High-gain wide-axial-ratio dual-circularly-polarized magnetoelectric dipole antenna

Abstract

The invention provides a high-gain wide-axial-ratio dual-circularly-polarized magnetoelectric dipole antenna, which belongs to the field of antennae and comprises a first radiation metal sheet, a second radiation metal sheet, a dielectric substrate, a floor and a metal block, the dielectric substrate, the floor and the metal block are stacked from bottom to top, and the first radiation metal sheet and the second radiation metal sheet are arranged on the floor in parallel through metal walls respectively. The metal wall is located in the elliptical metal cavity of the metal block and is perpendicular to the floor, the first radiation metal sheets and the second radiation metal sheets are of an axial symmetry structure and respectively comprise a plurality of metal branches which are vertically connected, and the two first radiation metal sheets and the two second radiation metal sheets are distributed in a central symmetry mode relative to the center of the dielectric substrate. A first micro-strip feeder line and a second micro-strip feeder line which are vertical and do not intersect are arranged in a gap between the adjacent metal walls; the first micro-strip feeder line and the second micro-strip feeder line feed through the metal probes respectively; the gain and the axial ratio bandwidth of the dual-circularly polarized magnetoelectric dipole antenna are improved, and the dual-circularly polarized magnetoelectric dipole antenna can be applied to scenes of satellite communication, radar measurement and control and the like.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, in particular to a high-gain, wide-axis-ratio, dual-circular-polarized magnetoelectric dipole antenna. Background Art

[0002] With the rapid development of fields such as satellite communications and radar detection, the demand for high-performance antennas is growing. In various communication applications, dual circularly polarized antennas are widely used in applications requiring omnidirectional signal reception and transmission, such as satellite communications, aerospace, and remote sensing, because they can simultaneously receive and transmit left-hand and right-hand circularly polarized signals, thereby avoiding polarization loss caused by polarization mismatch. Furthermore, circularly polarized antennas excel in suppressing interference from rain and fog and eliminating the Faraday effect.

[0003] However, most current millimeter-wave circularly polarized antennas can only achieve single circular polarization, and their operating environments are limited. Even if dual circular polarization can be achieved, the antenna gain is low or the axial ratio bandwidth is insufficient. Magnetoelectric dipole antennas are a type of antenna with broadband and stable radiation characteristics, suitable for millimeter-wave communication applications. For example, the Chinese invention patent application with publication number CN117728186A, "A Broadband Circularly Polarized Magnetoelectric Dipole Antenna," improves the flow path of the radiation current by providing rectangular slots on the electric dipole and rectangular slots and n-shaped slots on the magnetic dipole, broadens the impedance bandwidth, and uses coupler feeding to increase the axial ratio bandwidth. However, this antenna uses a coupler to realize two signals with a phase difference of 90 degrees to feed the radiator, which can only achieve left-hand circular polarization, and this coupler design is not suitable for millimeter-wave frequency bands that are more sensitive to phase changes. In addition, the antenna uses a vertical structure coupler, which increases the process complexity and is difficult to process. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: how to improve the gain and axial ratio of a dual circularly polarized magnetoelectric dipole antenna.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions: a high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna, the antenna comprising a first radiating metal sheet, a second radiating metal sheet, and a dielectric substrate, a floor, and a metal block stacked from bottom to top, the first radiating metal sheet and the second radiating metal sheet being respectively arranged parallel to the floor through metal walls, the metal walls being located inside the elliptical metal cavity of the metal block and being perpendicular to the floor, the first radiating metal sheet and the second radiating metal sheet being both axially symmetrical structures and respectively comprising a plurality of vertically connected metal branches, the two first radiating metal sheets and the two second radiating metal sheets being respectively centrally symmetrically distributed about the center of the dielectric substrate, the gaps between adjacent metal walls being provided with vertically non-intersecting first microstrip feeders and second microstrip feeders, the first microstrip feeders and the second microstrip feeders being respectively fed through metal probes.

