92 results about "Microstrip feed line" patented technology

The invention relates to a low-profile dual-polarization metasurface filtering antenna applied to Sub-6GHz, which comprises a first dielectric substrate, a metasurface is printed on the upper surface of the first dielectric substrate, a second dielectric substrate is downwards arranged on the upper surface of the first dielectric substrate, a metal floor is clamped between the first dielectric substrate and the second dielectric substrate, a first metalized through hole and a second metalized through hole are formed in the second dielectric substrate, and the first metalized through hole is communicated with the second metalized through hole. A first microstrip feeder line and a second microstrip feeder line are printed on the lower surface of the second dielectric substrate, and the first microstrip feeder line and the second microstrip feeder line intersect vertically. According to the invention, the metasurface structure is introduced, and by means of the metasurface structure, the antenna obtains a relatively wide impedance bandwidth 21.61% and a relatively high gain; under the condition that an extra filter circuit is not introduced, the low-frequency radiation zero point is introduced only by adding the n-shaped branch knot, and the radiation zero point frequency and out-of-band rejection can be adjusted by adjusting related parameters; according to the invention, while high isolation is realized, the cross polarization discrimination rate also exceeds 30dB; the antenna is simple in overall structure, low in manufacturing cost and easy to integrate.

The invention discloses a center feed four-azimuth wave beam reconfigurable antenna, and belongs to the field of radio frequency front-end devices. The antenna is composed of a straight arm, a crank arm, a central square patch, a capacitor loading ring, a shunt feeder line and a composite beam RF MEMS switch loaded at a fracture on the shunt feeder line, the structures are in central symmetry about a feeding point and respectively cover a 90-degree space range, and the feeding structure is connected with the center of a top patch through a microstrip feeder switching metal column. When the MEMS switch on a certain branch feeder line is switched on, current fed in from the center firstly flows to the straight crank arm radiation unit at the near end of the closed switch through the branch and then flows to the radiation unit at the far end, phase lag of the current at the far end is equivalent to superposition of a binary array, deflected wave beams are generated, the deflection angle can reach 50 degrees, the gain is 4.9 dB, and the wave beam width can reach 120 degrees. The structural design in central symmetry can realize the reconfigurability of wave beams in four directions in a space quadrant.

The application discloses a single-port-fed dual-frequency omnidirectional circularly polarized antenna, which comprises two vertically intersecting +45-degree first dielectric substrates and -45-degree second dielectric substrates. The upper surface of the +45-degree first dielectric substrate is printed with two concentric zero-phase-shift magnetic rings, wherein the outer ring is a zero-phase-shift low-frequency magnetic ring, and the inner ring is a zero-phase-shift high-frequency magnetic ring; the upper and lower surfaces of the -45-degree second dielectric substrate are respectively printed with two arms of a dual-frequency dipole, the dual-frequency dipole is composed of a first low-frequency dipole and a first high-frequency dipole and is connected through a metal column. Signals enter from a port, and the first low-frequency dipole arm, the first high-frequency dipole arm and the zero-phase-shift low-frequency magnetic ring and the high-frequency magnetic ring are simultaneously and in-phase excited through two microstrip feed lines printed on the upper and lower surfaces of the -45-degree second dielectric substrate, so that dual-frequency circularly polarized radiation is realized. The designed low-frequency magnetic ring and the high-frequency magnetic ring can realize good omnidirectional radiation of the antenna. The antenna works at two frequency bands of 2.45 GHz and 5.8 GHz, and good omnidirectional circularly polarized radiation is realized.

The application discloses a balanced filter with adjustable attenuation, which realizes the function of adjustable attenuation of the balanced filter, reduces the device size on the basis of not affecting the performance, improves the integration of the device, and has the advantages of simple structure, high economy and high practicability. The balanced filter comprises a dielectric substrate and a graphene nanometer plate. The upper surface of the dielectric substrate is symmetrically provided with microstrip feed line structures on both sides, and the microstrip feed line structures are provided with a microstrip resonance structure. One side of the microstrip resonance structure close to the central axis of the dielectric substrate is connected to one side of the graphene nanometer plate, and the other side of the graphene nanometer plate is connected to a metal sheet. The lower surface of the dielectric substrate is provided with a metal ground plate.

