second extension portion is D, and the sum of the lengths of the extension trajectories of the first extension portion and the second extension portion is L, wherein D < 0.01λ, 0.9λ ≤ L ≤ 1.1λ, and λ is the wavelength of the center frequency point.

[0018] In one embodiment, the first filtering portion includes at least two straight line segments extending in a broken line or extending in a reciprocating bent manner; or the first filtering portion includes at least two curved line segments arranged at an angle; or the first filtering portion includes at least two straight line segments and at least two curved line segments, and the straight line segments and the curved line segments are alternately arranged and connected to each other.

[0019] In one embodiment, the first filtering stub includes a first filtering segment and a second filtering segment. The first filtering segment is arranged at an angle with the first radiation arm, and the second filtering segment is spaced from and parallel to the first radiation arm. Both ends of the first filtering segment are electrically connected to the second filtering segment and the first radiation arm respectively.

[0020] On the other hand, an antenna is provided, comprising the low-frequency vibrator.

[0021] On the other hand, a method for adjusting the filter frequency band applied to the low-frequency oscillator is provided, which adjusts the filter frequency band by adjusting the extended track length of the first filter part and / or adjusting the extended track length of the first filter branch.

[0022] The antenna, low-frequency oscillator and filtering frequency band adjustment method of the above-mentioned embodiment, since the first high-frequency band and the second high-frequency band are at least partially staggered, that is, the first high-frequency band and the second high-frequency band at least partially do not overlap, thereby enabling the low-frequency oscillator to filter dual-frequency or multi-frequency, thereby increasing the filtering range of the low-frequency oscillator, allowing the low-frequency oscillator to be used in conjunction with high-frequency oscillators of different frequency bands, so that the antenna meets the requirements of multi-standard and multi-frequency band use, and the directional patterns of the high-frequency oscillators of each frequency band will not be distorted, and the radiation performance is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a schematic structural diagram of an antenna according to an embodiment;

[0026] Figure 2 for Figure 1 A structural schematic diagram of an embodiment of a first side surface of a support body of a low-frequency oscillator of an antenna;

[0027] Figure 3 for Figure 1 A schematic structural diagram of a second side surface of a support body of a low-frequency oscillator of an antenna;

[0028] Figure 4 for Figure 1 A structural schematic diagram of another embodiment of a first side surface of a support body of a low-frequency oscillator of an antenna;

[0029] Figure 5 for Figure 1 A schematic structural diagram of one side of a feeding element of a low-frequency oscillator of an antenna;

[0030] Figure 6For Figure 1 Schematic diagram of the structure of the other side of the feeding element of the low-frequency oscillator of the antenna;

[0031] Figure 7 For the horizontal radiation pattern of the traditional high-frequency oscillator;

[0032] Figure 8 For Figure 1 The horizontal radiation pattern of the high-frequency oscillator of the antenna;

[0033] Figure 9 For Figure 1 The gain comparison diagram between the low-frequency oscillator of the antenna and the traditional low-frequency oscillator.

[0034] Explanation of the reference numerals:

[0035] 10. Low-frequency oscillator; 100, 100a, 100b, 100c, 100d, First radiation arm; 101, First extension; 1011, First hollow slot; 102, Second extension; 1021, Second hollow slot; 110, First filtering part; 120, First filtering branch; 121, First filtering section; 122, Second filtering section; 130, Support body; 140, Feeding balun; 141, Feeding element; 142, Feeding microstrip line; 143, Metal grounding microstrip line; 1431, Feeding section; 200, Second radiation arm; 210, Second filtering part; 220, Second filtering branch; 20. High-frequency oscillator. Detailed implementation manners

[0036] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] As Figure 1 shown, in one embodiment, an antenna is provided, including a low-frequency oscillator 10. Of course, in actual use, the antenna may further include a high-frequency oscillator 20, so that the antenna has the performance of multiple systems and multiple frequency bands to meet the usage requirements.

[0038] Among them, the high-frequency oscillator 20 and the low-frequency oscillator 10 can be arranged on the same reflector in a nested form or a stacked form.

