CN112103627B - Miniaturized antenna based on coupling radiation double-inverted F/L printed antenna unit - Google Patents
Miniaturized antenna based on coupling radiation double-inverted F/L printed antenna unit Download PDFInfo
- Publication number
- CN112103627B CN112103627B CN202010872488.2A CN202010872488A CN112103627B CN 112103627 B CN112103627 B CN 112103627B CN 202010872488 A CN202010872488 A CN 202010872488A CN 112103627 B CN112103627 B CN 112103627B
- Authority
- CN
- China
- Prior art keywords
- antenna
- inverted
- substrate
- printed
- double
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Abstract
The invention discloses a miniaturized antenna based on a coupling radiation double-inverted F/L printed antenna unit, which comprises an upper substrate and a plurality of vertical substrates, wherein the upper substrate is a substrate with a plurality of radiating holes; the double-inverted F/L antenna unit is printed on the upper layer substrate and the vertical substrate and is used for transmitting ultrahigh frequency signals; the tuning screw is arranged on the upper substrate, is electrically connected with the tail end of the double-inverted-F/L antenna unit and is used for realizing frequency tuning of the antenna; a metal plate disposed directly below the vertical substrate; a lower substrate disposed right below the metal plate; and the feed network is printed on the lower surface of the lower substrate and is used for receiving the ultrahigh frequency signals and generating four-way sequence feed signals with the same amplitude and the sequential phase difference of 90 degrees. The invention meets the application of satellite communication antenna of UHF frequency range aircraft and carrier ship.
Description
Technical Field
The invention relates to the technical field of satellite communication antennas, in particular to an airborne or shipborne satellite communication antenna, and specifically relates to a miniaturized antenna based on a coupling radiation double-inverted-F/L printed antenna unit.
Background
The Ultra High Frequency (UHF) band is also known as the decimetric wave band and is often used in the field of satellite communications. The antenna size of the antenna working in the ultrahigh frequency band is generally larger due to the longer wavelength of the ultrahigh frequency band, so that the miniaturization of the antenna is a key point of the design of the ultrahigh frequency circularly polarized satellite communication antenna, and the requirement of the miniaturization of the antenna is more severe particularly in the application of aircrafts and carrier airships. In the conventional design, most researchers realize the miniaturization design of the antenna by loading a material with a high dielectric constant, but the introduction of the material with the high dielectric constant increases the weight and the cost of the antenna and also affects the radiation performance (antenna gain, radiation pattern, radiation efficiency and the like) of the antenna, so that an antenna designer prefers to realize the miniaturization of the antenna from the structural change.
In a Compact Circularly Polarized Antenna for a microsatellite (S.K. Podic. et al., "A Compact circular Polarized Antenna Using an Array of Folded-short Patches," in IEEE Transactions on Antennas and Propagation, vol.61, No.9, pp.4861-4867, Sept.2013.), the Antenna realizes a miniaturized design of 400MHz band (0.2 lambda0×0.2λ0) The antenna has good circularly polarized radiation performance.
In the prior art VHF/UHF Band Miniaturized Dual-Band Circularly Polarized Antenna (S.Liao and Q.Xue, "Miniaturized VHF/UHF Dual-Band circular Polarized Four-Element Sequential-Rotation Array Antenna Based on alternating applied Antenna Radiation-Coupled Dual-L Antenna Elements," in IEEE Transactions on Antennas volume and Propagation, 66.66, No.9, pp.4924-4929, sept.2018.), the Antenna realizes 0.197 λ by Alternately overlapping and bending Four Dual-L Antenna Elements0×0.197λ0×0.068λ0The good electrical characteristics under the size can meet the application in the field of satellite communication.
In summary, the prior art has the following disadvantages:
1. the introduction of high dielectric constant materials can increase the weight and cost of the antenna and also affect the radiation performance (antenna gain, pattern, radiation efficiency, etc.) of the antenna.
2. The antenna designed by the multilayer patch folding method has a high section, the weight of the antenna is obviously increased due to the superposition of the multiple layers of metal plates, and the antenna does not have the characteristic of light weight.
3. The miniaturized antenna, although small in size, is not mechanically strong enough to meet the application of aircraft and spacecraft.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention provides a miniaturized antenna based on a coupling radiation double-inverted-F/L printed antenna unit. The antenna adopts the bent and folded coupling radiation double F/L printed antenna unit to realize double-frequency resonance, then generates circularly polarized radiation waves with good performance through quaternary sequence feed, and finally realizes the design of a miniaturized double-frequency circularly polarized antenna. The antenna has the characteristics of compact structure, low cost, convenient assembly, light weight, tunable frequency and the like, and can meet the application of satellite communication antennas of aircrafts and carrier airships in UHF frequency bands.
