36results about How to "Increased low elevation gain" patented technology

The invention relates to an antenna technology, and provides a satellite positioning antenna device. Therefore, the requirements of low elevation gain, a good circular polarization axial ratio and high receiving and dispatching isolation are met. The satellite positioning antenna device comprises an upper layer microstrip antenna, an interlayer microstrip antenna, a lower layer microstrip antenna and a PCB, wherein a phase shifting feed network is arranged on the back side of the PCB. A feed probe of the lower layer microstrip antenna, a feed probe of the interlayer microstrip antenna and a coaxial cable fed by the upper layer microstrip antenna are connected with the feed network, a first plated-through hole is formed in the center of the lower layer microstrip antenna, a second plated-through hole is formed in the center of the interlayer microstrip antenna, and the feed probe of the interlayer microstrip antenna is provided with a third plated-through hole in the lower layer microstrip antenna. A dielectric plate of the upper layer microstrip antenna, a dielectric plate of the interlayer microstrip antenna and a dielectric plate of the lower layer microstrip antenna are consistent in diameter and size and different in dielectric constant.

The invention discloses a wide-beam circularly-polarized microstrip antenna loaded with a parasitic ring. The wide-beam circularly-polarized microstrip antenna loaded with the parasitic ring comprises an upper substrate and a lower substrate, wherein fixed columns are arranged between the upper substrate and the lower substrate; a main radiating unit is arranged on the upper surface of the lower substrate; the upper surface of the upper substrate is provided with a parasitic ring patch unit; the bottom surface of the lower substrate is provided with floor; an excitation port is arranged between the main radiating unit and the floor; and the main radiating unit consists of a round patch and a pair of rectangular outer edge protuberances located on the diameter of the round patch. While keeping the good radiation performance of a planar microstrip circularly-polarized antenna, the wide-beam circularly-polarized microstrip antenna loaded with the parasitic ring can simultaneously broaden the lobe width of a perpendicular plane effectively so as to improve low-elevation gain and be convenient to debug; and compared with an existing wide-beam circularly-polarized antenna, the wide-beam circularly-polarized microstrip antenna loaded with the parasitic ring is simpler in structure, smaller in size and lower in weight, therefore, the production cost is lowered and the wide-beam circularly-polarized microstrip antenna is applicable for various small terminal equipment.

A tri-band satellite navigation antenna for a COMPASS, a GPS and a GLONASS comprises three layers of micro-strip antenna bodies, feed coaxial probes, metal clamp plates, strip line mediums, feed networks and a set of metal screws. High-dielectric-constant ceramic mediums are adopted in all the mediums of the three layers of micro-strip antenna bodies so as to reduce the size of the antenna. Circular polarization of the first-layer micro-strip antenna body is realized through the methods of single-point feed and angle cutting on a metal patch, and circular polarization of the second-layer micro-strip antenna body and circular polarization of the third-layer micro-strip antenna body are realized through double-point feed. The number of the feed probes contained in the medium of each layer of micro-strip antenna body is not more than two, so that three ports have better electromagnetic isolation. The set of metal screws is arranged around the micro-strip antenna bodies, the metal screws can be used for fixing the metal clamping plates and strip line feed layers, and the metal screws can also expand the lobe width of the antenna. The tri-band three-port antenna has the advantages of being small in size, low in section, wide in lobe, good in low elevation angle gain and axial ratio and high in port insulation degree, and suiting to be used as a satellite navigation terminal receiving antenna.

The invention discloses a wide beam circularly-polarized transceiving shared small satellite antenna, which comprises a circular metal bottom plate, a metal round table, a circular radiator and an electric bridge, wherein the metal round table is a hollow round table, the bottom surface with a large area of the metal round table is fixed at the center of the circular metal bottom plate, the top surface of the metal round table is fixed at the center of the bottom surface of the circular radiator, the diameter of the circular radiator is greater than the diameter of the top surface of the metalround table and is less than the diameter of the circular metal bottom plate, and the electric bridge is arranged inside the metal round table and is fixed to the inner wall of the top surface of themetal round table. According to the wide beam circularly-polarized transceiving shared small satellite antenna, -1dBi gain thereof within a frequency band range can cover a space domain range with apitch angle ranging from -85 to 85 degrees (where 0 degree is on behalf of the antenna axial direction) and an azimuth angle ranging from 0 to 360 degrees; and the wide beam circularly-polarized transceiving shared small satellite antenna has a right-handed circularly-polarized port and a left-handed circularly-polarized port, realizes circularly-polarized transceiving sharing of the antenna, andhas the advantages of small size, light weight, and simple structure and processing technology.