The embodiment of the application provides a magneto-electric monopole antenna unit, a magneto-electric monopole antenna array, an antenna and equipment, and belongs to the technical field of wireless communication. The antenna unit comprises a first dielectric substrate, a monopole radiator, a microstrip feed line, a metal reflector plate, a short-circuit metal column and two ground patches. It generates an electric monopole mode through the monopole radiator excitation, and generates a magnetic monopole mode through the short-circuit metal column, the ground patch and the reflector plate, and the two modes work together to realize wideband radiation and widen the beam width. The coupled currents on the two ground patches produce two pairs of opposite electric field components in the far field and offset each other, thereby realizing low cross polarization. The array composed of multiple units is loaded with a metasurface above, which significantly improves the port isolation by introducing a reflection path opposite in phase to the original coupling path. The application solves the technical problem that it is difficult to simultaneously realize wide-angle scanning, low cross polarization and high isolation in a wide frequency band.

The invention discloses a broadband miniaturized metasurface antenna based on a double-layer planar spiral structure, which comprises a multi-layer stacked structure and specifically comprises four layers of metal structures and three layers of dielectric substrate structures, the four layers of metal structures are respectively a first metasurface layer, a second metasurface layer, a metal ground layer with a coupling gap and a micro-strip feeder line layer; the three layers of dielectric substrates are respectively an upper layer dielectric substrate, a middle layer dielectric substrate and a lower layer dielectric substrate, the dielectric substrates are arranged from top to bottom, and the four layers of metal structures are respectively attached to the surfaces of the corresponding dielectric substrates; a penetrating metal through hole is formed in the upper dielectric substrate and is used for realizing electrical interconnection between the first super-surface layer and the second super-surface layer; the first metasurface layer and the second metasurface layer are both composed of a plurality of nested planar spiral metal patches which are periodically arranged. The overall size of the metasurface antenna can be remarkably reduced, and meanwhile broadband work, high gain and stable edge emission radiation performance are achieved.

The application discloses an antenna unit based on a polarization conversion metasurface, an antenna array and an array antenna, and the antenna unit comprises a unit carrier assembly, a unit function structure and a unit metal grounding surface, wherein the unit carrier assembly adopts a structure of mutual lamination of a flexible dielectric substrate and an aramid honeycomb paper core, which can realize the feature of conforming to the shape of the carrier and has the surface load bearing property of the carrier; the unit function structure comprises a unit microstrip feed line, a unit polarization conversion metasurface, a unit coupling slot and a unit coaxial feed head; the multi-layer base frame and the configuration of multiple groups of unit polarization conversion metasurfaces in different states are used to expand the function of the multifunctional polarization metasurface. The array antenna adopts a modular design idea, has the characteristics of a low profile, light weight and simple structure in the structure, has the electromagnetic stealth and electromagnetic wave transmitting and receiving dual electromagnetic functions in the function, can be conformal to the surface of a complex carrier and has the surface load bearing function, and has the integration of structure and function.

This invention discloses a miniaturized filtered circularly polarized microstrip patch antenna, comprising: an upper dielectric substrate and a lower dielectric substrate; a main radiating patch is printed in the middle region of the upper surface of the upper dielectric substrate; a first rectangular slot is provided on the main radiating patch; unequal-length cross-shaped patches and longitudinal rectangular parasitic patches are printed on the lower surface of the upper dielectric substrate; a short-circuit parasitic patch and a longitudinal grounded microstrip feed line are printed on the upper surface of the lower dielectric substrate; a ground plane is printed on the lower surface of the lower dielectric substrate; a second rectangular slot is formed at the upper left corner of the main radiating patch, and a protruding rectangular protrusion is provided at the upper right corner of the main radiating patch. This invention utilizes the advantages of the patch antenna's low profile and small size to achieve miniaturization, can generate three circularly polarized radiation frequencies to achieve broadband circular polarization performance, and can generate two radiation nulls to achieve bandpass filtering response.