The invention is realized by at least one of the following technical schemes.
A miniaturized antenna based on coupled-radiation dual-inverted-F/L printed antenna elements, comprising:
the device comprises an upper-layer substrate and a plurality of vertical substrates, wherein the vertical substrates are arranged below the upper-layer substrate and are perpendicular to the upper-layer substrate, and the vertical substrates are mutually connected to form a square frame;
the antenna comprises an upper substrate, a vertical substrate, a plurality of double-inverted-F/L antenna units, a plurality of radiating fins and a plurality of radiating fins, wherein each double-inverted-F/L antenna unit comprises a copper strip printed on the upper substrate and the vertical substrate, and is rotationally and symmetrically distributed around the central axis of the square frame and used for transmitting ultrahigh frequency signals;
the tuning screws are arranged on the upper-layer substrate, and each tuning screw is electrically connected with the tuning screw at the tail end of one double-inverted-F/L antenna unit and used for realizing frequency tuning of the antenna;
the metal plate is arranged below the vertical substrate and is parallel to the upper substrate;
the lower substrate is arranged right below the metal plate, and the upper surface of the lower substrate is electrically connected with the lower surface of the metal plate to form a metal grounding surface;
the feed network is printed on the lower surface of the lower substrate and is used for receiving the ultrahigh frequency signals and generating four-way sequence feed signals with the same amplitude and phases with a sequential difference of 90 degrees;
the feeding probes are arranged at the joint of the metal plate and the vertical substrate, are parallel to the vertical substrate, are distributed in a rotational symmetry manner around the central axis of the square frame, and are used for respectively feeding four paths of sequence feeding signals to each double-inverted F/L antenna unit;
and the mounting plate is arranged below the electric network and used for protecting the feed network.
Furthermore, each double-inverted-F/L antenna unit comprises an inverted-L antenna subunit and an inverted-F antenna subunit; the inverted-L antenna subunit and the inverted-F antenna subunit mainly comprise copper strips; the inverted-L antenna subunit and the inverted-F antenna subunit are respectively printed on the inner surface and the outer surface of the vertical substrate.
Furthermore, the inverted-F antenna subunit is a main driving subunit, and the lower end of the inverted-F antenna subunit is electrically connected with the feed probe to form a single-band radiation PIFA antenna.
Further, the L-shaped antenna subunit is guided to the outer surface of the vertical substrate through the metalized through hole and then is bent and folded by 90 degrees.
Further, the feed network comprises:
the input port is arranged on the lower surface of the lower substrate and connected with an SMA connector;
the output ports are arranged on the lower surface of the lower substrate and are rotationally and symmetrically distributed around the central axis of the whole antenna, and the output ports are electrically connected with each feed probe;
the balun converter is arranged on the lower surface of the lower substrate and connected with an input port, and the signal of the input port is divided into two paths of signals with equal amplitude and 180-degree phase difference;
the two 3dB 90-degree hybrid bridges are connected with the balun converter, and two sides of the balun converter are arranged for dividing the two paths of signals with equal amplitude and 180-degree phase difference into four paths of output signals with equal amplitude and 90-degree phase difference in sequence, namely four paths of sequence feed signals; a 3dB 90-degree hybrid bridge is connected with the two output ports;
the resistance value of the two isolation resistors is 50 ohms, and the two isolation resistors are connected with the two 3dB 90-degree hybrid bridges in a one-to-one correspondence manner and used for terminating signals of the two 3dB 90-degree hybrid bridges;
and the transmission line is used for electrically connecting the input port, the output port, the 180-degree balun and the two 3dB 90-degree bridges so as to realize the communication of the whole feed network.
Further, the metal plate and the mounting plate are made of conductive metal media.
Further, the conductive metal medium includes aluminum.
Furthermore, the upper substrate, the vertical substrate and the lower substrate are all PCB circuit boards.
Compared with the prior art, the invention has the beneficial effects that:
according to the embodiments of the present invention, the miniaturized uhf dual-band circularly polarized antenna based on the coupled radiation dual-inverted F/L printed antenna unit has at least the following advantages:
(1) the coupling radiation double-inverted F/L printed antenna unit is bent and folded in a limited space, and the miniaturization of the antenna (0.135 lambda) is realized under the condition of not loading a high dielectric constant material0×0.135λ0×0.054λ0)。
(2) The antenna structure is printed on a single-layer PCB, and then the antenna is integrated by simply assembling a plurality of PCBs, so that the antenna has the characteristics of simple structure, light weight, low cost and the like.