The invention provides a satellite positioning navigation antenna, the working bandwidth of the antenna covers the main satellite navigation frequency range completely, and requirements of broadband work and high / low elevation angle gain are met. The antenna comprises a spiral radiation body, a feed network and an RF socket, the spiral radiation body is in threaded connection with the feed network, the RF socket is fastened to a base plate of the feed network, and an internal conductor of the RF socket is electrically connected with the input end of the feed network. The work frequency range of the antenna can cover the main navigation positioning frequency range from 1164MHz to 1614.5MHz, the relative bandwidth reaches 33%, the antenna is compatible with main satellite navigation positioning systems (including GPS of the USA, GLONASS of Russia, GALILEO of the EU, and Beidou of China) in the globe, compared with a routine microstrip navigation positioning antenna at present, the low elevation angle gain is improved substantially, and the antenna of the invention can serve as a multi-mode broadband navigation positioning antenna of a satellite.

The invention relates to a broadband and high low-elevation gain first-generation beidou satellite navigation transceiver antenna, which comprises two layers of dielectric plates, two coupling round copper sheets and four grounding rectangular copper sheets, wherein an antenna radiation patch is arranged on the lower surface of the upper layer of dielectric plate; a grounding plate is arranged on the upper surface of the lower layer of dielectric plate; a feed network is arranged on the lower surface of the lower layer of dielectric plate; the upper layer of dielectric plate and the lower layer of dielectric plate are fixed through plastic screws; an air layer with a certain length is arranged between the upper layer of dielectric plate and the lower layer of dielectric plate; the coupling round copper sheets are arranged in the air layer and are parallel to the dielectric plates; a feed point is arranged at the circle center of each coupling round copper sheet; the feed points are connected with the feed network through feed probes; the four grounding rectangular copper sheets are respectively attached to the periphery of the antenna; and one side of each grounding rectangular copper sheet is connected with the grounding plate. The broadband and high low-elevation gain first-generation beidou satellite navigation transceiver antenna has the advantages of low profile, large bandwidth, wide wave beam and low cost on the basis of dual-frequency characteristics and can be well applied to beidou navigation terminal equipment.

The invention relates to an antenna installation seat and an antenna, and the antenna installation seat comprises an antenna substrate, a fixed plate, and an annular reflection plate. The antenna substrate is of a bowl-shaped structure, and the edge of the opening of the bowl-shaped structure is fixed with the fixed plate. The annular reflection plate is located on the fixed late and is fixed withthe fixed plate. The antenna reflection plate and the antenna substrate are located on the same side surface of the fixed plate. The interior of the bowl-shaped structure is provided with a feed support seat. Compared with a conventional product technology, the antenna is simple in assembly, is higher in structural consistency, and is higher in low-elevation gain.

The invention discloses a new-type helical antenna. The new-type helical antenna comprises a feeding panel; the feeding panel is provided with a supporting body; an antenna body is attached to the supporting body; the antenna body comprises a circuit board and a plurality of radiating elements; the circuit board is attached to the surface of the supporting body; the plurality of radiating elements arranged in parallel are printed on the circuit board, and the radiating elements are spirally wound on the supporting body to form the helical antenna; and the supporting body is cut along a direction parallel to the feeding panel to obtain a round cutting surface. The new-type helical antenna provided by the invention has the characteristics of being smaller in structure, lighter in quality, simple in production process and good in property.

