Wideband wearable dual-frequency filtering antenna with independent and controllable radiation zero point

Abstract

The invention discloses a broadband wearable double-frequency filtering antenna with an independent and controllable radiation zero point, and the antenna employs a double-layer dielectric substrate structure, the upper layer is a Rogers4350B substrate, the lower layer is a flexible felt substrate, and a multi-structure coupling design of a T-shaped strip, a U-shaped groove, a rectangular groove and a parasitic strip is integrated through a rectangular radiation patch. And dual-frequency work and radiation zero independent regulation and control are realized. Wherein the T-shaped strip generates a dual-frequency characteristic and a first radiation zero point between two frequency bands; the U-shaped groove regulates and controls the low-frequency zero point and broadens the low- The rectangular groove introduces a second radiation zero point between two frequency bands and expands the high-frequency bandwidth; a high-frequency zero point and a new resonance point are introduced into the parasitic strip, and the high-frequency matching bandwidth is widened. The antenna has the flexible wearable characteristic, the broadband performance and the independent controllable characteristic of the radiation zero point, and is suitable for wireless communication scenes such as WiMAX / WLAN and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a broadband wearable dual-band filtering antenna with independently controllable radiation zero points and a wireless communication device. Background Art

[0002] With the rapid development of wireless communication technology, users are increasingly demanding smaller, more versatile, and more powerful communication devices. Filter antennas, as an emerging technology, can improve a system's spectrum efficiency and anti-interference capabilities. However, existing filter antennas are mostly based on rigid substrates, making them difficult to meet the flexibility, lightweight, and comfort requirements of wearable devices. Most operate only in a single frequency band, making them difficult to meet dual-band communication requirements. Furthermore, the radiation null point of traditional filter antennas is difficult to independently control, limiting their performance optimization. The development of a broadband, wearable, dual-band filter antenna with an independently controllable radiation null point could help improve filtering characteristics and adapt to complex wireless environments. Summary of the Invention

[0003] The first purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and provide a broadband wearable dual-band filtering antenna with independently controllable radiation zero point. While meeting wearable requirements, the antenna has good broadband characteristics and stable gain, while realizing a dual-band working mode. Through independently controllable radiation zero point adjustment technology, it optimizes filtering performance and anti-interference capability, improves spectrum utilization, and meets the needs of modern wireless communication equipment.

[0004] A second object of the present invention is to provide a wireless communication device.

[0005] The first object of the present invention is achieved through the following technical solution: a broadband wearable dual-band filtering antenna with independently controllable radiation zero point, comprising a first dielectric substrate, a second dielectric substrate, a ground, a rectangular radiation patch, a T-shaped strip, a U-shaped groove, a rectangular groove, a parasitic strip and a coaxial probe; the first dielectric substrate is stacked on top of the second dielectric substrate, with an air gap between the two, the rectangular radiation patch is arranged on the upper surface of the first dielectric substrate, the T-shaped strip is located in front of the upper edge of the rectangular radiation patch, and the vertical edge of the T-shaped strip is connected to the upper edge of the rectangular radiation patch, for generating dual-band characteristics and a first radiation between two frequency bands Zero point, the U-shaped groove is located in the middle and lower part of the rectangular radiation patch, and is used to generate a low-frequency radiation zero point and a new resonance point as well as to widen the low-frequency matching bandwidth. The coaxial probe passes through the rectangular radiation patch, the first dielectric substrate and the second dielectric substrate, and is close to the bottom of the rectangular radiation patch. The rectangular groove is located on both sides of the U-shaped groove, and is used for a second radiation zero point and a new resonance point between the two frequency bands as well as to widen the high-frequency matching bandwidth. The parasitic strips are located on the left and right sides of the rectangular radiation patch, and are used to generate a high-frequency radiation zero point and a new resonance point as well as to widen the high-frequency matching bandwidth. The ground is set on the lower surface of the second dielectric substrate.

[0006] Preferably, the length of the U-shaped groove is half the wavelength corresponding to the low-frequency radiation zero-point frequency. By controlling the length of the U-shaped groove, the left-right movement of the low-frequency radiation zero-point can be controlled.

[0007] Preferably, the T-shaped strip controls the first radiation zero point between the two frequency bands, and the left-right movement of the first radiation zero point between the two frequency bands can be controlled by controlling the length of the T-shaped strip.

[0008] Preferably, the length of the rectangular slot is one quarter of the wavelength corresponding to the second radiation zero point frequency between the two frequency bands. By controlling the length of the rectangular slot, the left and right movement of the second radiation zero point between the two frequency bands can be controlled.