The invention belongs to the field of superconducting receiving, and provides an HTS filter based on a full-wavelength resonator in order to improve the power capacity of the HTS filter, the HTS filter comprises a dielectric substrate, an HTS film is deposited on the first surface of the dielectric substrate, and a grounding metal layer is arranged on the second surface opposite to the first surface; the microstrip resonant structure is formed on the HTS thin film of the dielectric substrate and comprises at least two full-wavelength resonators, the adjacent full-wavelength resonators realize electromagnetic coupling through a gap, and the equivalent electrical length of each full-wavelength resonator is a waveguide wavelength corresponding to the working center frequency of the HTS filter; and the input port and the output port are respectively coupled with the full-wavelength resonator on the outermost side in the micro-strip resonant structure through micro-strip feeder lines. According to the technical scheme, the full-wavelength resonator structure with the equivalent electrical length as the waveguide length is adopted, so that the radio-frequency current can be redistributed along a longer resonance path, and the power capacity of the HTS filter is improved on the premise that the device size and the manufacturing complexity are not remarkably increased.

The application discloses a miniaturized wideband 5G millimeter wave filtering antenna based on a substrate integrated waveguide, which comprises a dielectric substrate, a radiation patch, a driven patch, a metal layer, a metal ground plate, a microstrip feed line, a short-circuit through hole and a microstrip feed line to substrate integrated waveguide structure; the dielectric substrate comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate; the metal layer comprises a planar inverted F antenna metal layer and a substrate integrated waveguide lower surface metal layer; the radiation patch and the planar inverted F antenna metal layer are printed on the upper surface of the first dielectric substrate; the driven patch is printed on the upper surface of the second dielectric substrate; the metal ground plate is printed on the upper surface of the third dielectric substrate and is etched with a rectangular feed gap and a U-shaped gap, and the microstrip feed line, the microstrip feed line to substrate integrated waveguide structure and the substrate integrated waveguide lower surface metal layer are printed on the lower surface of the third dielectric substrate. The application has the advantages of wide frequency band, small size, simple structure, high out-of-band gain suppression level and the like.

The invention belongs to the technical field of microwaves, and particularly relates to a slot line-half-mode SIW composite transmission line for microwave / millimeter wave transmission, which is characterized in that a half-mode SIW structure is arranged in a sandwich structure, and a first metal layer synchronously loads a conical microstrip feeder line and a horn-shaped microstrip feeder line structure; the second metal layer is used as a metal structure with a floor function, and the design mode of additionally loading a slot line and an interdigital capacitor enables the device to realize transmission of an S wave band and a Ka wave band at the same time. Wherein in the S wave band, the horn-shaped micro-strip structure of the first metal layer is used for carrying out coupled feeding on the slot line, and in the Ka wave band, the conical micro-strip structure of the first metal layer is used for directly feeding the half-mode SIW; meanwhile, the second metal layer loads an interdigital capacitor at the tail end of the half-mode SIW to complete filtering, and finally the composite transmission line feed structure supporting synchronous transmission of the half-mode SIW and the slot line is constructed. The machining process is simplified, and the machining cost is reduced.

The invention provides an ultra-wideband transparent antenna, which relates to the technical field of antennas and comprises an antenna radiation patch, a floor and a dielectric substrate, the floor is located on the first end face of the dielectric substrate; the antenna radiation patch is arranged on the second end surface of the dielectric substrate; the dielectric substrate is made of soda-lime glass; the antenna radiation patch comprises a first rectangular unit, a second rectangular unit, a third rectangular unit, a first field-shaped unit, a second field-shaped unit, a first triangular unit and a second triangular unit; the first rectangular unit is connected with the microstrip feeder; a plurality of rectangular grooves are formed in the first rectangular unit; according to the invention, the cooperation of high light transmission, ultra wide band coverage, stability and reliability is realized.