The present invention discloses a satellite dual-band antenna. The satellite dual-band antenna comprises a high-frequency antenna radiator, a low-frequency antenna radiator, a first probe, a second probe and an antenna pedestal, the high-frequency antenna radiator comprises a first dielectric body and a high-frequency antenna radiation surface being subjected to laser etching at the outer surfaceof the first dielectric body, the low-frequency antenna radiator comprises a second dielectric body and a low-frequency antenna radiation surface being subjected to laser etching at the outer surfaceof the second dielectric body, the bottom portion of the antenna pedestal is connected with a PCB, the upper portion of the antenna pedestal is provided with a cavity, the high-frequency antenna radiator and the low-frequency antenna radiator are stacked in the cavity, the high-frequency antenna radiator is located above the low-frequency antenna radiator, the high-frequency antenna radiator and the low-frequency antenna radiator perform feed through the first probe and the second probe, excitation amplitudes of the first probe and the second probe are the same, and the excitation phase difference of the first probe and the second probe is 90 degrees. The satellite dual-band antenna relates to the technical field of communication, is higher in reliability, is provided with the antenna pedestal, adds antenna pattern beam width and achieves miniaturization.

The invention relates to a BD B1 frequency band satellite navigation terminal antenna and a working method thereof. The antenna comprises a radiation plate and a reflection plate, wherein the centralparts of the radiation plate and the reflection plate are connected with a coaxial line, an upper radiation arm group connected with the inner center of the coaxial line is arranged on the upper sidesurface of the radiation plate, the lower side surface of the radiation plate is provided with a lower radiation arm group staggered 180 DEG with the upper radiation arm group and connected with the outer center of the coaxial line, the upper radiation arm group comprises two upper radiation arms staggered 90 DEG and connected with each other through one inward ends, the lower radiation arm groupcomprises two lower radiation arms staggered 90 DEG and connected with each other through one inward ends, four vertical metal columns distributed in a rectangular shape are further connected betweenthe radiation plate and the reflection plate, and radiation patches corresponding to the vertical metal columns in position in an up-down one-to-one mode are arranged on the lower side surface of theradiation plate. According to the antenna, a coaxial line feeding method is adopted, the upper layer is connected with the inner center of the coaxial line, the lower layer is connected with the outercenter of the coaxial line, a 90-DEG phase difference is generated, the circularly polarized radiation is achieved, the coupling effect is achieved through the short-circuit patch and the radiation arm, and the bandwidth of the antenna can be increased.

The invention relates to a broad beam navigation antenna adopting an electromagnetic band-gap structure and a novel installation method thereof. The method comprises the following steps: firstly, the index parameters of the antenna, such as the working frequency, the standing wave ratio, the gaining, and the like are ensured, a common patch antenna is selected or designed, and the bottom of the common patch antenna is provided with a metal floor with a proper size as a supporting structure; the parameters of the electromagnetic band-gap structure are designed by using HFSS software according to know parameters, and the electromagnetic band-gap structure is made by adopting the prior technology; the center of the electromagnetic band-gap structure is cut into a circular area, and the electromagnetic band-gap structure is pasted on the surface of a metal floor and is solidified by a conductive adhesive so that the surface of the patch antenna is parallel to the surface of the electromagnetic band-gap structure, thereby a board beam navigation antenna which adopts electromagnetic band-gap structure and the novel installation method is completely designed. The antenna made by the invention is a low elevation angle and high gain antenna, the transmission of surface waves is restrained and the low elevation angle gain of the antenna is increased by adopting the electromagnetic bandgap structure and the novel installation method thereof.

A hollow polygonal double-frequency single-layer micro-strip antenna put forward by the invention adopts a hollow polygonal micro-strip radiation mode. Compared with an ordinary micro-strip antenna, the micro-strip antenna can work at two frequencies at the same time and the low-elevation gain thereof is improved significantly under the premise of not increasing the thickness of the antenna. The micro-strip antenna comprises a metal radiation plate, a dielectric substrate and a metal reflection base plate, wherein the metal radiation plate and the metal reflection base plate are respectively arranged on the upper and lower surfaces of the dielectric substrate. The metal radiation plate is a hollow metal radiation plate with the center area being removed, and the geometric shape of the hollow area is a polygon, so that the surface current flows along the edge of the hollow area, and radiation or reception of electromagnetic wave signals of two working frequencies (a high frequency point and a low frequency point) is realized by changing the current path. Coaxial feed points are arranged on the metal radiation plate to connect a feeder and feed in electromagnetic wave signals.

