CN210668688U - Seven trapped wave microstrip antenna with U-shaped grooves embedded and sleeved mutually in open-loop groove - Google Patents
Seven trapped wave microstrip antenna with U-shaped grooves embedded and sleeved mutually in open-loop groove Download PDFInfo
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Abstract
The utility model discloses a seven-notch microstrip antenna with U-shaped grooves embedded in open-loop grooves, wherein a first arc open-loop resonator and a second arc open-loop resonator have different shapes, and the second arc open-loop resonator and a third arc open-loop resonator have different shapes; the distance between the first U-shaped parasitic strip and the second U-shaped parasitic strip is 0.9 mm; the distance between the third U-shaped parasitic strip and the fourth U-shaped parasitic strip is 1 mm; the distances between the U-shaped parasitic bands at the two sides of the microstrip feeder line and the microstrip feeder line are different; the length of the first U-shaped parasitic band connecting arm is 6.1 mm; the length of the connecting arm of the second U-shaped parasitic belt is 6.6 mm; the length of the connecting arm of the third U-shaped parasitic belt is 6.5 mm; the length of the connecting arm of the fourth type of U-shaped parasitic band is 6.5 mm. The trap antenna aims to solve the problems that no 7 trap antenna can be realized in the prior art; secondly, the problem of strong coupling exists among all trapped wave structures of the existing trapped wave antenna.
Description
Technical Field
The utility model relates to the field of radio technology, especially, relate to a seven trapped wave microstrip antenna that ring-opening groove inlayed each other and overlaps with type U-shaped groove.
Background
In recent years, research on Ultra-Wideband (Ultra-Wideband) antennas is receiving more and more attention, particularly, after FCC stipulates a 3.1-10.6GHz band as a civil band in 2002, the Ultra-Wideband antenna of the band is developed, and the band is overlapped with some existing applied bands, such as WiMAX band uplink and downlink band, instat band uplink and downlink band, WLAN band downlink band and X band uplink and downlink band, which are narrow-band signals, and these narrow-band signals can generate electromagnetic interference on an Ultra-Wideband communication system, and the interference is usually suppressed by adopting a band-stop filter or a notch antenna, but the size, cost and complexity of the antenna are increased by adopting a band-stop filter; the notch antenna is adopted, and firstly, the prior art does not have a notch antenna capable of simultaneously filtering 7 notches; secondly, strong coupling exists among the notch structures of the existing notch antenna, namely after one notch frequency is adjusted, other notch frequencies can be changed along with the adjustment, so that the notch antenna has very poor adaptability, one notch antenna structure can only correspond to a narrow-band signal with a specific frequency, and when one frequency of the notch antenna is changed, the structure of the whole notch antenna needs to be redesigned.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the utility model mainly aims to provide a seven-notch microstrip antenna with U-shaped grooves embedded in open-loop grooves.
The technical scheme of the utility model is that: a seven-notch microstrip antenna with an added U-shaped groove and mutually embedded and sleeved in an open-loop groove comprises:
a dielectric substrate;
the metal grounding surface covers the lower surface of the dielectric substrate;
the radiation patch is covered on the upper surface of the dielectric substrate, the radiation patch is bilaterally symmetrical by taking a vertical central axis of the dielectric substrate as a central axis, the radiation patch is made of metal, a first arc-shaped open-loop resonator is arranged in the radiation patch, a second arc-shaped open-loop resonator is arranged on the radiation patch in the first arc-shaped open-loop resonator, and a third arc-shaped open-loop resonator is arranged on the radiation patch in the second arc-shaped open-loop resonator;
the upper part and the lower part of the right side of the microstrip feeder line are respectively provided with a third type U-shaped parasitic band and a fourth type U-shaped parasitic band;
the first arc-shaped open-loop resonator and the second arc-shaped open-loop resonator are different in shape, and the second arc-shaped open-loop resonator and the third arc-shaped open-loop resonator are different in shape;
the distance between the lower edge of the first U-shaped parasitic band and the upper edge of the second U-shaped parasitic band is 0.9 mm;
the distance between the lower edge of the third U-shaped parasitic band and the upper edge of the fourth U-shaped parasitic band is 1 mm;
the distance between the first U-shaped parasitic strip and the second U-shaped parasitic strip and the microstrip feeder line is different from the distance between the first U-shaped parasitic strip and the second U-shaped parasitic strip and the microstrip feeder line;
the length of the first U-shaped parasitic band connecting arm is 6.1 mm;
the length of the connecting arm of the second U-shaped parasitic belt is 6.6 mm;
the length of the connecting arm of the third U-shaped parasitic belt is 6.5 mm;
the length of the connecting arm of the fourth type of U-shaped parasitic band is 6.5 mm.