(3) The length of the tuning nut of the antenna unit can be changed to adjust the two resonant frequency points of the antenna, so that the frequency deviation caused by manufacturing and processing processes is corrected, and the requirement required by design is met.
(4) Under the condition of limited antenna size, the antenna provided by the invention has good electrical characteristics, such as gain, radiation efficiency, axial ratio and the like.
Drawings
Fig. 1 is a schematic perspective view of a miniaturized antenna based on a coupled radiation dual-inverted F/L printed antenna unit according to this embodiment;
FIG. 2 is a front view of the miniaturized UHF dual-band circularly polarized antenna based on coupled-radiation dual-inverted-F/L printed antenna elements of FIG. 1;
FIG. 3 is a top view of the miniaturized UHF dual-band circularly polarized antenna based on coupled-radiation dual-inverted-F/L printed antenna elements of FIG. 1;
fig. 4 is a three-dimensional exploded structural view of the miniaturized uhf dual-band circularly polarized antenna based on the coupled radiation dual-inverted F/L printed antenna unit of fig. 1;
fig. 5 is a perspective structural view of a coupled radiation double-inverted F/L printed antenna unit provided in this embodiment;
fig. 6 is a schematic structural diagram of a feeding network provided in the present embodiment;
fig. 7 is a reflection coefficient graph of a miniaturized antenna body (without a feeding network) based on a coupled radiation double-inverted F/L printed antenna unit provided by the present embodiment;
fig. 8 is a radiation pattern of a miniaturized antenna body (without a feeding network) based on a coupled radiation dual-inverted F/L printed antenna unit provided in this embodiment, where the plane angle Φ is 0 °, and the operating frequency is 353 MHz;
fig. 9 is a radiation pattern of a miniaturized antenna body (without a feeding network) based on a coupled radiation dual-inverted F/L printed antenna unit provided in this embodiment, where the planar angle Φ is 0 °, and the operating frequency is 394 MHz;
fig. 10 shows the Z-axis left-hand circular polarization (LHCP) gain of a miniaturized antenna body (without a feeding network) based on coupled-radiation double-inverted-F/L printed antenna elements according to this embodiment;
fig. 11 shows the Z-axis gain right-hand circular polarization (RHCP) gain of a miniaturized antenna body (without a feeding network) based on a coupled-radiation double-inverted-F/L printed antenna unit according to this embodiment;
fig. 12 is a radiation efficiency graph of a miniaturized antenna body (without a feeding network) based on a coupled radiation double-inverted F/L printed antenna unit provided by the present embodiment;
fig. 13 is a low-frequency tuning reflection coefficient graph of a miniaturized antenna body (without a feeding network) based on a coupled radiation double-inverted F/L printed antenna unit provided by the present embodiment;
fig. 14 is a graph of the high-frequency tuning reflection coefficient of a miniaturized antenna body (without a feed network) based on a coupled radiation double-inverted F/L printed antenna unit provided by the present embodiment;
in the figure: the antenna comprises a 1-upper substrate, a 2-vertical substrate, a 3-double inverted F/L antenna unit, a 4-tuning screw, a 5-metal plate, a 6-lower substrate, a 7-feed network, an 8-feed probe, a 9-mounting plate, a 10-inverted L antenna subunit, an 11-inverted F antenna subunit, a 12-copper strip, a 13-metalized via hole, a 14-input port, a 15-output port, a 16-SMA connector, a 17-180-degree balun converter, an 18-3dB 90-degree hybrid bridge, a 19-isolation resistor and a 20-transmission line.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
As shown in fig. 1 to 4, a miniaturized antenna based on a coupled radiation dual-inverted F/L printed antenna unit includes:
an upper substrate 1 disposed at the uppermost of the miniaturized uhf dual-band circularly polarized antenna;
the four vertical substrates 2 are arranged below the upper-layer substrate 1 and are perpendicular to the upper-layer substrate 1, and the four vertical substrates 2 are mutually connected from left to right to form a rectangular frame;
four double inverted F/L antenna units 3, each of which includes a copper strip printed on the upper substrate 1 and the vertical substrate 2, and is rotationally and symmetrically distributed around the central axis of the overall antenna structure, for transmitting an uhf signal, as shown in fig. 1;
the tuning screws 4 are arranged on the upper substrate 1, are electrically connected with the tail ends of the four double-inverted-F/L antenna units 3, and are used for realizing frequency tuning of the antenna;
the metal plate 5 is arranged right below the vertical substrate 2 and is parallel to the upper-layer substrate 1;
a lower substrate 6 disposed directly below the metal plate 5, wherein an upper surface of the lower substrate 6 is electrically connected to a lower surface of the metal plate 5 to form a metal ground plane;
the feed network 7 is printed on the lower surface of the lower substrate 6 and is used for receiving ultrahigh frequency signals and generating four-way sequence feed signals with the same amplitude and phases with a sequential difference of 90 degrees, as shown in fig. 3;
the four feeding probes 8 are arranged at the joint of the metal plate 5 and the vertical substrate 2, are parallel to the vertical substrate 2, are distributed in a rotational symmetry manner around the central axis of the whole antenna structure, and are used for respectively feeding four paths of sequence feeding signals to the four double-inverted-F/L antenna units 3;
and the mounting plate 9 is arranged right below the feed network 7 and used for protecting the feed network 7.