The application discloses a planar dual-circularly polarized antenna based on a quadrature magnetic dipole, and relates to the technical field of dual-circularly polarized antennas. The antenna comprises a first dielectric substrate, a metal ground layer, a second dielectric substrate and a third dielectric substrate which are stacked from top to bottom. The metal ground layer is provided with a first coupling slot and a second coupling slot in the middle. The first dielectric substrate is provided with two first metallized through holes and two second metallized through holes. A first metal strip is connected with the metal ground layer through the two first metallized through holes, and the two first metallized through holes are rotationally symmetrical about the first coupling slot. The position relationship between the second metallized through hole and the second coupling slot is the same as the position relationship between the second metallized through hole and the second coupling slot. The coupling slots and the microstrip feed line are coupled to excite the metallized through holes and the metal strip, and generate right-handed circularly polarized radiation waves or left-handed circularly polarized radiation waves in the direction upwards. The application has the performance advantages of low profile, simple structure and wide axial ratio bandwidth.

The embodiment of the utility model relates to the technical field of antennas, and discloses an antenna unit and communication equipment, the antenna unit comprises a dielectric plate, a radiator, a microstrip feeder line, a first resonance unit, a second resonance unit and a grounding plate, the radiator is provided with a slot, one end of the microstrip feeder line is perpendicular to one side of the dielectric plate, and the other end of the microstrip feeder line is perpendicular to the other side of the dielectric plate. One end of the microstrip feeder line is connected with the antenna, the other end of the microstrip feeder line is connected with the radiator, the microstrip feeder line is provided with a slot unit, the slot unit comprises a first slot branch knot and a second slot branch knot, and the first slot branch knot and the second slot branch knot are connected in a bending manner; and the second resonance unit and the first resonance unit are symmetrically arranged relative to the microstrip feeder. According to the embodiment of the invention, in-band interference can be effectively suppressed.

The application discloses a compact four-mode four-port antenna, and belongs to the antenna field. The compact four-mode four-port antenna comprises a first dielectric substrate, a second dielectric substrate, a metal ground plate and a third dielectric substrate which are sequentially stacked, the upper surface of the first dielectric substrate is provided with a segmented annular metal patch, the upper surface of the second dielectric substrate is provided with a circular metal patch, and the lower surface of the third dielectric substrate is provided with a microstrip feed line and a solder pad. The four-mode four-port antenna further comprises a first metal column, a second metal column and a third metal column, the segmented annular metal patch is electrically connected with the microstrip feed line through the first metal column, the circular metal patch is electrically connected with the microstrip feed line through the second metal column, and the solder pad is electrically connected with the metal ground plate through the third metal column. The circular metal patch is used for realizing three polarized radiation modes, and the segmented annular metal patch is used for realizing a fourth polarized radiation mode, so that the manufacturing demand of miniaturization and integration of communication equipment can be met.

The invention discloses a dielectric mutual-decoupling antenna based on a strip dielectric resonator, and belongs to the technical field of microwave communication. The invention provides a low-profile decoupling antenna scheme without additional components to solve the problems that mutual coupling of an existing closely-arranged dielectric antenna array is deteriorated, and an additional structure needs to be additionally arranged in a traditional decoupling mode, so that an antenna is complex or the profile is increased. The antenna is of a laminated structure and comprises a top-layer double-radiation dielectric patch, a middle strip-shaped dielectric resonator, a slotted metal ground and a centrosymmetric L-shaped microstrip feeder. During working, the top layer excites a half-wavelength electric field, the middle resonator excites a full-wavelength electric field, a weak field region is formed by equal-amplitude and reverse-phase offset, and the feed slot is arranged in the weak field region to realize port decoupling.