Further, the radiating patch is elliptical;
the first arc-shaped open-loop resonator is in an ellipse shape similar to the radiation patch, the long axis of the first arc-shaped open-loop resonator is overlapped with the long axis of the radiation patch, and the short axis of the first arc-shaped open-loop resonator is overlapped with the short axis of the radiation patch.
Further, the second arc-shaped open-loop resonator is circular, and the center of the second arc-shaped open-loop resonator coincides with the center of the radiation patch.
Further, the third arc-shaped open-loop resonator is elliptical, a long axis of the third arc-shaped open-loop resonator coincides with a long axis of the radiation patch, and a short axis of the third arc-shaped open-loop resonator coincides with a short axis of the radiation patch.
Further, Roggers5880 is adopted as the dielectric substrate material, the thickness is 0.8mm, the length is 40mm, and the width is 38 mm;
the width of the microstrip feeder line is 1.9mm, the length of the microstrip feeder line is 20.2mm, and the resistance of the microstrip feeder line is 50 omega;
the long axis of the radiation patch is 10mm, and the short axis of the radiation patch is 8 mm;
the arc length of the notch of the first arc-shaped open-loop resonator is 4mm, and the length of the first arc-shaped open-loop resonator is 43.6 mm;
the arc length of the notch of the second arc-shaped open-loop resonator is 3mm, and the length of the second arc-shaped open-loop resonator is 33.4 mm;
the arc length of the notch of the third arc-shaped open-loop resonator is 2.4mm, and the length of the third arc-shaped open-loop resonator is 29.77 mm;
the total length of the first U-shaped parasitic band is 17.5 mm;
the total length of the second U-shaped parasitic band is 25.1 mm;
the total length of the third U-shaped parasitic band is 15.5 mm;
the total length of the fourth U-shaped parasitic band is 20.5 mm.
Further, the width of the first arc-shaped open-loop resonator is 0.5mm, the width of the second arc-shaped open-loop resonator is 0.4mm, and the width of the third arc-shaped open-loop resonator is 0.3 mm;
the width of the first U-shaped parasitic band, the second U-shaped parasitic band, the third U-shaped parasitic band and the fourth U-shaped parasitic band is 0.5 mm.
Further, the distance between the second U-shaped parasitic strip and the lower edge of the dielectric substrate is 3.5mm, and the distance between the fourth U-shaped parasitic strip and the lower edge of the dielectric substrate is 5.9 mm.
Further, the distance between the first U-shaped parasitic strip and the microstrip feeder line is 0.55mm, the distance between the second U-shaped parasitic strip and the microstrip feeder line is 0.55mm, the distance between the third U-shaped parasitic strip and the microstrip feeder line is 0.35mm, and the distance between the fourth U-shaped parasitic strip and the microstrip feeder line is 0.35 mm.
The utility model has the advantages that: compared with the prior art, the utility model has the advantages of it is following:
1) 7 trapped waves are realized through the first arc-shaped open-loop resonator, the second arc-shaped open-loop resonator, the third arc-shaped open-loop resonator, the first U-shaped parasitic band, the second U-shaped parasitic band, the third U-shaped parasitic band and the fourth U-shaped parasitic band, namely, the trapped wave function can be realized on narrow-band signals of 7 frequency bands at the same time;
2) the shapes of the first arc-shaped open-loop resonator and the second arc-shaped open-loop resonator are different, so that the shapes of the second arc-shaped open-loop resonator and the third arc-shaped open-loop resonator are different, and strong coupling influence generated between two adjacent resonators with similar shapes is avoided;
3) the distance between the first U-shaped parasitic strip and the second U-shaped parasitic strip is set to be 0.9mm, and the distance between the third U-shaped parasitic strip and the fourth U-shaped parasitic strip is set to be 1mm, so that the mutual coupling sum between the first U-shaped parasitic strip and the second U-shaped parasitic strip is reduced to be minimum, and the mutual coupling between the third U-shaped parasitic strip and the fourth U-shaped parasitic strip is reduced to be minimum;
4) the distance between the first U-shaped parasitic strip and the second U-shaped parasitic strip and the microstrip feeder line is different from the distance between the first U-shaped parasitic strip and the second U-shaped parasitic strip and the microstrip feeder line, so that the coupling between the U-shaped parasitic strips at the two sides of the microstrip feeder line is reduced to the minimum;
5) the coupling among the trapped wave structures is ensured to be minimum by setting the length of the connecting arm of each U-shaped wave trap;
6) the utility model has compact structure and small size, and is convenient to be integrated into communication equipment;
7) the utility model discloses because the coupling between each trapped wave structure is little, can adjust the trapped wave central frequency of independent trapped wave structure through the length of adjusting first arc open loop syntonizer, second arc open loop syntonizer, first type U-shaped parasitic band, second type U-shaped parasitic band, third type U-shaped parasitic band or fourth type U-shaped parasitic band alone, can not cause the influence to the trapped wave central frequency of other trapped wave structures simultaneously, need not push away the weight with whole design, the easier design, adaptability is better;
8) the utility model discloses because the coupling between each trapped wave structure is little, arbitrary trapped wave structure out of tolerance can not lead to the trapped wave central frequency change of all the other trapped wave structures during manufacturing, consequently makes the required relatively lower of precision, makes the degree of difficulty also lower.