In the above embodiment, the upper substrate 1, the vertical substrate 2, and the lower substrate 6 are all PCB circuit boards, and the metal plate 5 and the mounting plate 9 are made of conductive metal media, such as aluminum or other metals with good conductivity.
A Planar Inverted F Antenna (PIFA) is a widely used miniaturized antenna based on quarter-wave resonance, which produces single frequency radiation, but its impedance bandwidth is generally narrow, and can be improved by increasing the height of the radiating plate and the width of the ground stub. In addition, an additional resonance can be generated by placing a parasitic element near the PIFA antenna, and the length of the PIFA antenna and the parasitic element can be adjusted to achieve dual-band resonance or widen the impedance bandwidth of the antenna. Based on the radiation coupling principle of the PIFA antenna, the double-inverted-F/L antenna unit is used for realizing double-frequency resonance.
As shown in fig. 5, specifically, each of the dual inverted-F/L antenna elements 3 includes an inverted-L antenna sub-element 10 and an inverted-F antenna sub-element 11, and the inverted-L antenna sub-element 10 and the inverted-F antenna sub-element 11 are printed on the inner and outer surfaces of the vertical substrate 2, respectively.
The inverted-L antenna subunit 10 and the inverted-F antenna subunit are mainly composed of a copper strip 12, and the copper strip 12 is extended to the lower surface of the upper substrate 1 by 90-degree bending and folding. In order to facilitate soldering, as shown in fig. 2, before the L-shaped antenna sub-unit 10 is bent and folded, a copper strip 12 is extended to the lower surface of the upper substrate 1 by introducing it to the outer surface of the vertical substrate 2 through a metalized via 13 and then performing 90-degree bending and folding.
In the double-inverted-F/L antenna unit 3, the inverted-F antenna subunit 11 is a main driving subunit, and the lower end of the inverted-F antenna subunit is electrically connected with the feed probe 8 to form a single-band radiation PIFA antenna; and a parasitic inverted-L antenna subunit 10 and the inverted-F antenna subunit 11 are placed in a close distance, so that under the excitation of coupling feed, the parasitic subunit can also generate an additional resonance, thereby realizing dual-frequency resonance. In summary, in order to achieve antenna miniaturization, the inverted-L antenna subunit 10 and the inverted-F antenna subunit 11 are placed by 90-degree bending and folding, and the antenna extends from the vertical substrate 2 to the lower surface of the upper substrate 1, so that the inverted-L antenna subunit 10 and the inverted-F antenna subunit 11 of the antenna, i.e. two radiating subunits, can be compressed in two dimensions simultaneously, the occupied space size is smaller, and the coupling between the antenna units is stronger, thereby achieving the purpose of minimizing the size of the antenna.
The sequence feed can realize circularly polarized radiation of the antenna, and the antenna has good electrical characteristics (such as a radiation pattern, antenna gain, and a circularly polarized axial ratio). As shown in fig. 1, the four double inverted F/L antenna elements 3 shown in fig. 4 are distributed rotationally and symmetrically around the central axis of the whole antenna, and then the four antenna elements (the double inverted F/L antenna elements 3) are respectively excited by four sequential feed signals with equal amplitudes and sequentially 90-degree phase difference, so that a double-frequency circularly polarized radiation wave can be generated, and thus a double-frequency circularly polarized radiation antenna can be realized.