The invention discloses a GPS antenna positioning structure, including a helical antenna group and a PCB. The helical antenna group is welded together with the PCB by ultrasonic welding, the helical antenna group includes a four-arm helical antenna, the single-arm helical antenna is composed of two gradient helixes; the PCB comprises a horizontal substrate and a vertical substrate formed by a Wilkinson phase-shift feed network; the horizontal substrate is provided with a first radio frequency port, a second radio frequency port, a third radio frequency port, and a fourth radio frequency port in matched connection with the helical antenna; and the second radio frequency port and the fourth radio frequency port are connected with 90-DEG phase shifters. The GPS antenna positioning structure has the beneficial effects that in a mode of optimizing the helical arm, wide-band operating performance can be better realized, the antenna beam width is widened, and the low elevation angle gains ofthe antenna are improved.

The invention provides a hollow circular double-band single-layer microstrip antenna, which adopts the hollow circular microstrip radiation mode, and can not only work in two frequency points concurrently without increasing the thickness of the antenna, but also can significantly improve the low elevation gain as compared with the ordinary microstrip antenna. The hollow circular double-band single-layer microstrip antenna comprises a metal radiation plate, a medium substrate and a metal reflective substrate, wherein the metal radiation plate and the metal reflective substrate are respectively arranged on the upper surface and the lower surface of the medium substrate, and the metal radiation plate is a hollow metal radiation plate that excides the center circular area so that the surface current flows along the edge of the hollow area. By changing the current path, radiation can be realized or the electromagnetic signals of the high frequency and low frequency points can be received. The metal radiation plate is provided with coaxial feed points used for connecting with a feeder line, and the electromagnetic wave can be fed in.

The invention relates to the technical field of measurement antennas, in particular to an external high-gain full-band measurement antenna. The external high-gain full-band measurement antenna comprises an upper shell and a lower shell; an arc-shaped flow guide sleeve is jointly connected to the outer sides of the upper shell and the lower shell; a first partition plate is arranged at the upper portion of an inner cavity of the lower shell; an antenna main body is mounted at the upper end of the first partition plate; the lower end of the lower shell is connected with a supporting column; a cylindrical block is arranged on the outer side of the supporting column; a cross groove is formed in an inner cavity of the cylindrical block; the periphery of the outer side of the supporting column is connected with damping springs corresponding to the cross groove in position through first connecting blocks; the damping springs are connected with the cylindrical block through second connecting blocks; the lower ends of the second connecting blocks are connected with supporting rods. The antenna is reasonable in structural design and high in practicability; the waterproof and anti-corrosion performance of the antenna can be improved; and stable damping support can be carried out in an outdoor mountainous area, so that the antenna can be protected.

The invention relates to the technical field of circularly polarized antennas of Beidou systems, in particular to a miniaturized multi-frequency antenna which comprises a circuit board, at least two ceramic antennas which are stacked and have different frequency bands and at least one ceramic antenna which is independently arranged are arranged on the circuit board, and an elastic connecting piece is arranged between a feed needle and a ceramic dielectric layer. The elastic connecting piece comprises an annular inner ring and an annular outer ring, the annular inner ring and the annular outer ring are connected through a connecting end and then spread in a diffusion mode in the axial direction, the annular inner ring is attached to the feed needle, and the annular outer ring is attached to the inner wall of the metal through hole in the ceramic dielectric layer. According to the invention, the low-elevation gain of each frequency band is effectively improved, the damage of the ceramic dielectric layer in the welding process is avoided through the use of the elastic connecting piece, and the elasticity of the elastic connecting piece can cope with the problem of local damage of the joint caused by impact in the use process compared with welding. Meanwhile, the invention further provides a manufacturing method of the miniaturized multi-frequency antenna, and the manufacturing method has the same technical effect.