[0039] As Figure 7As shown, when mutual coupling occurs between the high-frequency oscillator 20 and the low-frequency oscillator 10, and the electromagnetic wave radiated by the high-frequency oscillator 20 irradiates the traditional low-frequency oscillator 10, an induced current will be generated on the low-frequency oscillator 10, resulting in distortion of the radiation pattern of the high-frequency oscillator 20.

[0040] In one embodiment, a low-frequency oscillator 10 is provided, which can filter the electromagnetic wave radiated by the high-frequency oscillator 20, thereby solving the mutual coupling problem between the high-frequency oscillator 20 and the low-frequency oscillator 10, and avoiding distortion of the radiation pattern of the high-frequency oscillator 20.

[0041] Specifically, the low-frequency oscillator 10 includes a first filtering stub 120 and two sets of folded dipoles with orthogonal polarizations.

[0042] As Figure 2 and Figure 4 shown, each set of folded dipoles includes two oppositely arranged first radiation arms 100. And, at least one first radiation arm 100 is provided with a first filtering portion 110, so as to be able to use the first filtering portion 110 to filter the electromagnetic wave in the first high-frequency band, thereby avoiding mutual coupling between the high-frequency oscillator 20 that emits the electromagnetic wave in the first high-frequency band and the low-frequency oscillator 10, and ensuring that the radiation pattern of the high-frequency oscillator 20 that emits the electromagnetic wave in the first high-frequency band does not undergo distortion. Moreover, the gain of the low-frequency oscillator 10 can be improved.

[0043] Among them, the first filtering portion 110 filters the electromagnetic wave in the first high-frequency band, which means that the first filtering portion 100 can suppress the high-frequency current generated by the coupling of the electromagnetic wave in the first high-frequency band on the low-frequency oscillator 10, so as to achieve the purpose of ensuring that the radiation pattern of the high-frequency oscillator 20 that emits the electromagnetic wave in the first high-frequency band does not undergo distortion.

[0044] As Figure 2 and Figure 4 shown, the first radiation arm 100a and the first radiation arm 100c form a set of folded dipoles, and the first radiation arm 100b and the first radiation arm 100d form another set of folded dipoles.

[0045] Among them, one end of the first filtering stub 120 is electrically connected to the first radiation arm 100. And, the first filtering stub 120 is used to filter the electromagnetic wave in the second high-frequency band, thereby avoiding mutual coupling between the high-frequency oscillator 20 that emits the electromagnetic wave in the second high-frequency band and the low-frequency oscillator 10, and ensuring that the radiation pattern of the high-frequency oscillator 20 that emits the electromagnetic wave in the second high-frequency band does not undergo distortion. Moreover, the gain of the low-frequency oscillator 10 can be improved.

[0046] Among them, the first filtering stub 120 filters the electromagnetic waves in the second high-frequency band, which means that the first filtering stub 120 can suppress the coupling of the electromagnetic waves in the second high-frequency band to generate high-frequency current on the low-frequency oscillator 10, so as to ensure that the radiation pattern of the high-frequency oscillator 20 emitting the electromagnetic waves in the second high-frequency band does not distort.

[0047] As Figure 8 shown, in addition, since the first high-frequency band and the second high-frequency band are at least partially staggered, that is, at least part of the first high-frequency band and the second high-frequency band do not overlap, so that the low-frequency oscillator 10 can filter dual-frequency or multi-frequency, increasing the filtering range of the low-frequency oscillator 10, enabling the low-frequency oscillator 10 to cooperate with high-frequency oscillators 20 of different frequency bands, making the antenna meet the usage requirements of multiple systems and multiple frequency bands, and the radiation patterns of the high-frequency oscillators 20 in each frequency band will not distort, and the radiation performance is good.

[0048] Among them, the first high-frequency band and the second high-frequency band can be flexibly designed or adjusted according to actual usage requirements.