[0009] Preferably, the length of the parasitic strip is half the wavelength corresponding to the high-frequency radiation zero-point frequency, and the left-right movement of the high-frequency radiation zero-point can be controlled by controlling the length of the parasitic strip.

[0010] Preferably, the rectangular radiation patch is located in the middle of the upper surface of the first dielectric substrate, and the rectangular radiation patch, T-shaped strip, U-shaped groove, rectangular groove, and parasitic strip are bilaterally symmetrical about the center line of the first dielectric substrate, and the ground is bilaterally symmetrical about the center line of the second dielectric substrate.

[0011] Preferably, the opening of the U-shaped groove faces the upper edge of the rectangular radiation patch.

[0012] Preferably, there are two parasitic strips on the left and right sides of the rectangular radiation patch, and the parasitic strips are distributed front to back.

[0013] Preferably, the ground covers the entire lower surface of the second dielectric substrate.

[0014] Preferably, the medium used for the first dielectric substrate is Rogers 4350B, with a dielectric constant of 3.66 and a loss tangent of 0.0037.

[0015] Preferably, the medium used for the second dielectric substrate is a flexible and bendable felt material with a dielectric constant of 1.2 and a loss tangent of 0.2.

[0016] Preferably, the floor material is conductive nylon fabric with a surface resistivity less than 0.009Ω / m 2 .

[0017] Preferably, the rectangular radiation patch is made of copper.

[0018] The second object of the present invention is achieved through the following technical solution: a wireless communication device includes the above-mentioned broadband wearable dual-band filtering antenna with independently controllable radiation zero point.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. The antenna of the present invention achieves dual-band characteristics and a radiation null at low frequencies by attaching a T-shaped strip to a rectangular radiating patch. By attaching a U-shaped slot, this introduces both a radiation null at low frequencies and a new resonance point, broadening the low-frequency matching bandwidth. By attaching rectangular slots on either side of the U-shaped slot, the filtering performance between the two frequency bands is further optimized and the high-frequency matching bandwidth is broadened. By attaching a parasitic strip, a radiation null is introduced at high frequencies, adding new resonance points and broadening the high-frequency matching bandwidth. Ultimately, the antenna achieves dual-band filtering characteristics, independent controllability of the radiation null, and excellent broadband characteristics.

[0021] 2. The antenna of the present invention utilizes a combination of T-strips, U-slots, rectangular slots, and parasitic strips loaded onto a rectangular radiating patch to achieve a broadband, wearable, dual-band filtering antenna with independently controllable radiation nulls. The antenna has a low-frequency matching bandwidth of 8.6% (3.33-3.63 GHz) and a high-frequency matching bandwidth of 24.8% (5.01-6.42 GHz), meeting broadband requirements. Peak gains within the passband are 7.7 dBi and 10.7 dBi, respectively, and out-of-band rejection exceeds 14.5 dB. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to an embodiment of the present invention.

[0023] Figure 2 This is a top view of the upper dielectric substrate of the broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to an embodiment of the present invention.

[0024] Figure 3 This is a cross-sectional view of a broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to an embodiment of the present invention.

[0025] Figure 4 This is an S-parameter diagram of the broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to an embodiment of the present invention.

[0026] Figure 5 This is a gain curve diagram of the broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to an embodiment of the present invention.

[0027] Figure 6 This is the E-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point at 3.38 GHz according to an embodiment of the present invention.

[0028] Figure 7 This is the H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point at 3.38 GHz according to an embodiment of the present invention.

[0029] Figure 8 This is the E-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point at 3.58 GHz according to an embodiment of the present invention.

[0030] Figure 9 This is the H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point at 3.58 GHz according to an embodiment of the present invention.

[0031] Figure 10 This is the E-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero points at 5.14 GHz according to an embodiment of the present invention.

[0032] Figure 11 This is the H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero points at 5.14 GHz according to an embodiment of the present invention.

[0033] Figure 12 This is the E-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero points at 5.68 GHz according to an embodiment of the present invention.

[0034] Figure 13 This is the H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero points at 5.68 GHz according to an embodiment of the present invention.

[0035] Figure 14This is the E-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero points at 6.32 GHz according to an embodiment of the present invention.

[0036] Figure 15 This is the H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero points at 6.32 GHz according to an embodiment of the present invention.

[0037] Figure 16 This is a schematic structural diagram of a broadband wearable dual-band filtering antenna with independently controllable radiation zero points loaded with a three-layer human tissue model according to an embodiment of the present invention.