The invention provides a broadband millimeter wave packaging antenna. The broadband millimeter wave packaging antenna comprises a feed coupling structure and a radiation structure, the radiation structure comprises a first dielectric layer, a second dielectric layer and a third dielectric layer, the first dielectric layer is provided with a parasitic radiation patch, the parasitic radiation patch comprises a dipole patch and a plurality of parasitic patches, and the plurality of parasitic patches are mutually coupled through microstrip connecting lines; a main radiation patch is arranged between the first dielectric layer and the second dielectric layer, and the main radiation patch is electromagnetically coupled with the parasitic radiation patch through the first dielectric layer; the feed coupling structure comprises a common grounding layer, at least one dielectric layer and a bottom metal layer, a coupling gap is etched in the common grounding layer, a microstrip feeder line is arranged on the bottom metal layer, and the microstrip feeder line performs electromagnetic coupling feed on the radiation structure through the coupling gap. The miniaturized and ultrathin design of the antenna is realized, the antenna is adaptive to a high-density packaging scene, and broadband, high gain and high integration level can be realized at the same time in a limited area.

This invention discloses a single- and dual-band reconfigurable microstrip quasi-Yagi antenna. The antenna includes a dielectric substrate, a coplanar radiating patch, a first director, a second director, a microstrip feed line, and four radio frequency (RF) PIN diodes. The coplanar radiating patch is printed on the front side of the dielectric substrate. RF PIN diodes are respectively disposed between the first and second directors, the main radiating patch of the coplanar radiating patch, and the four parasitic radiating patches. The microstrip feed line is printed on the back side of the dielectric substrate. By reasonably setting the conduction and cutoff of the four PIN diodes, this invention can operate in the n78 or n79 frequency band, or simultaneously operate in both the n78 and n79 frequency bands as a dual-band antenna. This antenna achieves good directional radiation in all operating frequency bands, with stable radiation performance. It is a novel, small-sized, lightweight, low-profile, and small-scattering-cross-section directional antenna.

The application discloses a heart-shaped broadband circularly polarized patch antenna, which comprises a dielectric substrate, a heart-shaped radiation patch, a microstrip feed line and a ground plate. A characteristic mode analysis method suitable for irregular geometric shapes is proposed, that is, a plurality of non-orthogonal characteristic modes are used to realize a broadband circularly polarized antenna. The application has the advantages of simple structure, beauty, compactness, simple feed mode, wide impedance and axial ratio bandwidth, and stable radiation pattern. The new method has clear physical mechanism, simple steps and wide application prospect.

This invention discloses a dual-polarized magnetoelectric dipole array antenna. The array antenna consists of antenna elements and a supporting structure. Multiple antenna elements are arrayed within the supporting structure. Each antenna element includes a radiating structure and a feeding structure. The radiating structure is a multi-layer structure with feeding structures arranged between its layers. The feeding structure employs dual-polarized microstrip feed lines. One side of each of the two microstrip feed lines is bridging and cross-laid on the lower surface of the bottom layer of the radiating structure. The feeding structure also includes two orthogonally arranged H-shaped coupling slots, which are arranged on the upper surface of the bottom layer of the radiating structure. This invention achieves ±45° dual-polarization through H-shaped slot coupling feeding and uses a slot coupling feeding and dual-polarized feed line co-layer design, compressing the antenna profile to 0.12λ0. The operating frequency band covers 3.2–5.36 GHz, the array antenna gain is better than 8 dBi, and the dual-polarization port isolation is better than 23 dB. It can simultaneously meet the requirements of the n78 and n79 frequency bands in 5G communication and is suitable for low-cost, miniaturized 5G base station equipment.