[0049] At the same time, when the first high-frequency band and the second high-frequency band change, the filtering frequency band can also be adjusted accordingly by adjusting the length of the extension trajectory of the first filtering part 110 and / or adjusting the length of the extension trajectory of the first filtering stub 120, so that the antenna meets the usage requirements of multiple systems and multiple frequency bands, and the radiation patterns of the high-frequency oscillators 20 in each frequency band will not distort, and the radiation performance is good. For example, when the length of the extension trajectory of the first filtering stub 120 is extended, the filtering frequency band can be shifted to a lower frequency; when the length of the extension trajectory of the first filtering part 110 is extended, the filtering frequency band can also be shifted to a lower frequency; when the length of the extension trajectory of the first filtering stub 120 is shortened, the filtering frequency band can be shifted to a higher frequency; when the length of the extension trajectory of the first filtering part 110 is shortened, the filtering frequency band can also be shifted to a higher frequency.

[0050] As Figure 1 shown, in addition, the low-frequency oscillator 10 further includes a support 130 and a feeding balun 140.

[0051] Among them, the support 130 can be made of dielectric materials such as FR4 and is used to support the first radiation arm 100. The support 130 can be plate-shaped or sheet-shaped.

[0052] Specifically, the support 130 is provided with a first side surface and a second side surface that are oppositely arranged. Among them, the two sets of folded oscillators are both fixed on the first side surface by electroplating or other means; the feeding balun 140 is arranged on the side where the second side surface of the support 130 is located, and the support 130 is supported by the feeding balun 140. And the two sets of folded oscillators are fed by the feeding balun 140.

[0053] It should be noted that the feeding balun 140 can be an existing feeding structure, as long as it can feed the two folded dipoles, and no limitation is made here.

[0054] As Figure 5 and Figure 6 shown, optionally, the feeding balun 140 includes two feeding elements 141 arranged orthogonally and in plug-in fit. Each feeding element 141 is provided with two feeding parts 1431, and the two feeding parts 1431 are used to feed the two first radiation arms 100 in a group of folded dipoles respectively. Moreover, among different groups of folded dipoles, two adjacent first radiation arms 100 share one feeding part 1431.

[0055] As Figure 5 and Figure 6 shown, more specifically, a feeding microstrip line 142 for electrically connecting with the feeding network is arranged on one side surface of the feeding element 141, and two relatively spaced metal grounding microstrip lines 143 are arranged on the other side surface of the feeding element 141. The two metal grounding microstrip lines 143 are both in coupling fit with the feeding microstrip line 142. The upper end of each metal grounding microstrip line 143 is provided with a feeding part 1431, and the lower end of each grounding microstrip line is welded to the ground plane for grounding.

[0056] In addition, in order to increase the working bandwidth of the low-frequency oscillator 10.

[0057] As Figure 3 shown, optionally, the low-frequency oscillator 10 further includes four second radiation arms 200. Among them, the second radiation arms 200 can be in strip, sheet or microstrip line structures, etc., and can be made of metals such as copper and aluminum.

[0058] Among them, the four second radiation arms 200 are all arranged on the second side surface by means of electroplating, etc. Moreover, the four second radiation arms 200 are in one-to-one correspondence and coupling arrangement with the four first radiation arms 100, so that the four second radiation arms 200 can also transmit and radiate signals, enhancing the working bandwidth of the low-frequency oscillator 10.

[0059] Moreover, the four second radiation arms 200 are all arranged at intervals from the feeding balun 140.

[0060] Specifically, the support body 130 is provided with a jack penetrating through the first side surface and the second side surface. The feeding part 1431 includes a protrusion in plug-in fit with the jack. The protrusion is welded to the corresponding first radiation arm 100 for electrical contact, and the protrusion is arranged at intervals from the corresponding second radiation arm 200, so as to avoid problems such as resonance caused by the virtual connection between the second radiation arm 200 and the metal grounding microstrip line 143.

[0061] Among them, the four second radiation arms 200 are correspondingly and coupled with the four first radiation arms 100 one by one. It can be that the projection of each first radiation arm 100 overlaps with a second radiation arm 200.