[0006] Beneficial effects: The first radiating metal sheet and the second radiating metal sheet in the antenna of the present invention respectively include multiple vertically connected metal branches, and the multiple metal branches are vertically connected to form a composite path. The current moves and distributes on each broken line arm at different frequencies. Combined with the phase jump generated by multiple folded angles, the adaptive adjustment of the equivalent electrical length with frequency is realized, so that the two orthogonal polarization modes maintain a phase difference of about 90 degrees within a wider frequency band, and a wider axial ratio bandwidth can be achieved; an elliptical metal cavity is opened inside the metal block, and the metal cavity can reflect side radiation to make the main lobe energy more concentrated; and when the size of the elliptical cavity is compatible with the antenna wavelength, it can form a local resonant cavity, couple with the main antenna, improve the radiation efficiency, and thus improve the gain of the antenna. The antenna of the present invention has good application prospects in satellite communications and radar measurement and control.

[0007] Preferably, the first radiating metal sheet and the second radiating metal sheet together constitute an electric dipole of the antenna, and the metal wall and the floor together constitute a magnetic dipole of the antenna.

[0008] Preferably, the first radiating metal sheet includes two "5"-shaped metal sheets connected vertically, and each "5"-shaped metal sheet includes a first branch, a second branch, a third branch, and a fourth branch connected vertically at the head and tail. The second radiating metal sheet includes a fifth branch, a sixth branch, a seventh branch, and an eighth branch connected vertically in sequence. The sixth branch and the seventh branch are vertically intersected at a supplementary angle, and the fifth branch and the eighth branch are vertically intersected at a cut angle, and both the supplementary angle and the cut angle are square.

[0009] Preferably, the metal wall includes two vertically connected rectangular metal sheets, the fourth branch, the sixth branch, and the seventh branch are vertically connected to the tops of the rectangular metal sheets respectively, and the bottoms of the rectangular metal sheets are vertically connected to the floor.

[0010] Preferably, the major axis of the elliptical metal cavity is located on the diagonal line of the floor, and the height of the elliptical metal cavity is greater than the height of the metal wall.

[0011] Preferably, the first microstrip feed line and the second microstrip feed line are respectively in an inverted U shape and there is a gap between the first microstrip feed line, the second microstrip feed line and the metal wall. The first microstrip feed line includes a first metal sheet, a second metal sheet, and a third metal sheet connected head to tail. The second microstrip feed line includes a fourth metal sheet, a fifth metal sheet, and a sixth metal sheet connected head to tail. The fifth metal sheet is bent downward and is located below the second metal sheet. The downward bending angle of the fifth metal sheet is 45 degrees and is symmetrical on the left and right.

[0012] Preferably, the metal probe is arranged on the dielectric substrate and passes through the floor, and the height of the metal probe is greater than the sum of the thicknesses of the dielectric substrate and the floor.

[0013] Preferably, ends of the third metal sheet and the sixth metal sheet are respectively connected to metal probes.

[0014] Preferably, the material of the dielectric substrate is Rogers 5880, with a dielectric constant of 2.2 and a loss angle tanδ of 0.0009.

[0015] Preferably, the dielectric substrate, the floor and the metal block are all square and of equal size with their edges aligned.

[0016] The advantages provided by the present invention are: the antenna structure of the present invention is simple and easy to process. The first microstrip feeder is used to achieve right-hand circular polarization, and the second microstrip feeder is used to achieve left-hand circular polarization, which can realize the switching between the two circular polarizations. The left-hand circular polarization 3dB axial ratio bandwidth is 25.9-34.8GHz, with a relative bandwidth of 29.3%, and the right-hand circular polarization 3dB axial ratio bandwidth is 26.4-34.7GHz, with a relative bandwidth of 27.2%. In most operating frequency bands, the gain is greater than 10dBi. The antenna S parameters: S11 has a -10dB bandwidth of 24.13-36.5GHz, with a relative bandwidth of 40.8%, and S22 has a -10dB bandwidth of 23.88-34GHz, with a relative bandwidth of 35%. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna provided by an embodiment of the present invention;