This invention discloses an absorptive microstrip slotted antenna and its filtering and absorption method. The microstrip slotted antenna includes a microstrip feed line, a slotted ground plane, a bandpass filter absorption circuit, and a dielectric substrate. The microstrip feed line is mounted on the upper surface of the dielectric substrate, and the slotted ground plane is mounted on the lower surface of the dielectric substrate. The bandpass filter absorption circuit is disposed on the microstrip feed line and includes a resistor and a resonant circuit connected in parallel. The resonant circuit includes a capacitor and an inductor connected in series. It also includes a feed connector connected to the microstrip feed line. This application achieves anti-reflection performance by using a microstrip line structure to excite the slotted line and connecting a bandpass filter absorption circuit in series at the optimal loading position of the microstrip feed line. This invention has a wide anti-reflection bandwidth, extremely high structural integration, and good antenna radiation performance, making it well-suited for application in the field of wireless communication systems.

The utility model relates to a miniaturized transmit-receive common microstrip antenna unit, which comprises a first dielectric substrate, a second dielectric substrate and metalized via holes, the first dielectric substrate is located above the second dielectric substrate; a radiation metal patch is arranged above the first dielectric substrate, and a grounding metal patch is arranged between the first dielectric substrate and the second dielectric substrate; the upper end of the metalized via hole sequentially penetrates through the second dielectric substrate, the grounding metal patch and the first dielectric substrate and then is connected with the radiation metal patch, and the lower end of the metalized via hole is connected with the microstrip feeder; according to the miniaturized transmit-receive sharing microstrip antenna unit provided by the utility model, the cost is further reduced through two modes of transmit-receive sharing and radiation metal patch hollowing-out, and miniaturization and integration are realized at the same time.

The invention relates to the technical field of antennas, in particular to a dual-band antenna based on a metal patch and a butterfly dielectric, which comprises a feed port, a dielectric substrate, a metal ground plane, a microstrip feeder line, an I-shaped slot, a rectangular metal patch, a triangular metal patch, a rectangular dielectric block and a cross dielectric radiator, according to the dual-band antenna, four groups of triangular metal patches and a cross-shaped medium radiator form a main radiation structure; the rectangular dielectric block is used as an electromagnetic energy conductor and transmits the energy coupled by the I-shaped slot to the radiation structure; the rectangular metal patch restrains electromagnetic energy and improves the radiation efficiency of the antenna. The novel design point is that the metal patch radiation and the medium radiation are combined to generate dual-band radiation, the design can be used in an antenna design system needing dual bands, the advantages of the metal patch radiation and the medium radiation are combined, and the antenna is suitable for more use scenes and requirements.

The utility model provides an antenna and communication equipment. The radiation layer comprises a radiator, a micro-strip feeder line, a first micro-strip resonance unit and a second micro-strip resonance unit. In the first direction, one end of the microstrip feeder line is connected with the radiator. A first space is formed in the side, close to the radiator, of the microstrip feeder line, the radiator comprises a first extending part, and a first gap is formed between the first extending part and the microstrip feeder line. And along the second direction, the first micro-strip resonance unit and the second micro-strip resonance unit are respectively arranged at two sides of the micro-strip feeder line at intervals. And the radio frequency ground layer is arranged on the second surface, and the radio frequency ground layer is coupled with the radiation layer. A first gap is formed between the first extension part and the microstrip feeder line, so that the antenna has an in-band notch characteristic, and the first microstrip resonance unit and the second microstrip resonance unit are arranged on the two sides of the microstrip feeder line at intervals, so that the antenna has an out-of-band high selection characteristic. And in-band notch and out-of-band high selectivity can effectively suppress in-band interference and efficiently utilize spectrum resources.

The application belongs to the field of antenna design, and relates to a metasurface antenna, and specifically provides a wideband high-gain metasurface antenna, which provides a beneficial reference method for the optimized design and performance improvement of the wideband high-gain metasurface antenna, so that the wideband high-gain metasurface antenna can be truly applied to a wireless communication system. The application comprises, from top to bottom, a metasurface structure 1, a first dielectric substrate 2, a metal ground layer 3, a second dielectric substrate 4 and a T-shaped microstrip feed line structure 5. The simple metasurface structure is combined with a microstrip double-slit coupling feed structure, the patch shape of the uniform metasurface structure is skillfully trimmed, the mode current gain is significantly improved, and then multiple lateral radiation modes with high gain are excited. Finally, the antenna has the advantages of wideband high-gain characteristics and low profile. In addition, the antenna structure is simple and convenient to process.