Drawings
Fig. 1 is a perspective view of the present invention;
fig. 2 is an antenna current distribution diagram of the present invention under 3.00GHz simulated by HFSS15.0 software;
fig. 3 is an antenna current distribution diagram of the present invention under 3.80GHz simulated by HFSS15.0 software;
fig. 4 is an antenna current distribution diagram of the present invention under 4.48GHz simulated by HFSS15.0 software;
fig. 5 is an antenna current distribution diagram of the present invention under 4.88GHz simulated by HFSS15.0 software;
fig. 6 is an antenna current distribution diagram of the present invention under 5.77GHz simulated by HFSS15.0 software;
fig. 7 is an antenna current distribution diagram of the present invention under 7.06GHz simulated by HFSS15.0 software;
fig. 8 is an antenna current distribution diagram of the present invention under 7.92GHz simulated by HFSS15.0 software;
fig. 9 is a return loss curve simulated by HFSS15.0 software according to the present invention;
fig. 10 is a voltage standing wave ratio curve simulated by HFSS15.0 software according to the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments:
example 1 was carried out: referring to fig. 1, a seven-notch microstrip antenna with an added U-shaped slot embedded in an open-loop slot includes: a dielectric substrate 5; the metal grounding surface 6, the metal grounding surface 6 covers the lower surface of the dielectric substrate 5; the radiation patch 1 is covered on the upper surface of a dielectric substrate 5, the radiation patch 1 is symmetrical left and right by taking a vertical central axis of the dielectric substrate 5 as a central axis, the radiation patch 1 is made of metal, a first arc-shaped open-loop resonator 2 is arranged in the radiation patch 1, a second arc-shaped open-loop resonator 3 is arranged on the radiation patch 1 in the first arc-shaped open-loop resonator 2, and a third arc-shaped open-loop resonator 4 is arranged on the radiation patch 1 in the second arc-shaped open-loop resonator 3; the microstrip feeder line 9 is covered on the upper surface of the dielectric substrate 5, the upper end of the microstrip feeder line 9 is electrically connected with the radiation patch 1, the central axis of the microstrip feeder line 9 is superposed with the vertical central axis of the dielectric substrate 5, the upper part and the lower part of the left side of the microstrip feeder line 9 are respectively provided with a first U-shaped parasitic band 10 and a second U-shaped parasitic band 11, and the upper part and the lower part of the right side of the microstrip feeder line 9 are respectively provided with a third U-shaped parasitic band 7 and a fourth U-shaped parasitic band 8; the first arc-shaped open-loop resonator 2 and the second arc-shaped open-loop resonator 3 are different in shape, and the second arc-shaped open-loop resonator 3 and the third arc-shaped open-loop resonator 4 are different in shape; the distance between the lower edge of the first U-shaped parasitic band 10 and the upper edge of the second U-shaped parasitic band 11 is 0.9 mm; the distance between the lower edge of the third U-shaped parasitic strip 7 and the upper edge of the fourth U-shaped parasitic strip 8 is 1 mm; the distance between the first U-shaped parasitic strip 10 and the second U-shaped parasitic strip 11 and the microstrip feeder line 9 is different from the distance between the first U-shaped parasitic strip 10 and the second U-shaped parasitic strip 11 and the microstrip feeder line 9; the length of the first U-shaped parasitic band connecting arm 102 is 6.1 mm; the length of the second U-shaped parasitic band connecting arm 112 is 6.6 mm; the length of the third type of U-shaped parasitic band connecting arm 702 is 6.5 mm; the length of the fourth type of U-shaped parasitic strip connection arm 802 is 6.5 mm.
The radiation patch 1 is a sheet made of metal, the first arc-shaped open-loop resonator 2, the second arc-shaped open-loop resonator 3 and the third arc-shaped open-loop resonator 4 are arc-shaped slots formed in the radiation patch 1, the arc-shaped slots are open loops, and two ends of each arc-shaped slot are not communicated. The first U-shaped parasitic strip 10, the second U-shaped parasitic strip 11, the third U-shaped parasitic strip 7 and the fourth U-shaped parasitic strip 8 are sheets made of metal materials. The metal ground plane 6 is a thin plate made of metal. The microstrip feeder 9 is a thin sheet made of metal. The utility model discloses utilize printed circuit board technology or integrated circuit technology to obtain on medium base plate 5 the sculpture.