[0038] Figure 17 Figure 2 shows an S-parameter diagram of a three-layer human tissue model loaded with a broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to an embodiment of the present invention.

[0039] Figure 18 This is a graph showing the SAR value of a broadband wearable dual-band filtering antenna with independently controllable radiation null points at 3.5 GHz when loaded with a three-layer human tissue model according to an embodiment of the present invention.

[0040] Figure 19 This is a graph showing the SAR value of a broadband wearable dual-band filtering antenna with independently controllable radiation null points loaded with a three-layer human tissue model at 5.5 GHz according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0042] Example 1

[0043] This paper discloses a broadband wearable dual-band filtering antenna with independently controllable radiation zero point. Through structural innovation, it realizes dual-band operation, broadband matching and flexible regulation of radiation zero point, while meeting the flexibility and human safety requirements of wearable devices. Figures 1 to 3 As shown, it includes a first dielectric substrate 3, a second dielectric substrate 2, a ground 1, a rectangular radiation patch 4, a T-shaped strip 5, a U-shaped groove 8, a rectangular groove 7, a parasitic strip 9 and a coaxial probe 6; the first dielectric substrate 3 is stacked on the second dielectric substrate 2, the T-shaped strip 5 is located in front of the upper edge of the rectangular radiation patch 4, and the vertical edge of the T-shaped strip 5 is connected to the upper edge of the rectangular radiation patch 4, the rectangular radiation patch 4 is arranged in the middle position of the upper surface of the first dielectric substrate 3, the U-shaped groove 8 is located in the middle and lower part of the rectangular radiation patch 4, and its opening faces the upper edge of the rectangular radiation patch 4, the coaxial probe 6 passes through the rectangular radiation patch 4, the first dielectric substrate 3 and the second dielectric substrate 2, and is close to the lower edge of the rectangular radiation patch 4, the rectangular groove 7 is located on both sides of the U-shaped groove 8, and the parasitic strip 9 is located on the left and right sides of the rectangular radiation patch 4.

[0044] This embodiment creates dual-band characteristics by attaching a T-shaped strip 5 to a rectangular radiating patch 4, introducing a first radiation null in the low-frequency band. Furthermore, by attaching a U-shaped slot 8, this introduces a radiation null in the low-frequency band and simultaneously stimulates a new resonance point, broadening the low-frequency matching bandwidth. The length of the U-shaped slot 8 is half the wavelength corresponding to the low-frequency radiation null frequency. Adjusting its length allows the frequency position of the low-frequency radiation null to be independently controlled.

[0045] Furthermore, by adding symmetrical rectangular slots 7 on either side of the U-shaped slot 8, a second radiation null is introduced between the two frequency bands, stimulating a new high-frequency resonance point and extending the high-frequency matching bandwidth. The length of the rectangular slot 7 is one-quarter of the wavelength corresponding to the radiation null frequency, and the position of this null can be independently controlled by adjusting its size.

[0046] Furthermore, by adding a parasitic strip 9, a radiation null is introduced in the high-frequency band and the high-frequency bandwidth is further broadened. The length of the parasitic strip 9 is half the wavelength corresponding to the high-frequency radiation null frequency, and its size can be changed to accurately adjust the high-frequency null frequency.

[0047] Preferably, the rectangular radiation patch 4 , T-shaped strip 5 , U-shaped slot 8 , rectangular slot 7 , and parasitic strip 9 are bilaterally symmetrical about the center line of the first dielectric substrate 3 , and the ground 1 is bilaterally symmetrical about the center line of the second dielectric substrate 2 .

[0048] Preferably, the first dielectric substrate 3 is made of Rogers 4350B (dielectric constant 3.66, loss tangent 0.0037), and the second dielectric substrate 2 is made of flexible felt (dielectric constant 1.2, loss tangent 0.2).

[0049] Preferably, the ground 1 is made of conductive nylon fabric (resistivity < 0.009Ω / m 2 ), the rectangular radiation patch 4 is made of copper.

[0050] Preferably, the ground 1 covers the entire lower surface of the second dielectric substrate 2 .

[0051] See also Figure 4 As shown in the figure, it is the S parameter simulation curve of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point in this embodiment. From the figure, we can see that the antenna's |S 11 |<-10dB bandwidths are 3.33-3.63GHz (8.6%) and 5.01-6.42GHz (24.8%), respectively, and are applied to the 3.5GHz WiMAX band (3.4-3.6GHz) and 5GHz WLAN band (5.15-5.825GHz).