The application discloses a magnetic resonance near-field super-resolution sensing unit with high-order harmonic suppression, comprising a first layer metal patch, a first dielectric substrate arranged in close connection with the first layer metal patch, a second layer metal ground arranged in close connection with the first dielectric substrate, a second dielectric substrate arranged in close connection with the second layer metal ground, and a third layer metal patch arranged in close connection with the second dielectric substrate; the first layer metal patch comprises a first sensing horizontal arm and a second sensing horizontal arm, wherein the first sensing horizontal arm and the second sensing horizontal arm are arranged in parallel and spaced apart, and a subwavelength slit is formed between the first sensing horizontal arm and the second sensing horizontal arm; the third layer metal patch comprises a microstrip feed line and a resonance structure, and the third layer metal patch is a symmetrical structure. According to the application, a good dynamic range and low loss are achieved, and the symmetrical structure can effectively suppress the influence of high-order harmonics and realize wide-spectrum operation.

The invention discloses a balanced-unbalanced duplexer with high-isolation wide-stop-band characteristics. The balanced-unbalanced duplexer comprises an unbalanced single-end port A, a balanced differential port B transmission line, a balanced differential port C transmission line, four sections of inverted-L-shaped coupling feeder lines, a tapped microstrip feeder line, two stepped impedance C-shaped resonators, two bent resonators and a flowerpot-shaped resonator. The balanced differential port B transmission line comprises a port B + transmission line and a port B-transmission line; the balanced differential port C transmission line comprises a port C + transmission line and a port C-transmission line. According to the balance-unbalance duplexer, an extra balun structure is prevented from being cascaded, good isolation between receiving and transmitting channels is achieved, and the excellent stop-band characteristic is achieved. In addition, the balanced-unbalanced duplexer can be realized on a single PCB (Printed Circuit Board), is beneficial to integrated processing, and has a wide application prospect.

The application relates to the technical field of antennas and electromagnetic stealth, and particularly discloses a low-scattering antenna array based on an artificial magnetic conductor structure, which comprises an upper dielectric layer, an air layer and a lower dielectric layer arranged in sequence from top to bottom; a plurality of groups of patch units A and a plurality of groups of patch units B are arranged in an array on the upper surface of the upper dielectric layer; each group of patch units A comprises a plurality of groups of slotted cut patch units arranged periodically and having cut seams; each group of patch units B comprises a plurality of groups of common patch units arranged periodically; an upper microstrip feed line strip is arranged on the upper surface of the lower dielectric layer; a metal floor is arranged on the lower surface of the lower dielectric layer, the metal floor is provided with a lower strip-shaped gap corresponding to the upper microstrip feed line strip and a coaxial cable connected with the upper microstrip feed line strip. The application realizes the radiation and scattering integrated antenna array with wideband radiation performance and wideband low-scattering performance by the mechanism of the artificial magnetic conductor orthogonal reflection screen which utilizes the interference cancellation of reflected wave phase difference.

The application discloses a dual-frequency dual-port directional diagram reconfigurable antenna loaded with a parasitic structure and relates to the technical field of reconfigurable antennas. The antenna comprises a dielectric substrate, two pairs of printed dipole antennas, a feed network and a parasitic structure. The two pairs of printed dipole antennas are orthogonally arranged on the dielectric substrate and are respectively connected to a feed port one and a feed port two. The feed network comprises a central microstrip feed line and a parallel metal strip line. The parasitic structure is composed of a mixed array of square metal units and isosceles right triangle metal units. Each unit is arranged at equal intervals, the array is symmetrically arranged relative to the printed dipole, and a predetermined coupling interval is maintained between the array and the printed dipole. The application uses two pairs of orthogonally arranged printed dipole antennas for dual-port feeding, realizes azimuth angle plane beam switching, and is flexible in function realization.