The length of each open loop resonator and each U-like parasitic strip is determined by the following equation:
where c is the speed of light, fnotchTo trap the center frequency, deltareffIs an effective dielectric constant, δrIs the dielectric constant of the substrate, h is the thickness of the substrate, ωfThe width of the microstrip line is L, and the length of each open-loop resonator or each U-shaped parasitic strip is L.
When the trap device works, 7 trap waves are realized through the first arc-shaped open-loop resonator 2, the second arc-shaped open-loop resonator 3, the third arc-shaped open-loop resonator 4, the first U-shaped parasitic band 10, the second U-shaped parasitic band 11, the third U-shaped parasitic band 7 and the fourth U-shaped parasitic band 8, namely, the trap function can be realized on narrow band signals of 7 frequency bands simultaneously; the shapes of the first arc-shaped open-loop resonator 2 and the second arc-shaped open-loop resonator 3 are different, so that the shapes of the second arc-shaped open-loop resonator 3 and the third arc-shaped open-loop resonator 4 are different, and strong coupling influence generated between two adjacent resonators with similar shapes is avoided; the distance between the first U-shaped parasitic strip 10 and the second U-shaped parasitic strip 11 is set to be 0.9mm, and the distance between the third U-shaped parasitic strip 7 and the fourth U-shaped parasitic strip 8 is set to be 1mm, so that the mutual coupling sum between the first U-shaped parasitic strip 10 and the second U-shaped parasitic strip 11 is reduced to the minimum, and the mutual coupling between the third U-shaped parasitic strip 7 and the fourth U-shaped parasitic strip 8 is reduced to the minimum; the distance between the first U-shaped parasitic strip 10 and the second U-shaped parasitic strip 11 and the microstrip feeder line 9 is different from the distance between the first U-shaped parasitic strip 10 and the second U-shaped parasitic strip 11 and the microstrip feeder line 9, so that the coupling between the U-shaped parasitic strips at two sides of the microstrip feeder line 9 is reduced to the minimum; the coupling among the trapped wave structures is ensured to be minimum by setting the length of the connecting arm of each U-shaped wave trap; the utility model has compact structure and small size, and is convenient to be integrated into communication equipment; the utility model discloses because the coupling between each trapped wave structure is little, can adjust the trapped wave central frequency of independent trapped wave structure through the length of adjusting first arc open-loop resonator 2 alone, second arc open-loop resonator 3, third arc open-loop resonator 4, the parasitic area of first type U-shaped 10, the parasitic area of second type U-shaped 11, the parasitic area of third type U-shaped 7 or the parasitic area of fourth type U-shaped 8, can not cause the influence to the trapped wave central frequency of other trapped wave structures simultaneously, need not push away the weight to whole design, design more easily, adaptability is better; the utility model discloses because the coupling between each trapped wave structure is little, arbitrary trapped wave structure out of tolerance can not lead to the trapped wave central frequency change of all the other trapped wave structures during manufacturing, consequently makes the required relatively lower of precision, makes the degree of difficulty also lower.
The length of the connecting arm of each U-shaped trap filter is set so as to ensure the minimum coupling among the trap structures. To verify the effect of different length connecting arms on the coupling of each trap, the return loss S11 and the frequency curve of the different length connecting arm antenna were simulated using HFSS 15.0. The results show that the coupling with other notch structures is minimal when the length of the first type of U-shaped parasitic strip connecting arm 102 is 6.1mm, and the coupling with other notch structures is minimal when the optimal length of the second type of U-shaped parasitic strip connecting arm 112 is 6.6 mm; the coupling with other notch structures is minimum when the optimal length of the third type U-shaped parasitic strip connecting arm 702 is 6.5 mm; the optimal length of the fourth type of parasitic strip connecting arm 802 is 6.5mm with minimal coupling to other notch structures. And the return loss S11< -10dB and the voltage standing wave ratio VSWR of the antenna in the frequency band of 2.8GHz-12GHz are less than 2, and the return loss S11< -5dB and the voltage standing wave ratio VSWR of the antenna in the frequency bands of 2.95 GHz-3.31 GHz, 3.75 GHz-3.84 GHz, 4.36 GHz-4.44 GHz, 4.59 GHz-4.77 GHz, 5.60 GHz-5.83 GHz, 6.93 GHz-7.19 GHz and 7.65 GHz-8.04 GHz are more than 12, so that the antenna has good trap characteristics.
Further, the radiation patch 1 is elliptical; the first arc-shaped open-loop resonator 2 is in an ellipse shape similar to the radiation patch 1, the long axis of the first arc-shaped open-loop resonator 2 is overlapped with the long axis of the radiation patch 1, and the short axis of the first arc-shaped open-loop resonator 2 is overlapped with the short axis of the radiation patch 1.