[0018] Figure 2 A top view of a high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna provided by an embodiment of the present invention;

[0019] Figure 3 A top view of a high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna provided by an embodiment of the present invention;

[0020] Figure 4 A side view of a high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna provided by an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of a first microstrip feed line and a second microstrip feed line in a high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna provided in an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of the S parameters of a high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna provided in an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of axial ratio parameters of a high-gain, wide-axial-ratio, dual-circularly-polarized magnetoelectric dipole antenna provided in an embodiment of the present invention;

[0024] Figure 8A schematic diagram showing how the gain of a high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna varies with operating frequency, provided by an embodiment of the present invention;

[0025] Figure 9 The E-plane and H-plane radiation patterns of the high-gain, wide-axis-ratio, dual-circularly-polarized magneto-electric dipole antenna provided in an embodiment of the present invention at a frequency of 31 GHz;

[0026] In the figure: 1 first radiating metal sheet, 11 first branch, 12 second branch, 13 third branch, 14 fourth branch, 2 second radiating metal sheet, 21 fifth branch, 22 sixth branch, 23 seventh branch, 24 eighth branch, 3 first microstrip feeder, 31 first metal sheet, 32 second metal sheet, 33 third metal sheet, 4 second microstrip feeder, 41 fourth metal sheet, 42 fifth metal sheet, 43 sixth metal sheet, 5 metal probe, 6 metal wall, 7 elliptical metal cavity, 8 floor, 9 dielectric substrate, 10 metal block. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the following describes the technical solutions of the present invention clearly and completely with reference to specific embodiments and the accompanying drawings. It is obvious that the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1 As shown, this embodiment provides a high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna, comprising a first radiating metal sheet 1, a second radiating metal sheet 2, and a dielectric substrate 9, a floor 8, and a metal block 10 stacked in sequence from bottom to top. The first radiating metal sheet 1 and the second radiating metal sheet 2 are respectively arranged in parallel on the floor 8 through a metal wall 6, that is, the first radiating metal sheet 1 and the second radiating metal sheet 2 are respectively parallel to the floor 8, and the metal wall 6 is located inside the elliptical metal cavity 7 of the metal block 10 and perpendicular to the floor 8. The first radiating metal sheet 1 and the second radiating metal sheet 2 are both axially symmetrical structures and respectively include multiple vertically connected metal branches. The antenna of the present invention has two first radiating metal sheets 1 and two second radiating metal sheets 2, and the two first radiating metal sheets 1 and the two second radiating metal sheets 2 are respectively distributed in a centrally symmetrical manner about the center of the dielectric substrate 9. The gaps between adjacent metal walls 6 are provided with vertically non-intersecting first microstrip feed lines 3 and second microstrip feed lines 4, and the first microstrip feed lines 3 and the second microstrip feed lines 4 are respectively fed by metal probes 5.

[0029] In the antenna of the present invention, the first radiating metal plate 1 and the second radiating metal plate 2 together constitute the electric dipole of the antenna, and the metal wall 6 and the floor 8 together constitute the magnetic dipole of the antenna. The first radiating metal plate 1 and the second radiating metal plate 2 respectively include multiple vertically connected metal branches, and the multiple metal branches are vertically connected to form a composite path. At different frequencies, the current moves and distributes on each segment of the broken line arm. Combined with the phase jump generated by multiple angles, the adaptive adjustment of the equivalent electrical length with frequency is realized, so that the two orthogonal polarization modes maintain a phase difference of about 90 degrees within a wider frequency band, and a wider axial ratio bandwidth can be achieved; an elliptical metal cavity 7 is opened inside the metal block 10, and the metal cavity can reflect side radiation to make the main lobe energy more concentrated; and when the size of the elliptical cavity is compatible with the antenna wavelength, it can form a local resonant cavity, couple with the main antenna, improve the radiation efficiency, and thus improve the gain of the antenna.