The invention discloses a wide-beam frequency-reconfigurable printed four-arm spiral navigation antenna which comprises an independent lower spiral body, an independent upper spiral body and an independent parasitic oscillator. The upper spiral body comprises a second dielectric sheet, a second spiral arm printed on the second dielectric sheet, a second short circuit connecting arm printed on the second dielectric sheet and a second mechanical structure for supporting the second dielectric sheet; the lower spiral body comprises a first dielectric sheet, a first spiral arm printed on the first dielectric sheet, a first mechanical structure supporting the first dielectric sheet and a feed probe arranged on the bottom floor. The bottom floor is provided with four probes for feeding, feeding is carried out through the four probes at the bottom, and the circular polarization characteristic of the antenna is achieved by endowing four signals which are equal in amplitude and have the phase difference of 90 degrees in sequence. According to the invention, a single structure covers a global navigation frequency band and broadens a directional diagram wave beam, the gain at a low elevation angle is improved, the anti-interference capability is enhanced, and the antenna has the characteristic of miniaturization when being used as a single-frequency-band antenna.

The invention relates to a UHF waveband satellite communication dual-band circularly polarized antenna device which comprises a reflection cavity. The reflection cavity comprises an antenna floor and floor electric field coupling plates. A microwave dielectric slab is arranged in the reflection cavity, an excitation patch is arranged on the microwave dielectric slab, and a parasitic patch is arranged over the excitation patch. The edge of the parasitic patch is provided with vertically-downward patch electric field coupling plates, and the patch electric field coupling plates are parallel to the floor electric field coupling plates. Gaps exist between the patch electric field coupling plates and the floor electric field coupling plates, and the patch electric field coupling plates and the floor electric field coupling plates are coupled in a staggered mode in the vertical direction. The UHF waveband satellite communication dual-band circularly polarized antenna device is compact in structure, the size of an antenna can be effectively decreased, the wave beam width of the antenna is increased, the weight is low, production is easy, the cost is low, the application range is wide, and safety and reliability are achieved.

The long-sleeve shirt-shaped opening tuning ring low-elevation-angle high-gain Beidou multi-frequency microstrip antenna relates to a multi-frequency microstrip antenna. There is an upper dielectric substrate, a lower dielectric substrate and a metal back cavity; the upper surface of the upper dielectric substrate is provided with an upper layer patch, and the upper layer patch is a circular ring loaded with four symmetrically distributed long-sleeved shirt-shaped openings. Shaped radiation patch, the top and bottom of the circular radiation patch are provided with arc-shaped protrusions, which can widen the impedance bandwidth of the antenna; between the long-sleeved shirt-shaped opening tuning rings, there are holes that can guide the flow of surface currents. T-shaped gap; the upper surface of the lower dielectric substrate is provided with a lower patch, and the lower patch is a circular patch with arc-shaped grooves cut at the left and right ends respectively; the upper patch is compared The patch on the lower layer is placed eccentrically to the right to effectively realize the impedance matching of the single-feed stacked multi-frequency antenna; the metal back cavity is a metal cavity with an inclined reflective surface, which can improve the gain of the antenna at low elevation angles. It can significantly improve the gain of the low elevation angle of the antenna, thereby improving the positioning accuracy of the system.

The invention discloses a beidou buoy antenna capable of improving low elevation gai; the beidou buoy antenna is characterized by comprising an upper-layer antenna radiator, a lower-layer antenna radiator, a feed network circuit board and a frustum metal structural member, wherein the upper-layer antenna radiator, the lower-layer antenna radiator and the feed network circuit board are sequentiallyoverlapped from top to bottom and are arranged on the frustum metal structural member together to form an antenna unit of the frustum structure; the upper-layer antenna radiator and the lower-layer antenna radiator are fixedly connected with the feed network circuit board through tin welding; and each antenna radiator is provided with an independent feeder line and a radio frequency interface. The antenna has the advantages of being wide in beam width, small in loss, light in weight and the like, and is stable and reliable in operation and high in low elevation gain, can be used for beidou first-generation short message communication, and can effectively solve the problem that an existing buoy terminal antenna is relatively narrow in wave beam.