Fig. 6 is a schematic structural diagram of a feed network. As can be seen from fig. 6, the feed network 7 specifically includes:
an input port 14 which is arranged on the lower surface of the lower substrate 6 and is connected with an SMA connector 16;
four output ports 15, which are arranged on the lower surface of the lower substrate 6 and are rotationally and symmetrically distributed around the central axis of the whole antenna, wherein one end of each output port 15 is electrically connected with the four feed probes 8, and the other end of each output port 15 is connected with a 3dB 90-degree hybrid bridge 18;
the balun converter 17 with 180 degrees is arranged on the lower surface of the lower substrate 6, the balun converter 17 is connected with the input port 14, and the signal of the input port 14 is divided into two paths of signals with equal amplitude and 180-degree phase difference;
the two 3dB 90-degree hybrid bridges 18 are connected with the balun converter 17, and are arranged on two sides of the balun converter 17 and used for dividing the two paths of signals with equal amplitude and 180-degree phase difference into four paths of output signals with equal amplitude and 90-degree phase difference in sequence; a 3dB90 degree hybrid bridge 18 is connected with the two output ports 15;
the resistance value of the two isolation resistors 19 is 50 ohms, and the two isolation resistors 19 are connected with the two 3dB 90-degree hybrid bridges 18 in a one-to-one correspondence manner and used for terminating signals of the two 3dB 90-degree hybrid bridges;
and the transmission line 20 is used for electrically connecting the input port 14, the output port 15, the 180-degree balun 17 and the two 3dB 90-degree bridges 18, so that the whole feed network is communicated.
In principle, the feed network 7 is mainly divided into two stages: in the first stage, a signal enters a feed network from the input port 14 and is divided into two paths of signals with the same amplitude and 180-degree phase difference through the 180-degree balun 17; in the second stage, after the two signals of the upper stage are transmitted to the two 3dB 90-degree hybrid bridges 18 through the transmission line 20, the two signals are divided into four output signals with equal amplitude and sequentially 90-degree phase difference, i.e., four serial feed signals, and the output signals are transmitted to the four inverted F antenna sub-units 11 through the four feed probes 8, respectively, so as to excite the driving unit of the antenna to generate dual-frequency circularly polarized radiation waves.
In actual production, manufacturing and processing processes inevitably bring errors, and the originally set resonant frequency is shifted, so that it is necessary to realize frequency tuning of the antenna to save manufacturing cost and shorten a processing period. In the invention, tuning screws 4 are specially inserted into the tail ends of the four double-inverted-F/L antenna units 3, and the effective resonance lengths of the two antenna subunits can be respectively changed by adjusting the lengths of the tuning screws 4, so that the resonance frequency points of the antenna are adjusted, and the antenna has the advantages of simple realization principle and strong operability.
The miniaturized ultrahigh frequency dual-band circularly polarized antenna is mainly applied to satellite communication antennas in UHF frequency bands, the working frequency is set to be 353MHz and 394MHz, in order to facilitate optimization simulation in practical design, the antenna is particularly divided into two parts to be designed, an antenna main body is firstly designed, then a feed network is designed, and finally the antenna main body and the feed network are cascaded to obtain the whole antenna.
Fig. 7 is a reflection coefficient graph of a miniaturized antenna main body (without a feed network) based on a coupled radiation double-inverted F/L printed antenna unit according to an embodiment of the present invention, and it can be seen from the graph that the reflection coefficients of the antenna at the frequency points of 353MHz and 394MHz are both lower than-13 dB, the antenna realizes a good dual-frequency operation mode, and the-6 dB bandwidths are 2.4MHz (352.0 to 354.4MHz) and 5MHz (391.8 to 396.8MHz), respectively.
Fig. 8 and 9 are radiation patterns of a miniaturized antenna body (without a feeding network) based on a coupled radiation dual-inverted-F/L printed antenna unit according to an embodiment of the present invention, where the plane angle Φ is 0 °, and the operating frequencies are 353MHz and 394MHz, respectively. In the figure, the solid line part is a radiation pattern of left-hand circularly polarized radiation wave (LHCP), the dotted line part is a radiation pattern of right-hand circularly polarized wave (RHCP), and the antenna in the embodiment of the present invention is left-hand circularly polarized radiation.