[0030] The antenna of the present invention comprises two first radiating metal sheets 1 and two second radiating metal sheets 2, resulting in four sets of metal walls 6. Each set of metal walls 6 consists of two rectangular metal sheets of identical size and shape, connected perpendicularly to each other. The four sets of metal walls 6 are also centrally symmetrically distributed about the center point of the dielectric substrate 9. A cross-shaped gap is formed between the four sets of metal walls 6. The first microstrip feed line 3 and the second microstrip feed line 4 are located within this cross-shaped gap. The first microstrip feed line 3 is used to achieve right-hand circular polarization, while the second microstrip feed line 4 is used to achieve left-hand circular polarization. This allows for switching between dual circular polarizations and achieves dual circular polarization transmission and reception characteristics.

[0031] See also Figure 2 The first radiating metal sheet 1 includes two vertically connected "5"-shaped metal sheets, each "5"-shaped metal sheet includes a first branch 11, a second branch 12, a third branch 13, and a fourth branch 14 vertically connected at the head and tail. The second radiating metal sheet 2 includes a fifth branch 21, a sixth branch 22, a seventh branch 23, and an eighth branch 24 vertically connected in sequence. The sixth branch 22 and the seventh branch 23 are vertically intersected at a supplementary angle, and the fifth branch 21 and the eighth branch 24 are vertically intersected at a chamfered angle. Both the supplementary angle and the chamfered angle are square.

[0032] The fourth branch 14 , the sixth branch 22 , and the seventh branch 23 are respectively vertically connected to the top of the metal wall 6 , and the bottom of the metal wall 6 is vertically connected to the floor 8 .

[0033] The following is an explanation of the dimensions of the first radiating metal sheet 1 and the second radiating metal sheet 2: Figure 3The first branch 11 has a length L1 = 1.4 mm, a width W1 = 0.3 mm, and a dimension L8 = 1 mm. The second branch 12 has a length L2 = 1.2 mm. The third branch 13 has a length L3 = 0.66 mm and a dimension L7 = 0.6 mm. The fourth branch 14 has a dimension L6 = 1 mm and a width W2 = 0.365 mm. The intersection of the two fourth branches 14 has a dimension W3 = 0.565 mm. The fifth and eighth branches 21 and 24 both have a length L4 = 1.06 mm and a width W4 = 0.5 mm. The sixth and seventh branches 22 and 23 have a dimension L5 = 0.8 mm. The supplementary angle dimension W5 = 0.4 mm at the intersection of the sixth and seventh branches 22 and 23. The length Lm of the metal wall 6 perpendicular to the sixth and seventh branches 22 and 23 is 1.8 mm.

[0034] See also Figure 1 The elliptical metal cavity 7 is located on the floor 8 and is obtained by hollowing out the inside of the metal block 10 in an elliptical shape. The long axis of the elliptical metal cavity 7 is located on the diagonal of the floor 8, and the height of the elliptical metal cavity 7 is greater than the height of the metal wall 6.

[0035] See also Figure 5 The first microstrip feed line 3 and the second microstrip feed line 4 are respectively in an inverted U shape and there is a gap between the first microstrip feed line 3, the second microstrip feed line 4 and the metal wall 6, see Figure 4 , with the gap k = 0.08 mm. The first microstrip feed line 3 includes a first metal sheet 31, a second metal sheet 32, and a third metal sheet 33 connected end to end. The second microstrip feed line 4 includes a fourth metal sheet 41, a fifth metal sheet 42, and a sixth metal sheet 43 connected end to end. The fifth metal sheet 42 is bent downward and located below the second metal sheet 32. The downward bend angle of the fifth metal sheet 42 is 45 degrees and is bilaterally symmetrical. The fifth metal sheet 42 itself has an axisymmetric structure.