The present invention relates to the technical field of circularly polarized antennas of the Beidou system, in particular to a miniaturized multi-frequency antenna, including a circuit board, which includes at least two ceramic antennas stacked and arranged in different frequency bands and at least one ceramic antenna independently arranged , an elastic connecting piece is arranged between the feed needle and the ceramic dielectric layer, the elastic connecting piece includes an annular inner ring and an annular outer ring, and the annular inner ring and the annular outer ring are connected through the connecting end and then diffused in the axial direction Unfolding, the annular inner ring is attached to the feeder needle, and the annular outer ring is attached to the inner wall of the metal via hole on the ceramic dielectric layer. The invention effectively improves the low elevation gain of each frequency band, and avoids the damage of the ceramic dielectric layer during the welding process through the use of the elastic connecting piece. Compared with welding, the elasticity of the elastic connecting piece can deal with the collision caused by impact during use. The problem of local damage at the connection. At the same time, the present invention also claims the protection of the manufacturing method of the miniaturized multi-frequency antenna, which has the same technical effect.

The invention relates to a broad beam navigation antenna adopting an electromagnetic band-gap structure and a novel installation method thereof. The method comprises the following steps: firstly, the index parameters of the antenna, such as the working frequency, the standing wave ratio, the gaining, and the like are ensured, a common patch antenna is selected or designed, and the bottom of the common patch antenna is provided with a metal floor with a proper size as a supporting structure; the parameters of the electromagnetic band-gap structure are designed by using HFSS software according to know parameters, and the electromagnetic band-gap structure is made by adopting the prior technology; the center of the electromagnetic band-gap structure is cut into a circular area, and the electromagnetic band-gap structure is pasted on the surface of a metal floor and is solidified by a conductive adhesive so that the surface of the patch antenna is parallel to the surface of the electromagnetic band-gap structure, thereby a board beam navigation antenna which adopts electromagnetic band-gap structure and the novel installation method is completely designed. The antenna made by the invention is a low elevation angle and high gain antenna, the transmission of surface waves is restrained and the low elevation angle gain of the antenna is increased by adopting the electromagnetic bandgap structure and the novel installation method thereof.

The present invention discloses a four-armed helical antenna based on a multiple loading structure, comprising a laminated cavity 1, a parasitic ring 2, a "hat-shaped" parasitic structure 3, a double-layer feeding network 4, a reflection floor 5, and a helical antenna assembly 6 . The four-armed helical antenna is installed in the center of the platform 7 . The laminated cavity 1 is the outermost layer of the four-armed helical antenna. Inside the laminated cavity 1, a helical antenna assembly 6, a parasitic ring 2 and a "hat-shaped" parasitic structure 3 are arranged in sequence. Due to the coupling current generated on the surface of the parasitic ring 2 and the "hat-shaped" metal structure 3 of the present invention, part of the radiated energy is directed to the wide-angle direction, so that the low-elevation-angle gain near the horizontal plane of the antenna is increased. The laminated cavity 1 restrains the helical antenna assembly from exciting the coupling current on the surface of the platform 7, thus weakening the influence of the platform 7 on the wide beam radiation pattern of the quadrifilar helical antenna. Therefore, the antenna of the present invention can be used as a ground-end antenna in a satellite-to-ground communication system.

A microstrip antenna using parasitical feed metal columns. The microstrip antenna includes four layers of dielectric plates, a radiating patch, metal floors, an SMP RF connector, a one-to-two power divider of a strip line form, a first feed metal column, a second feed metal column, a first parasitical feed metal column, and a second parasitical feed metal column. The antenna is additionally provided with the parasitical feed metal columns on the basis of a double-feed point circular polarization microstrip antenna, through electromagnetic coupling induction, the parasitical feed metal columns have electromagnetic field energy of a certain amplitude and phase, thereby changing surface current distribution of the microstrip antenna and electromagnetic field distribution between the microstrip antenna and the floors, so as to obtain a radiation pattern in rotational symmetry approximate to a ''four-feed point'' microstrip antenna, and at the same time, low elevation gain is improved, a feed network is simplified, feed loss is reduced, and the envelope size is diminished. The microstrip antenna using the parasitical feed metal columns in the invention is particularly suitable for occasions which have high requirements for miniaturization, rotational symmetry of a pattern and low elevation gain, and has popularization and application value.