[0062] As Figure 3 shown, optionally, at least one second radiation arm 200 is provided with a second filtering part 210 for filtering electromagnetic waves in the third high-frequency band, so that the second filtering part 210 can be used to filter the electromagnetic waves in the third high-frequency band, thereby avoiding the mutual coupling between the high-frequency oscillator 20 emitting electromagnetic waves in the third high-frequency band and the low-frequency oscillator 10, and ensuring that the radiation pattern of the high-frequency oscillator 20 emitting electromagnetic waves in the third high-frequency band does not distort.

[0063] Among them, the second filtering part 210 filtering the electromagnetic waves in the third high-frequency band means that the second filtering part 210 can suppress the high-frequency current generated by the coupling of the electromagnetic waves in the third high-frequency band on the low-frequency oscillator 10, so as to achieve the purpose of ensuring that the radiation pattern of the high-frequency oscillator 20 emitting electromagnetic waves in the third high-frequency band does not distort.

[0064] Moreover, the third high-frequency band is at least partially staggered from the first high-frequency band and the second high-frequency band, that is, the third high-frequency band and the first high-frequency band and the second high-frequency band have at least partial non-overlap, so that the low-frequency oscillator 10 can filter multiple frequencies, further increasing the filtering range of the low-frequency oscillator 10, enabling the low-frequency oscillator 10 to cooperate with high-frequency oscillators 20 in different frequency bands, making the antenna meet the usage requirements of multiple systems and multiple frequency bands, and the radiation patterns of the high-frequency oscillators 20 in each frequency band do not distort, and the radiation performance is good.

[0065] It can be as Figure 3 shown, optionally, the low-frequency oscillator 10 further includes a second filtering stub 220. Among them, one end of the second filtering stub 220 is electrically connected to the second radiation arm 200, and the second filtering stub 220 is used to filter electromagnetic waves in the fourth high-frequency band, thereby avoiding the mutual coupling between the high-frequency oscillator 20 emitting electromagnetic waves in the fourth high-frequency band and the low-frequency oscillator 10, and ensuring that the radiation pattern of the high-frequency oscillator 20 emitting electromagnetic waves in the fourth high-frequency band does not distort.

[0066] Among them, the second filtering stub 220 filtering the electromagnetic waves in the fourth high-frequency band means that the second filtering stub 220 can suppress the high-frequency current generated by the coupling of the electromagnetic waves in the fourth high-frequency band on the low-frequency oscillator 10, so as to achieve the purpose of ensuring that the radiation pattern of the high-frequency oscillator 20 emitting electromagnetic waves in the fourth high-frequency band does not distort.

[0067] Moreover, the fourth high-frequency band is at least partially staggered from the first high-frequency band and the second high-frequency band, that is, the fourth high-frequency band and the first high-frequency band and the second high-frequency band have at least partial non-overlap, so that the low-frequency oscillator 10 can filter multiple frequencies, further increasing the filtering range of the low-frequency oscillator 10, enabling the low-frequency oscillator 10 to be used in cooperation with high-frequency oscillators 20 of different frequency bands, making the antenna meet the usage requirements of multiple systems and multiple frequency bands, and the radiation patterns of the high-frequency oscillators 20 of each frequency band will not be distorted, and the radiation performance is good.

[0068] Of course, when the frequency band ranges of the high-frequency oscillators 20 are relatively large, the first filtering part 110, the first filtering stub 120, the second filtering part 210 or the second filtering stub 220 can be flexibly set, so as to be able to flexibly filter the electromagnetic waves of each frequency band, ensuring that there is no mutual coupling when the electromagnetic waves of each frequency band are radiated onto the low-frequency oscillator 10, and ensuring that the radiation patterns of the high-frequency oscillators 20 of each frequency band will not be distorted.