[0052] See also Figure 5Figure 2 shows the gain simulation curve of the broadband wearable dual-band filter antenna with independently controllable radiation nulls in this embodiment. Peak gain within the passband reaches 7.7dBi (low frequency) and 10.7dBi (high frequency). Four radiation nulls are introduced at 3.18, 4.12, 4.58, and 6.72GHz on the gain curve, achieving an out-of-band suppression level exceeding 14.5dB.

[0053] See also Figure 6 and Figure 7 As shown in the figure, the E-plane radiation field pattern and H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point at 3.38 GHz in this embodiment are shown. It can be seen from the figure that the antenna has good directional radiation characteristics at this frequency, with a cross-polarization ratio greater than 35 dB and a front-to-back ratio greater than 18 dB.

[0054] See also Figure 8 and Figure 9 As shown in the figure, the E-plane radiation field pattern and H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point at 3.58 GHz in this embodiment are shown. It can be seen from the figure that the antenna has good directional radiation characteristics at this frequency, with a cross-polarization ratio greater than 35 dB and a front-to-back ratio greater than 18 dB.

[0055] See also Figure 10 and Figure 11 As shown in the figure, the E-plane radiation field pattern and H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point at 5.14 GHz in this embodiment are shown. It can be seen from the figure that the antenna has good directional radiation characteristics at this frequency point, with a cross-polarization ratio greater than 51 dB and a front-to-back ratio greater than 15 dB.

[0056] See also Figure 12 and Figure 13 As shown in the figure, the E-plane radiation field pattern and H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point at 5.68 GHz in this embodiment are shown. It can be seen from the figure that the antenna has good directional radiation characteristics at this frequency, with a cross-polarization ratio greater than 50 dB and a front-to-back ratio greater than 15 dB.

[0057] See also Figure 14 and Figure 15 As shown in the figure, the E-plane radiation field pattern and H-plane radiation field pattern of the broadband wearable dual-band filtering antenna with independently controllable radiation zero point at 6.32 GHz in this embodiment are shown. It can be seen from the figure that the antenna has good directional radiation characteristics at this frequency, with a cross-polarization ratio greater than 42 dB and a front-to-back ratio greater than 16 dB.

[0058] See also Figure 16Figure 2 shows a schematic diagram of the structure of the broadband wearable dual-band filter antenna with independently controllable radiation null points in this embodiment, loaded with a three-layer human tissue model. The three-layer human tissue model is used to simulate the impact of human body loading on antenna performance and assess whether the antenna's radiation to the human body meets safety standards.

[0059] See also Figure 17 Figure 2 shows the S-parameters of the broadband wearable dual-band filtering antenna with independently controllable radiation null points in this embodiment, loaded with a three-layer human tissue model. As can be seen from the figure, after loading the three layers of human tissue, the bandwidth narrows somewhat, to 3.35-3.63 GHz (8.0%) and 5.02-6.42 GHz (24.4%). However, it still covers the 3.5 GHz WiMAX band and the 5 GHz WLAN band, meeting usage requirements.

[0060] See also Figure 18 and Figure 19 Figure 2 shows the SAR values of the broadband wearable dual-band filtering antenna with independently controllable radiation null points in this embodiment, loaded with a three-layer human tissue phantom, at 3.5 GHz and 5.5 GHz. As can be seen from the figure, the antenna's maximum SAR values are 0.0647 W / kg and 0.0964 W / kg, respectively, far below the international safety standard of 1.6 W / kg.

[0061] In summary, the present invention realizes dual-frequency working characteristics by loading a T-shaped strip on a rectangular radiation patch, and introduces the first radiation zero point between the two frequency bands; by loading a U-shaped slot on the rectangular radiation patch, not only a low-frequency radiation zero point is introduced, but also the bandwidth is further widened. The length of the U-shaped slot is approximately half the wavelength corresponding to the low-frequency radiation zero point frequency, and the zero point position can be precisely controlled by adjusting its length; in addition, by loading a rectangular slot, a second radiation zero point is introduced between the two frequency bands and a new high-frequency resonance point is excited, so that the high-frequency bandwidth is further expanded. The length of the rectangular slot is approximately one-quarter the wavelength of the corresponding radiation zero point frequency, and its size can independently regulate the position of the high-frequency zero point. By loading a parasitic strip, a radiation zero point is introduced in the high-frequency band and the high-frequency bandwidth is further widened. The length of the parasitic strip is approximately half the wavelength corresponding to the high-frequency radiation zero point frequency, and can be used to precisely adjust the high-frequency zero point frequency. In addition, a three-layer human tissue model was loaded to evaluate the performance of the antenna in an actual wearable environment to ensure that the bandwidth and radiation characteristics meet the requirements. Ultimately, |S11|<-10dB was achieved with a bandwidth of 3.33-3.63GHz (8.6%) and 5.01-6.42GHz (24.8%), in-band peak gains of 7.7dBi (low frequency) and 10.7dBi (high frequency), respectively. The out-of-band suppression level was higher than 14.5dB, and the maximum SAR values were 0.0647W / kg and 0.0964W / kg, respectively, which are far less than the international safety standard of 1.6W / kg, ensuring the safety and wearable adaptability of the antenna.