[0036] The first metal sheet 31, the second metal sheet 32, the third metal sheet 33, the fourth metal sheet 41, the fifth metal sheet 42, the sixth metal sheet 43, and the fifth metal sheet 42 are all rectangular metal sheets, and the width D of the rectangle is 0.64 mm. The dimensions of the first microstrip feed line 3 and the second microstrip feed line 4 are described below: Figure 3 and Figure 4The length of the second metal sheet 32 is Fl1 = 2.1 mm, and the projected length of the fifth metal sheet 42 on the floor 8 is Fl2 = 2.6 mm. The distance p between the third and sixth metal sheets 33, 43 and the floor 8 is 0.1 mm. The height of the first metal sheet 31 is Fd1 = 1.86 mm, the height of the third metal sheet 33 is Fh1 = 2.36 mm, the height of the fourth metal sheet 41 is Fh2 = 2.2 mm, and the height of the sixth metal sheet 43 is Fd2 = 1.52 mm. The fifth metal sheet 42 comprises five sequentially connected metal sheets, with relevant dimensions Ft1 = 0.74 mm, Ft2 = 0.66 mm, and Ft3 = 0.4 mm.

[0037] The dielectric substrate 9 has two feed ports at its bottom. The metal probe 5 is positioned within these ports and extends through the floor 8. Signals are fed through these two feed ports, corresponding to the antenna's left-hand circular polarization and right-hand circular polarization modes, respectively. The portion of the metal probe 5 located within the dielectric substrate 9 is filled with different dielectric materials, surrounding the dielectric substrate 9 and between the dielectric substrate 9. The height of the metal probe 5 is greater than the combined thickness of the dielectric substrate 9 and the floor 8, meaning that the metal probe 5 protrudes a certain height above the upper surface of the floor 8. The ends of the third metal sheet 33 and the sixth metal sheet 43 are connected to the metal probe 5, respectively.

[0038] The dielectric substrate 9 is made of Rogers 5880, with a dielectric constant of 2.2 and a loss angle tanδ of 0.0009. The dielectric substrate 9 has a width and length Lg of 14.6 mm and a height H1 of 0.635 mm.

[0039] The dielectric substrate 9, the floor 8 and the metal block 10 are all square and of equal size with their edges aligned. The floor 8 is a metal floor, the height H2 of the metal wall 6 is 2.6 mm, and the height h of the metal probe 5 is 0.87 mm.

[0040] Figure 6 This is a schematic diagram of the S parameters of the high-gain wide-axis ratio dual circularly polarized magnetoelectric dipole antenna of the present invention, wherein the -10dB bandwidth of S11 is 24.13-36.5GHz, the relative bandwidth is 40.8%, and the -10dB bandwidth of S22 is 23.88-34GHz, the relative bandwidth is 35%.

[0041] Figure 7 This is a schematic diagram of the axial ratio parameters of the high-gain, wide-axial-ratio, dual-circularly-polarized magnetoelectric dipole antenna of the present invention. The 3dB axial ratio bandwidth of left-hand circular polarization is 25.9-34.8GHz, and the relative bandwidth is 29.3%; the 3dB axial ratio bandwidth of right-hand circular polarization is 26.4-34.7GHz, and the relative bandwidth is 27.2%.

[0042] Figure 8This is a schematic diagram showing how the gain of the high-gain, wide-axis-ratio, dual-circularly-polarized magnetoelectric dipole antenna of the present invention varies with operating frequency. As can be seen from the figure, within the impedance bandwidth, the left-hand circularly polarized gain in most operating frequency bands exceeds 10 dBi, and the cross-polarization gain is very small.