[0069] At the same time, when the third high-frequency band and the fourth high-frequency band change, the filtering frequency band can also be adjusted accordingly by adjusting the length of the extending trajectory of the second filtering part 210 and / or adjusting the length of the extending trajectory of the second filtering stub 220, so that the antenna meets the usage requirements of multiple systems and multiple frequency bands, and the radiation patterns of the high-frequency oscillators 20 of each frequency band will not be distorted, and the radiation performance is good. For example, when the length of the extending trajectory of the second filtering stub 220 is extended, the filtering frequency band can be shifted to a lower frequency; when the length of the extending trajectory of the second filtering part 210 is extended, the filtering frequency band can also be shifted to a lower frequency; when the length of the extending trajectory of the second filtering stub 220 is shortened, the filtering frequency band can be shifted to a higher frequency; when the length of the extending trajectory of the second filtering part 210 is shortened, the filtering frequency band can also be shifted to a higher frequency.

[0070] Among them, the first radiation arm 100 can be in the structure of a strip, a sheet or a microstrip line, etc., and can be made of metal materials such as copper and aluminum.

[0071] Such as Figure 2 As shown, optionally, the first radiation arm 100 includes a first extension part 101 extending outward and a second extension part 102 connected to the first extension part 101 and extending toward both sides of the first extension part 101.

[0072] Specifically, the first extension portion 101 extends from the middle part of the support body 130 towards the outside of the support body 130. The extending direction of the second extension portion 102 is perpendicular to the extending direction of the first extension portion 101, and the second extension portion 102 is located on both sides (such as the left and right sides or the upper and lower sides) of the first extension portion 101, so that the entire first radiation arm 100 is in a T shape. Moreover, two adjacent first radiation arms 100 can share a feeding portion 1431. It can be that two adjacent first radiation arms 100 are connected by the same feeding piece at the middle part of the support body 130, and the feeding piece is plugged and matched with the protrusion of the same metal grounding microstrip line 143 to achieve electrical connection.

[0073] It should be noted that the structure of the second radiation arm 200 can be the same as that of the first radiation arm 100, and will not be elaborated here.

[0074] Among them, the setting position of the first filtering portion 110 on the first radiation arm 100 can be flexibly designed or adjusted according to actual usage needs, as long as it can filter the electromagnetic waves in the first high-frequency band. For example, the first filtering portion 110 can be separately provided on the first extension portion 101; the first filtering portion 110 can also be separately provided on the second extension portion 102; the first filtering portion 110 can also be provided on both the first extension portion 101 and the first extension portion 101 at the same time.

[0075] Among them, the setting position of the first filtering stub 120 on the first radiation arm 100 can be flexibly designed or adjusted according to actual usage needs, as long as it can filter the electromagnetic waves in the second high-frequency band. For example, it can be that the first extension portion 101 is separately provided with the first filtering stub 120; it can also be that the second extension portion 102 is separately provided with the first filtering stub 120; it can also be that both the first extension portion 101 and the second extension portion 102 are provided with the first filtering stub 120.

[0076] It should be noted that the setting position of the second filtering portion 210 on the second radiation arm 200 can be flexibly designed or adjusted according to actual usage needs, as long as it can filter the electromagnetic waves in the third high-frequency band. The setting position of the second filtering stub 220 on the second radiation arm 200 can be flexibly designed or adjusted according to actual usage needs, as long as it can filter the electromagnetic waves in the fourth high-frequency band.

[0077] Such as Figure 2As shown, in addition, the first extension portion 101 is provided with a first hollow groove 1011, and the second extension portion 102 is provided with a second hollow groove 1021. The second hollow groove 1021 communicates with the first hollow groove 1011 to form a hollow cavity for adjusting impedance matching. In this way, the impedance matching can be adjusted by adjusting the hollow area of the hollow cavity, and further, the impedance matching of the low-frequency oscillator 10 can be improved.

[0078] Specifically, both the first extension portion 101 and the second extension portion 102 include two relatively spaced-apart radiation strips. By changing the distance between the two relatively radiation strips, the hollow area of the hollow cavity can be adjusted.

[0079] In addition, in order to reduce the coupling between the high-frequency oscillator 20 and the low-frequency oscillator 10, it can also be achieved by reducing the shielding area of the low-frequency oscillator 10 for the high-frequency oscillator 20.