[0062] Example 2

[0063] This embodiment provides a wireless communication device, including the broadband wearable dual-band filtering antenna with independently controllable radiation zero points described in Example 1.

[0064] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A broadband wearable dual-band filtering antenna with independently controllable radiation zero point, characterized in that: The invention comprises a first dielectric substrate (3), a second dielectric substrate (2), a ground (1), a rectangular radiation patch (4), a T-shaped strip (5), a U-shaped groove (8), a rectangular groove (7), a parasitic strip (9) and a coaxial probe (6); the first dielectric substrate (3) is stacked on the second dielectric substrate (2), with an air gap between the two; the rectangular radiation patch (4) is arranged on the upper surface of the first dielectric substrate (3); the T-shaped strip (5) is located in front of the upper edge of the rectangular radiation patch (4), and the vertical edge of the T-shaped strip (5) is connected to the upper edge of the rectangular radiation patch (4), so as to generate a dual-frequency characteristic and a first radiation zero point between two frequency bands; the U-shaped groove (8) is located in the rectangular The middle and lower part of the radiation patch (4) is used to generate a low-frequency radiation zero point and a new resonance point and widen the low-frequency matching bandwidth. The coaxial probe (6) passes through the rectangular radiation patch (4), the first dielectric substrate (3) and the second dielectric substrate (2) and is close to the bottom of the rectangular radiation patch (4). The rectangular groove (7) is located on both sides of the U-shaped groove (8) and is used to generate a second radiation zero point and a new resonance point between the two frequency bands and widen the high-frequency matching bandwidth. The parasitic strip (9) is located on the left and right sides of the rectangular radiation patch (4) and is used to generate a high-frequency radiation zero point and a new resonance point and widen the high-frequency matching bandwidth. The ground (1) is set on the lower surface of the second dielectric substrate (2).

2. A broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to claim 1, characterized in that: The length of the U-shaped groove (8) is half the wavelength corresponding to the low-frequency radiation zero-point frequency, and the left-right movement of the low-frequency radiation zero-point can be controlled by controlling the length of the U-shaped groove (8).

3. The broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to claim 1, characterized in that: The T-shaped strip (5) controls the first radiation zero point between the two frequency bands, and the left-right movement of the first radiation zero point between the two frequency bands can be controlled by controlling the length of the T-shaped strip (5).

4. The broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to claim 1, characterized in that: The length of the rectangular slot (7) is a quarter of a wavelength corresponding to the second radiation zero point frequency between the two frequency bands, and the left-right movement of the second radiation zero point between the two frequency bands can be controlled by controlling the length of the rectangular slot (7).

5. The broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to claim 1, characterized in that: The length of the parasitic strip (9) is half the wavelength corresponding to the high-frequency radiation zero-point frequency, and the left-right movement of the high-frequency radiation zero-point can be controlled by controlling the length of the parasitic strip (9).

6. The broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to claim 1, characterized in that: The rectangular radiation patch (4) is located in the middle of the upper surface of the first dielectric substrate (3); the rectangular radiation patch (4), the T-shaped strip (5), the U-shaped groove (8), the rectangular groove (7), and the parasitic strip (9) are in a bilaterally symmetrical structure with respect to the center line of the first dielectric substrate (3); and the ground (1) is in a bilaterally symmetrical structure with respect to the center line of the second dielectric substrate (2).

7. The broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to claim 1, characterized in that: The opening of the U-shaped groove (8) faces the upper edge of the rectangular radiation patch (4).

8. The broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to claim 1, characterized in that: There are two parasitic strips (9) on the left and right sides of the rectangular radiation patch (4), and the parasitic strips (9) are distributed front to back.

9. The broadband wearable dual-band filtering antenna with independently controllable radiation zero points according to claim 1, characterized in that: The ground (1) covers the entire lower surface of the second dielectric substrate (2).

10. A wireless communication device, characterized in that: A broadband wearable dual-band filtering antenna with independently controllable radiation zero points comprising the method according to any one of claims 1 to 10.

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