A GNSS choke coil antenna based on absorbing material, comprising a multipath suppression plate, a plurality of first absorbing units, an antenna unit, a plurality of second absorbing units and a plurality of third absorbing units, a plurality of first The absorbing units are arranged in a ring along the center of the multipath suppressing board and vertically arranged on the upper surface of the multipath suppressing board; the antenna unit is arranged on the upper surface of the multipath suppressing board and is located in the ring formed by a plurality of first absorbing units ; A plurality of second absorbing units are arranged in a circular arrangement along the center of the multipath suppression plate and are arranged obliquely on the upper surface of the multipath suppression plate; a plurality of third absorbing units are arranged in a circular arrangement along the center of the multipath suppression plate and The plurality of third wave-absorbing units are arranged on the outer peripheral surface of the multi-path suppression plate, and are perpendicular to the plurality of first wave-absorbing units. The GNSS choke coil antenna provided by the present invention not only absorbs most of the multipath signals, but also absorbs most of the surface waves formed at the outer peripheral surface of the multipath suppression plate, reduces the interference of surface waves, and effectively improves the multipath suppression of the antenna. ability.

The invention discloses a wide-beam circularly-polarized microstrip antenna loaded with a parasitic ring. The wide-beam circularly-polarized microstrip antenna loaded with the parasitic ring comprises an upper substrate and a lower substrate, wherein fixed columns are arranged between the upper substrate and the lower substrate; a main radiating unit is arranged on the upper surface of the lower substrate; the upper surface of the upper substrate is provided with a parasitic ring patch unit; the bottom surface of the lower substrate is provided with floor; an excitation port is arranged between the main radiating unit and the floor; and the main radiating unit consists of a round patch and a pair of rectangular outer edge protuberances located on the diameter of the round patch. While keeping the good radiation performance of a planar microstrip circularly-polarized antenna, the wide-beam circularly-polarized microstrip antenna loaded with the parasitic ring can simultaneously broaden the lobe width of a perpendicular plane effectively so as to improve low-elevation gain and be convenient to debug; and compared with an existing wide-beam circularly-polarized antenna, the wide-beam circularly-polarized microstrip antenna loaded with the parasitic ring is simpler in structure, smaller in size and lower in weight, therefore, the production cost is lowered and the wide-beam circularly-polarized microstrip antenna is applicable for various small terminal equipment.

The invention relates to a load resistant microstrip antenna, comprising a radiation piece, a dielectric layer and a grounding layer which are stacked in sequence, wherein the dielectric layer comprises more than two dielectric material layers which are different in dielectric constant; and the dielectric layer comprises a first dielectric material layer contacted with the radiation piece and a second dielectric material layer contacted with the grounding layer, and the dielectric constant of the second dielectric material layer is greater than the dielectric constant of the first dielectric material layer. The load resistant microstrip antenna can improve the low-elevation gain.

The invention discloses a dual-frequency wide-beam microstrip antenna working in an S wave band. The dual-frequency wide-beam microstrip antenna comprises an upper-layer metal radiation patch, an upper-layer dielectric substrate, a metal screw, a lower-layer metal radiation patch, a lower-layer dielectric substrate, a metal boss and a metal reflecting plate, wherein the upper-layer dielectric substrate, the lower-layer dielectric substrate, the metal boss and the metal reflecting plate are sequentially arranged from top to bottom, the metal boss is in a bowl shape, the plane of the bottom of the bowl is fixed to the center of the top surface of the metal reflecting plate in an upside-down mode upwards, reverse current appears in the front top direction of the antenna by changing the length of an emission path of electromagnetic waves, the directional diagram of antenna is enabled to be saddle-shaped consequently, the upper-layer metal radiation patch is adhered to the center of the top surface of the upper-layer dielectric substrate, the lower-layer metal radiation patch is adhered to the center of the top surface of the lower-layer dielectric substrate, and the upper-layer dielectric substrate and the lower-layer dielectric substrate are fixed on the top surface of the metal boss through a plurality of metal screws. According to the invention, the problems of narrow beam and insufficient low-elevation gain of a satellite-borne antenna are solved, and the miniaturization of the antenna is effectively realized.