[0080] As Figure 2 shown, optionally, the line width of the first extension portion 101 and the second extension portion 102 is D, where D < 0.01λ and λ is the wavelength of the center frequency point. In this way, by designing the line widths of the first extension portion 101 and the second extension portion 102 to be relatively thin, the coupling between the high-frequency oscillator 20 and the low-frequency oscillator 10 can be reduced, and the radiation pattern of the high-frequency oscillator 20 can be improved.

[0081] Specifically, the width of the radiation strip is D.

[0082] Optionally, the sum of the lengths of the extension trajectories of the first extension portion 101 and the second extension portion 102 is L, where 0.9λ ≤ L ≤ 1.1λ. In this way, the lengths of the extension trajectories of the first extension portion 101 and the second extension portion 102 meet the radiation requirements, ensuring the radiation performance of the low-frequency oscillator 10.

[0083] Among them, the structure of the first filtering portion 110 can be flexibly adjusted according to actual processing and design requirements, as long as it can filter the electromagnetic waves in the first high-frequency band.

[0084] Optionally, the first filtering portion 110 includes at least two straight-line segments extending in a zigzag manner or extending in a reciprocating bent manner. In this way, the at least two straight-line segments extending in a straight line are connected to each other to form the first filtering portion 110.

[0085] Among them, when the first filtering portion 110 includes at least two straight-line segments extending in a zigzag manner, the adjacent two straight-line segments only need to satisfy that the phases of the coupling currents flowing through the adjacent two straight-line segments are opposite to cancel each other out, so as to achieve the filtering effect. The specific connection method and layout form are not limited.

[0086] As Figure 2As shown, when the first filtering unit 110 includes at least two straight segments arranged in a reciprocating and bending extension, the reciprocating and bending straight segments only need to satisfy that the phases of the coupling currents flowing through two adjacent straight segments are opposite to each other and cancel each other out, so as to achieve the filtering effect. The specific connection method and arrangement form are not limited.

[0087] Optionally, two straight segments are parallel to each other and arranged at intervals, and another straight segment is arranged between the two straight segments arranged at intervals and connects the two straight segments to form a minimum bending unit. By using at least one straight segment to connect at least two bending units, the first filtering unit 110 is formed.

[0088] As Figure 4 shown, optionally, the first filtering unit 110 includes at least two curved segments arranged at an angle. In this way, at least two curved segments extending in a curve are connected to each other to form the first filtering unit 110.

[0089] Moreover, at least two curved segments only need to satisfy that the phases of the coupling currents flowing through two adjacent curved segments are opposite to each other and cancel each other out, so as to achieve the filtering effect. The specific connection method and arrangement form are not limited.

[0090] Optionally, the first filtering unit 110 includes at least two straight segments and at least two curved segments, and the straight segments and the curved segments are arranged alternately and connected to each other. In this way, at least two straight segments extending in a straight line and at least two curved segments extending in a curve are alternately connected to each other to form the first filtering unit 110.

[0091] Moreover, at least two straight segments and two curved segments only need to satisfy that the phases of the coupling currents flowing through adjacent curved segments and straight segments are opposite to each other and cancel each other out, so as to achieve the filtering effect. The specific connection method and arrangement form are not limited.

[0092] It should be noted that the structure of the second filtering unit 210 can be the same as or similar to the structure of the first filtering unit 110, as long as it can filter the electromagnetic waves in the third high-frequency band, which will not be elaborated here.

[0093] Among them, the structure of the first filtering stub 120 can be flexibly adjusted according to actual processing and design requirements, as long as it can filter the electromagnetic waves in the second high-frequency band.

[0094] As Figure 2 shown, optionally, the first filtering stub 120 includes a first filtering section 121 and a second filtering section 122.

[0095] Among them, the first filtering section 121 is arranged at an angle with the first radiation arm 100. Preferably, the first filtering section 121 is arranged perpendicular to the first radiation arm 100.

[0096] Among them, the second filtering section 122 is arranged at an interval and parallel to the first radiation arm 100. Moreover, both ends of the first filtering section 121 are electrically connected to the second filtering section 122 and the first radiation arm 100 respectively. In this way, the phases of the coupled currents flowing through the first radiation arm 100 and the coupled currents flowing through the first filtering section 121 and the second filtering section 122 are opposite to each other and cancel each other out, thereby achieving the filtering effect.