The elliptical shape of the first arc-shaped open-loop resonator 2 and the radiating patch 1 is similar to each other, which means that the two elliptical shapes have the same eccentricity but different magnitudes. The first arc open-loop resonator 2 and the radiation patch 1 generate strong trap resonance frequency, so that the return loss of the frequency band corresponding to the first arc open-loop resonator 2 is increased, the voltage standing wave ratio is increased, and the trap characteristic of the corresponding frequency band is enhanced.
Further, the second arc-shaped open-loop resonator 3 is circular, and the center of the second arc-shaped open-loop resonator 3 coincides with the center of the radiation patch 1.
This has the effect of avoiding strong mutual coupling of the first arc open loop resonator 2 and the second arc open loop resonator 3 due to similarity of patterns.
Further, the third arc-shaped open-loop resonator 4 is an ellipse, a long axis of the third arc-shaped open-loop resonator 4 coincides with a long axis of the radiation patch 1, and a short axis of the third arc-shaped open-loop resonator 4 coincides with a short axis of the radiation patch 1.
This has the effect of avoiding strong mutual coupling of the third arc-shaped open loop resonator 4 and the second arc-shaped open loop resonator 3 due to similarity of patterns.
Further, Roggers5880 is adopted as the material of the dielectric substrate 5, and the thickness is 0.8 mm; the width of the microstrip feeder line 9 is 1.9mm, the length of the microstrip feeder line is 20.2mm, and the resistance of the microstrip feeder line is 50 omega; the long axis of the radiation patch 1 is 10mm, and the short axis of the radiation patch 1 is 8 mm; the arc length of the notch of the first arc-shaped open-loop resonator 2 is 4mm, and the length of the first arc-shaped open-loop resonator 2 is 43.6 mm; the arc length of the notch of the second arc-shaped open-loop resonator 3 is 3mm, and the length of the second arc-shaped open-loop resonator 3 is 33.4 mm; the arc length of the notch of the third arc-shaped open-loop resonator 4 is 2.4mm, and the length of the third arc-shaped open-loop resonator 4 is 29.77 mm; the total length of the first type of U-shaped parasitic strip 10 is 17.5 mm; the total length of the second U-shaped parasitic band 11 is 25.1 mm; the total length of the third U-shaped parasitic band 7 is 15.5 mm; the total length of the fourth type of U-shaped parasitic strip 8 is 20.5 mm.
Roggers5880 is adopted as a material of the dielectric substrate 5, the thickness is 0.8mm, the length is 40mm, and the width is 38 mm; the width of the microstrip feeder line 9 is 1.9mm, the length is 20.2mm, and the resistance is 50 omega to realize impedance matching.
The notch arc length of the first arc-shaped open-loop resonator 2 is set to be 4mm, and the length of the first arc-shaped open-loop resonator 2 is set to be 43.6mm, so that the first arc-shaped open-loop resonator 2 generates a trapped wave characteristic to a 2.96-3.33GHz frequency band;
the notch arc length of the second arc-shaped open-loop resonator 3 is set to be 3mm, and the length of the second arc-shaped open-loop resonator 3 is set to be 33.4mm, so that the second arc-shaped open-loop resonator 3 generates a notch characteristic for a 3.73-3.88GHz frequency band;
the notch arc length of the third arc-shaped open-loop resonator 4 is set to be 2.4mm, and the length of the third arc-shaped open-loop resonator 4 is set to be 29.77mm, so that the third arc-shaped open-loop resonator 4 generates a notch characteristic for a 4.36-4.44GHz frequency band;
the total length of the first U-shaped parasitic strip 10 is set to be 17.5mm, so that the first U-shaped parasitic strip 10 generates a notch characteristic on a 6.93-7.19GHz frequency band;
the total length of the second U-shaped parasitic band 11 is set to be 25.1mm, so that the second U-shaped parasitic band 11 generates a notch characteristic for a 4.59-4.77GHz frequency band;
the total length of the third U-shaped parasitic band 7 is set to be 15.5mm, so that the third U-shaped parasitic band 7 generates a notch characteristic on a 6.93-7.19 frequency band;
by setting the total length of the fourth type U-shaped parasitic strip 8 to be 20.5mm, the fourth type U-shaped parasitic strip 8 generates a notch characteristic on a 5.60-5.83GHz frequency band.
Further, the width of the first arc-shaped open-loop resonator 2 is 0.5mm, the width of the second arc-shaped open-loop resonator 3 is 0.4mm, and the width of the third arc-shaped open-loop resonator 4 is 0.3 mm; the width of the first type of U-shaped parasitic strip 10, the second type of U-shaped parasitic strip 11, the third type of U-shaped parasitic strip 7 and the fourth type of U-shaped parasitic strip 8 is 0.5 mm.