[0043] Figure 9 This is the E-plane and H-plane radiation pattern of the high-gain, wide-axis-ratio, dual-circularly-polarized magneto-electric dipole antenna of the present invention at a frequency of 31 GHz. As can be seen from the figure, the cross-polarization of the pattern is low, the backlobe suppression is very good, and the gain in the main radiation direction reaches a maximum of 10.5 dBi.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. High-gain, wide-axis-ratio, dual-circular-polarized magneto-electric dipole antenna, characterized by: The antenna includes a first radiating metal sheet, a second radiating metal sheet, and a dielectric substrate, a floor, and a metal block stacked from bottom to top. The first radiating metal sheet and the second radiating metal sheet are respectively arranged parallel to the floor through metal walls. The metal walls are located inside the elliptical metal cavity of the metal block and are perpendicular to the floor. The first radiating metal sheet and the second radiating metal sheet are both axisymmetric structures and respectively include multiple vertically connected metal branches. The two first radiating metal sheets and the two second radiating metal sheets are respectively distributed in a centrally symmetrical manner about the center of the dielectric substrate. The gaps between adjacent metal walls are provided with vertically non-intersecting first microstrip feed lines and second microstrip feed lines. The first microstrip feed lines and the second microstrip feed lines are respectively fed by metal probes.

2. The high-gain, wide-axis-ratio, dual-circular-polarized magnetoelectric dipole antenna according to claim 1, characterized in that: The first radiation metal sheet and the second radiation metal sheet together constitute an electric dipole of the antenna, and the metal wall and the floor together constitute a magnetic dipole of the antenna.

3. The high-gain, wide-axis-ratio, dual-circular-polarized magnetoelectric dipole antenna according to claim 1, wherein: The first radiating metal sheet includes two "5"-shaped metal sheets connected vertically, and each "5"-shaped metal sheet includes a first branch, a second branch, a third branch, and a fourth branch connected vertically at the head and tail. The second radiating metal sheet includes a fifth branch, a sixth branch, a seventh branch, and an eighth branch connected vertically in sequence. The sixth branch and the seventh branch are vertically intersected at a supplementary angle, and the fifth branch and the eighth branch are vertically intersected at a cut angle. Both the supplementary angle and the cut angle are square.

4. The high-gain, wide-axis-ratio, dual-circular-polarized magnetoelectric dipole antenna according to claim 3, characterized in that: The metal wall includes two vertically connected rectangular metal sheets, the fourth branch, the sixth branch and the seventh branch are vertically connected to the top of the rectangular metal sheet respectively, and the bottom of the rectangular metal sheet is vertically connected to the floor.

5. The high-gain, wide-axis-ratio, dual-circular-polarized magnetoelectric dipole antenna according to claim 1, characterized in that: The long axis of the elliptical metal cavity is located on the diagonal line of the floor, and the height of the elliptical metal cavity is greater than the height of the metal wall.

6. The high-gain, wide-axis-ratio, dual-circular-polarized magnetoelectric dipole antenna according to claim 1, characterized in that: The first microstrip feed line and the second microstrip feed line are respectively inverted U-shaped and there is a gap between the first microstrip feed line, the second microstrip feed line and the metal wall. The first microstrip feed line includes a first metal sheet, a second metal sheet, and a third metal sheet connected end to end. The second microstrip feed line includes a fourth metal sheet, a fifth metal sheet, and a sixth metal sheet connected end to end. The fifth metal sheet is bent downward and is located below the second metal sheet. The downward bending angle of the fifth metal sheet is 45 degrees and is bilaterally symmetrical.

7. The high-gain, wide-axis-ratio, dual-circular-polarized magnetoelectric dipole antenna according to claim 1, characterized in that: The metal probe is arranged on the dielectric substrate and passes through the floor. The height of the metal probe is greater than the sum of the thicknesses of the dielectric substrate and the floor.

8. The high-gain, wide-axis-ratio, dual-circular-polarized magnetoelectric dipole antenna according to claim 5, characterized in that: Ends of the third metal sheet and the sixth metal sheet are respectively connected to metal probes.

9. The high-gain, wide-axis-ratio, dual-circular-polarized magnetoelectric dipole antenna according to claim 1, characterized in that: The material of the dielectric substrate is Rogers 5880, with a dielectric constant of 2.2 and a loss angle tanδ=0.0009.

10. The high-gain, wide-axis-ratio, dual-circular-polarized magneto-electric dipole antenna according to claim 1, characterized in that: The dielectric substrate, floor, and metal blocks are all square and equal in size with their edges aligned.

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