[0097] Among them, the distance between the second filtering section 122 and the first radiation arm 100 is preferably 4 mm to 6 mm (it can be 4 mm, 5 mm or 6 mm), and the filtering effect is the best.

[0098] Of course, in other embodiments, the second filtering section 122 can also be arranged at other angles with the first filtering section 121, as long as it satisfies that the phases of the coupled currents flowing through the first radiation arm 100 and the coupled currents flowing through the first filtering section 121 and the second filtering section 122 are opposite to each other and cancel each other out, so as to achieve the filtering effect.

[0099] It should be noted that the structure of the second filtering stub 220 can be the same as or similar to the structure of the first filtering stub 120, as long as it can filter the electromagnetic waves in the fourth high-frequency band, and details are not described here.

[0100] In addition, the numbers of the first filtering part 110, the second filtering part 210, the first filtering stub 120 and the second filtering stub 220 can also be flexibly adjusted or designed according to actual usage needs, and are not limited here.

[0101] As Figure 9 shown, in addition, the gain of the low-frequency oscillator 10 in the above embodiment is also 0.3 dB to 0.5 dB higher than that of the traditional low-frequency oscillator 10.

[0102] In addition, the length of the extended trajectory refers to the trajectory length of the component from one end to the other end.

[0103] In one embodiment, a method for adjusting the filtering frequency band is also provided. By adjusting the extended trajectory length of the first filtering part 110 and / or adjusting the extended trajectory length of the first filtering stub 120, the filtering frequency band is adjusted.

[0104] The method for adjusting the filtering frequency band in the above embodiment enables the antenna to meet the usage requirements of multiple systems and multiple frequency bands, and the radiation patterns of the high-frequency oscillators 20 in each frequency band will not be distorted, and the radiation performance is good.

[0105] It should be noted that "a certain body" and "a certain part" can be a part of the corresponding "component", that is, "a certain body" and "a certain part" are integrally formed with the "other parts of the component"; or they can be an independent component separable from the "other parts of the component", that is, "a certain body" and "a certain part" can be manufactured independently and then combined with the "other parts of the component" to form a whole. The expression of "a certain body" and "a certain part" in this application is only one embodiment for the convenience of reading, rather than a limitation on the scope of protection of this application. As long as the above features are included and the functions are the same, it should be understood as an equivalent technical solution of this application.

[0106] It should be noted that the components included in the "unit", "component", "mechanism", and "device" of this application can also be flexibly combined, that is, modular production can be carried out according to actual needs to facilitate modular assembly. The division of the above components in this application is only one embodiment for the convenience of reading, rather than a limitation on the scope of protection of this application. As long as the above components are included and the functions are the same, it should be understood as an equivalent technical solution of this application.

[0107] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0108] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0109] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication between two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0110] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0111] It should be noted that when an element is referred to as being "fixed to", "arranged on", "secured to" or "installed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. Further, when an element is considered to be "fixedly drivingly connected" to another element, the two may be fixed in a detachable connection manner or a non-detachable connection manner, as long as power transmission can be achieved, such as socket connection, snap connection, integral molding fixation, welding, etc., which can be achieved in the prior art and will not be elaborated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is perpendicular, but due to manufacturing and assembly effects, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0112] It should also be understood that when interpreting the connection relationship or position relationship of elements, although not explicitly described, the connection relationship and position relationship are interpreted to include an error range, and this error range should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "about", "approximately" or "substantially" may mean within one or more standard deviations, which will not be limited herein.