The coupling of each notch structure under the condition of different widths is simulated through HFSS15.0, the return loss S11< -10dB and the voltage standing wave ratio VSWR <2 are ensured to be within the frequency band of 2.8GHz-12GHz except the notch frequency band (namely the frequency band needing filtering), the surface currents of the notch structures at different notch frequencies are respectively concentrated on different notch structures through setting the parameters, and the coupling of each notch structure on the surface is minimum under the parameters.
Further, the distance between the second type U-shaped parasitic strip 11 and the lower edge of the dielectric substrate 5 is 3.5mm, and the distance between the fourth type U-shaped parasitic strip 8 and the lower edge of the dielectric substrate 5 is 5.9 mm.
Because the antenna is installed at a position with a possible electric conductor, in order to avoid the coupling caused by the fact that the distance between the second U-shaped parasitic strip 11 and the electric conductor is too close to the fourth U-shaped parasitic strip 8, the distance between the second U-shaped parasitic strip 11 and the lower edge of the dielectric substrate 5 is set to be 3.5mm, and the distance between the fourth U-shaped parasitic strip 8 and the lower edge of the dielectric substrate 5 is set to be 5.9mm, so that the coupling of the antenna and the nearby electric conductor is minimum under the condition that the impedance matching and the size of the antenna are small enough.
Further, the distance between the first U-shaped parasitic strip 10 and the microstrip feed line 9 is 0.55mm, the distance between the second U-shaped parasitic strip 11 and the microstrip feed line 9 is 0.55mm, the distance between the third U-shaped parasitic strip 7 and the microstrip feed line 9 is 0.35mm, and the distance between the fourth U-shaped parasitic strip 8 and the microstrip feed line 9 is 0.35 mm.
The curve between the return loss S11 and the frequency of the similar U-shaped trapped wave structure and the microstrip feeder line 9 with different distances is simulated by adopting HFSS15.0, and when the coupling is verified to be minimum, the distance between the first U-shaped parasitic band 10 and the microstrip feeder line 9 is 0.55mm, the distance between the second U-shaped parasitic band 11 and the microstrip feeder line 9 is 0.55mm, the distance between the third U-shaped parasitic band 7 and the microstrip feeder line 9 is 0.35mm, and the distance between the fourth U-shaped parasitic band 8 and the microstrip feeder line 9 is 0.35 mm.
The antenna current profiles as shown in fig. 2-8 were obtained by simulation with HFSS15.0 three-dimensional electromagnetic simulation software, which shows that,
1) for the center frequency of 3.00GHz, the surface current generated by resonance on the antenna is mainly concentrated near the first arc open-loop resonator 2, and the electromagnetic energy generated by resonance of corresponding frequency bands at the positions cannot be radiated outwards;
2) for the center frequency of 3.80GHz, the surface current generated by resonance on the antenna is mainly concentrated near the second arc open-loop resonator 3, and the electromagnetic energy generated by resonance at the places of the corresponding frequency bands cannot radiate outwards;
3) for a center frequency of 4.48GHz, surface currents generated by resonance on the antenna are mainly concentrated near the third arc open-loop resonator 4, and electromagnetic energy generated by resonance at the places of corresponding frequency bands cannot be radiated outwards;
4) for a center frequency of 4.88GHz, the surface current generated by resonance on the antenna is mainly concentrated near the second U-shaped parasitic band 11, and electromagnetic energy generated by resonance of corresponding frequency bands cannot radiate outwards;
5) for the center frequency of 5.77GHz, the surface current generated by resonance on the antenna is mainly concentrated near the fourth U-shaped parasitic band 8, and the electromagnetic energy generated by resonance of the corresponding frequency band at the positions cannot be radiated outwards;
6) for a central frequency of 7.06GHz, surface currents generated by resonance on the antenna are mainly concentrated near the first U-shaped parasitic band 10, and electromagnetic energy generated by resonance of corresponding frequency bands at the positions cannot be radiated outwards;
7) for a center frequency of 7.92GHz, the surface currents produced by resonance on the antenna are mainly concentrated near the third type U-shaped parasitic strip 7, and electromagnetic energy produced by resonance in the corresponding frequency band cannot radiate outward.
The following conclusions can be drawn:
firstly, the utility model discloses can be to the electromagnetic wave production trapped wave characteristic of seven specific frequency channels of WiMAX wave band ascending frequency (2.96-3.33GHz) and descending frequency (3.73-3.88GHz), INSAT wave band ascending frequency (4.36-4.44GHz) and descending frequency (4.59-4.77GHz), WLAN wave band descending frequency (5.60-5.83GHz) and X wave band ascending (6.93-7.19GHz) and descending frequency (7.65-8.04 GHz);
second, it can be seen that each notch structure corresponds to a notch center frequency, and changing the length of one of the notch structures does not affect the notch center frequencies of the other notch structures.
In order to further test the coupling between the notch structures, the lengths of the single notch structures are respectively and independently changed, and then the simulation is carried out through HFSS15.0 three-dimensional electromagnetic simulation software, so that simulation curves between the return loss S11 and the frequency of the notch structures under different lengths are obtained. The results show that as the length of each notch structure increases, the center frequency of the relevant notch shifts in the high frequency direction, and the center frequencies of the other notch structures hardly change.
FIG. 9 is a return loss curve of the antenna structure, FIG. 10 is a voltage standing wave ratio curve of the antenna, and it can be seen from the graph that the return loss S11< -10dB and the voltage standing wave ratio VSWR <2 of the antenna in the frequency band of 2.8GHz-12GHz cover the frequency range of 3.1 GHz-10.6 GHz. The return loss S11-5 dB and the voltage standing wave ratio VSWR >12 of the antenna in the frequency bands of 2.95-3.31GHz, 3.75-3.84GHz, 4.36-4.44GHz, 4.59-4.77GHz, 5.60-5.83GHz, 6.93-7.19GHz and 7.65-8.04GHz indicate that a large amount of energy in the frequency bands can not be radiated outwards, the antenna has remarkable trap characteristics, and can effectively inhibit seven frequency bands, namely uplink and downlink frequencies of WiMAX wave bands, uplink and downlink frequencies of INSAT wave bands, downlink frequencies of WLAN wave bands and uplink and downlink frequencies of X wave bands.
The notch structure in this patent is to first arc open loop resonator 2, second arc open loop resonator 3, third arc open loop resonator 4, first type U-shaped parasitic band 10, second type U-shaped parasitic band 11, third type U-shaped parasitic band 7 or fourth type U-shaped parasitic band 8, and similar U-shaped notch structure means the general name of first type U-shaped parasitic band 10, second type U-shaped parasitic band 11, third type U-shaped parasitic band 7 or fourth type U-shaped parasitic band 8.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (8)
1. A seven trapped wave microstrip antenna with an added U-shaped groove embedded into an open-loop groove, which is characterized by comprising:
a dielectric substrate (5);
the metal grounding surface (6), the metal grounding surface (6) covers the lower surface of the dielectric substrate (5);
the radiation patch (1) covers the upper surface of the dielectric substrate (5), the radiation patch (1) is symmetrical left and right by taking a vertical central axis of the dielectric substrate (5) as a central axis, the radiation patch (1) is made of metal, a first arc-shaped open-loop resonator (2) is arranged in the radiation patch (1), a second arc-shaped open-loop resonator (3) is arranged on the radiation patch (1) in the first arc-shaped open-loop resonator (2), and a third arc-shaped open-loop resonator (4) is arranged on the radiation patch (1) in the second arc-shaped open-loop resonator (3); the antenna comprises a micro-strip feeder line (9), wherein the micro-strip feeder line (9) covers the upper surface of a dielectric substrate (5), the upper end of the micro-strip feeder line (9) is electrically connected with a radiation patch (1), the central axis of the micro-strip feeder line (9) is superposed with the vertical central axis of the dielectric substrate (5), the upper part and the lower part of the left side of the micro-strip feeder line (9) are respectively provided with a first U-shaped parasitic strip (10) and a second U-shaped parasitic strip (11), and the upper part and the lower part of the right side of the micro-strip feeder line (9) are respectively provided with a third U-shaped parasitic strip (7) and a fourth U-;
the first arc-shaped open-loop resonator (2) and the second arc-shaped open-loop resonator (3) are different in shape, and the second arc-shaped open-loop resonator (3) and the third arc-shaped open-loop resonator (4) are different in shape;
the distance between the lower edge of the first U-shaped parasitic strip (10) and the upper edge of the second U-shaped parasitic strip (11) is 0.9 mm;
the distance between the lower edge of the third U-shaped parasitic strip (7) and the upper edge of the fourth U-shaped parasitic strip (8) is 1 mm;
the distance between the first U-shaped parasitic strip (10) and the second U-shaped parasitic strip (11) and the microstrip feeder line (9) is different from the distance between the first U-shaped parasitic strip (10) and the second U-shaped parasitic strip (11) and the microstrip feeder line (9);
the length of the first U-shaped parasitic band connecting arm (102) is 6.1 mm;
the length of the second U-shaped parasitic band connecting arm (112) is 6.6 mm;
the length of the third U-shaped parasitic band connecting arm (702) is 6.5 mm;
the length of the connecting arm (802) of the fourth type of U-shaped parasitic band is 6.5 mm.