[0113] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0114] The above embodiments only express several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be understood as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A low-frequency oscillator, characterized in that, Comprising: Two sets of folded dipoles with orthogonal polarization, each set of the folded dipoles including two oppositely arranged first radiation arms, and at least one of the first radiation arms being provided with a first filtering portion for filtering electromagnetic waves in a first high-frequency band; and A first filtering stub, one end of the first filtering stub being electrically connected to the first radiation arm, and the first filtering stub being used for filtering electromagnetic waves in a second high-frequency band; Wherein, the first high-frequency band and the second high-frequency band are at least partially staggered; The low-frequency dipole further includes a second radiation arm, and at least one of the second radiation arms is provided with a second filtering portion for filtering electromagnetic waves in a third high-frequency band, wherein the third high-frequency band and the first high-frequency band and the second high-frequency band are at least partially staggered; The low-frequency dipole includes a support body, the support body being provided with a first side surface and a second side surface arranged oppositely, the first radiation arm being arranged on the first side surface, the second radiation arm being arranged on the second side surface, and the first radiation arm and the second radiation arm being correspondingly and coupledly arranged.

2. The low-frequency oscillator according to claim 1, wherein The low-frequency dipole includes a feeding balun, both sets of the folded dipoles being arranged on the first side surface, the feeding balun being arranged on the side where the second side surface is located, and the feeding balun being used for feeding both sets of the folded dipoles.

3. The low-frequency oscillator according to claim 2, characterized in that, The low-frequency dipole further includes four second radiation arms, all four second radiation arms being arranged on the second side surface, the four second radiation arms being correspondingly and coupledly arranged with the four first radiation arms one by one, and all four second radiation arms being spaced apart from the feeding balun.

4. The low-frequency oscillator according to claim 3, characterized in that, The low-frequency dipole further includes a second filtering stub, one end of the second filtering stub being electrically connected to the second radiation arm, and the second filtering stub being used for filtering electromagnetic waves in a fourth high-frequency band, wherein the fourth high-frequency band and the first high-frequency band and the second high-frequency band are at least partially staggered.

5. The low-frequency oscillator according to claim 2, wherein The feeding balun includes two orthogonally arranged feeding elements, each feeding element being provided with two feeding portions for respectively feeding the two first radiation arms in the same set of the folded dipoles, and two adjacent first radiation arms sharing one feeding portion.

6. The low-frequency oscillator according to any one of claims 1 to 5, characterized in that, The first radiation arm includes a first extension portion extending outward and a second extension portion connected to the first extension portion and extending toward both sides of the first extension portion; the first extension portion and / or the second extension portion is provided with the first filtering portion; the first extension portion and / or the second extension portion is correspondingly provided with the first filtering stub.

7. The low-frequency oscillator according to claim 6, characterized in that, The first extension portion is provided with a first hollowed-out groove, the second extension portion is provided with a second hollowed-out groove, and the second hollowed-out groove communicates with the first hollowed-out groove to form a hollowed-out cavity for adjusting impedance matching.

8. The low-frequency oscillator according to claim 6, characterized in that, The line width of the first extension portion and the second extension portion is D, the sum of the lengths of the extension trajectories of the first extension portion and the second extension portion is L, wherein D < 0.01λ, 0.9λ ≤ L ≤ 1.1λ, and λ is the wavelength of the center frequency point.

9. The low-frequency oscillator according to any one of claims 1 to 5, characterized in that, The first filtering part includes at least two straight line segments extending in a broken line or extending in a reciprocating bent manner; or the first filtering part includes at least two curved line segments arranged at an angle; or the first filtering part includes at least two straight line segments and at least two curved line segments, and the straight line segments and the curved line segments are alternately arranged and connected to each other.

10. The low-frequency oscillator according to any one of claims 1 to 5, characterized in that, The first filtering stub includes a first filtering section and a second filtering section. The first filtering section is arranged at an angle with the first radiating arm. The second filtering section is spaced from and parallel to the first radiating arm. Two ends of the first filtering section are electrically connected to the second filtering section and the first radiating arm respectively.

11. An antenna, characterized in that, It includes the low-frequency oscillator according to any one of claims 1 to 10.

12. A method for adjusting a filtering frequency band of a low-frequency oscillator as described in any one of claims 1 to 10, characterized in that, By adjusting the extension track length of the first filtering part and / or adjusting the extension track length of the first filtering stub, the filtering frequency band is adjusted.

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