2. The seven-notch microstrip antenna with U-shaped slots embedded in open-loop slots according to claim 1,
the radiation patch (1) is elliptical;
the first arc-shaped open-loop resonator (2) is in an oval shape similar to the radiation patch (1), the long axis of the first arc-shaped open-loop resonator (2) is overlapped with the long axis of the radiation patch (1), and the short axis of the first arc-shaped open-loop resonator (2) is overlapped with the short axis of the radiation patch (1).
3. The seven-notch microstrip antenna with U-shaped slots embedded in open-loop slots of claim 2,
the second arc-shaped open-loop resonator (3) is circular, and the center of the second arc-shaped open-loop resonator (3) is superposed with the circle center of the radiation patch (1).
4. The seven-notch microstrip antenna with U-shaped slots embedded in open-loop slots according to claim 3,
the third arc-shaped open-loop resonator (4) is oval, the long axis of the third arc-shaped open-loop resonator (4) is coincided with the long axis of the radiation patch (1), and the short axis of the third arc-shaped open-loop resonator (4) is coincided with the short axis of the radiation patch (1).
5. The seven-notch microstrip antenna with U-shaped slots embedded in open-loop slots according to claim 4,
the dielectric substrate (5) is made of Roggers5880, the thickness is 0.8mm, the length is 40mm, and the width is 38 mm;
the width of the microstrip feeder line (9) is 1.9mm, the length of the microstrip feeder line is 20.2mm, and the resistance of the microstrip feeder line is 50 omega;
the long axis of the radiation patch (1) is 10mm, and the short axis of the radiation patch is 8 mm;
the arc length of the notch of the first arc-shaped open-loop resonator (2) is 4mm, and the length of the first arc-shaped open-loop resonator (2) is 43.6 mm;
the arc length of the gap of the second arc-shaped open-loop resonator (3) is 3mm, and the length of the second arc-shaped open-loop resonator (3) is 33.4 mm;
the arc length of a gap of the third arc-shaped open-loop resonator (4) is 2.4mm, and the length of the third arc-shaped open-loop resonator (4) is 29.77 mm;
the total length of the first U-shaped parasitic strip (10) is 17.5 mm;
the total length of the second U-shaped parasitic strip (11) is 25.1 mm;
the total length of the third U-shaped parasitic strip (7) is 15.5 mm;
the total length of the fourth U-shaped parasitic strip (8) is 20.5 mm.
6. The seven-notch microstrip antenna with U-shaped slots embedded in open-loop slots according to claim 5,
the width of the first arc-shaped open-loop resonator (2) is 0.5mm, the width of the second arc-shaped open-loop resonator (3) is 0.4mm, and the width of the third arc-shaped open-loop resonator (4) is 0.3 mm;
the widths of the first U-shaped parasitic strip (10), the second U-shaped parasitic strip (11), the third U-shaped parasitic strip (7) and the fourth U-shaped parasitic strip (8) are 0.5 mm.
7. The seven-notch microstrip antenna with U-shaped slots embedded in open-loop slots according to claim 6,
the distance between the second U-shaped parasitic strip (11) and the lower edge of the dielectric substrate (5) is 3.5mm, and the distance between the fourth U-shaped parasitic strip (8) and the lower edge of the dielectric substrate (5) is 5.9 mm.
8. The seven-notch microstrip antenna with U-shaped slots embedded in open-loop slots according to claim 7,
the space between the first U-shaped parasitic strip (10) and the microstrip feeder line (9) is 0.55mm, the space between the second U-shaped parasitic strip (11) and the microstrip feeder line (9) is 0.55mm, the space between the third U-shaped parasitic strip (7) and the microstrip feeder line (9) is 0.35mm, and the space between the fourth U-shaped parasitic strip (8) and the microstrip feeder line (9) is 0.35 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922367887.9U CN210668688U (en) | 2019-12-25 | 2019-12-25 | Seven trapped wave microstrip antenna with U-shaped grooves embedded and sleeved mutually in open-loop groove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922367887.9U CN210668688U (en) | 2019-12-25 | 2019-12-25 | Seven trapped wave microstrip antenna with U-shaped grooves embedded and sleeved mutually in open-loop groove |
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| CN210668688U true CN210668688U (en) | 2020-06-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970724A (en) * | 2019-12-25 | 2020-04-07 | 贵州民族大学 | Seven trapped wave microstrip antenna structures of type U-shaped groove are add to open loop groove looks nestification |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970724A (en) * | 2019-12-25 | 2020-04-07 | 贵州民族大学 | Seven trapped wave microstrip antenna structures of type U-shaped groove are add to open loop groove looks nestification |
| CN110970724B (en) * | 2019-12-25 | 2023-12-08 | 贵州民族大学 | Seven-notch microstrip antenna structure with open-loop slots mutually nested and U-shaped slots |
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