Fig. 10 and 11 show the Z-axis left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP) gains of a miniaturized antenna body (without a feed network) based on a coupled radiation double-inverted-F/L printed antenna unit according to an embodiment of the present invention, where the left-hand circular polarization gain and the right-hand circular polarization gain of the antenna are both higher than 5dBi and lower than-20 dBi at 353MHz and 394MHz of operating frequency points.
Fig. 12 is a radiation efficiency graph of a miniaturized antenna main body (without a feed network) based on a coupled radiation double-inverted F/L printed antenna unit according to an embodiment of the present invention, where at two working frequency points 353MHz/394MHz, the radiation efficiency is higher than 85%, the highest radiation efficiency is near 394MHz, which is about 92%, and the radiation performance is good.
Fig. 13 and 14 are graphs of low-frequency and high-frequency tuning reflection coefficients of a miniaturized antenna body (without a feed network) based on a coupled radiation double-inverted-F/L printed antenna unit provided by the embodiment of the invention, and the length L of the tuning screw 4 is adjusted1And L2The resonant lengths of the two antenna subunits can be changed, so that two resonant frequencies can be respectively adjusted to make up for errors of a processing process and enable the shifted frequency point to return to the designed frequency point again. As can be seen in FIG. 12, the low frequency tuning screw length L1The longer the frequency is, the lower the resonance point of the low frequency is shifted to, the frequency point of the high frequency resonance is hardly affected, and the length L of the high frequency tuning screw is2The same rule is satisfied when the change is made.
The antenna unit consists of coupled radiation double-inverted-F/L antenna sub-units, and a parasitic sub-unit is arranged near the PIFA antenna to generate an extra resonance, so that the dual-band application in the field of satellite communication is well met. The invention makes the space size be well applied by bending and folding the antenna subunit, and the antenna has small size (0.135 lambda)0×0.135λ0×0.054λ0，λ0Representing free space wavelength of 353 MHz), low cost, convenient assembly and the like, and can be well applied to satellite communication antennas.
In conclusion, the antenna has the characteristics of compact structure, low cost, convenience in assembly, light weight, tunable frequency and the like, and can meet the application of satellite communication antennas of aircrafts and carrier airships in UHF frequency bands.
The above embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the technical scope of the claims.
Claims (6)
1. A miniaturized antenna based on coupled-radiation dual-inverted-F/L printed antenna elements, comprising:
the LED display panel comprises an upper-layer substrate (1) and four vertical substrates (2), wherein the four vertical substrates (2) are arranged below the upper-layer substrate (1) and are perpendicular to the upper-layer substrate (1), and the four vertical substrates (2) are mutually connected to form a square frame in a surrounding mode;
the antenna comprises four double-inverted-F/L antenna units (3), wherein each double-inverted-F/L antenna unit comprises a copper strip printed on the upper-layer substrate (1) and the vertical substrate (2), and the copper strips are distributed around the central axis of the square frame in a rotational symmetry manner and are used for transmitting ultrahigh-frequency signals;
each double-inverted-F/L antenna unit (3) comprises an inverted-L antenna subunit (10) and an inverted-F antenna subunit (11); the inverted-L antenna subunit (10) and the inverted-F antenna subunit (11) mainly comprise copper strips (12); the inverted-L antenna subunit (10) and the inverted-F antenna subunit (11) are respectively printed on the inner surface and the outer surface of the vertical substrate (2);
the tuning screws (4) are arranged on the upper-layer substrate (1), and each tuning screw (4) is electrically connected with the tail end of one double-inverted-F/L antenna unit (3) and used for realizing frequency tuning of the antenna;
the metal plate (5) is arranged below the vertical substrate (2) and is parallel to the upper substrate (1);
the lower-layer substrate (6) is arranged right below the metal plate (5), and the upper surface of the lower-layer substrate (6) is electrically connected with the lower surface of the metal plate (5) to form a metal grounding surface;
the feed network (7) is printed on the lower surface of the lower substrate (6) and is used for receiving ultrahigh frequency signals and generating four-way sequence feed signals with the same amplitude and phases which are sequentially different by 90 degrees;
the four feeding probes (8) are arranged at the joint of the metal plate (5) and the vertical substrate (2), are parallel to the vertical substrate (2), are distributed in a rotational symmetry manner around the central axis of the whole antenna structure, and are used for respectively feeding four paths of serial feeding signals to each double-inverted-F/L antenna unit (3); the inverted-F antenna subunit (11) is a main driving subunit, and the lower end of the inverted-F antenna subunit (11) is electrically connected with the feed probe (8) to form a single-band radiation PIFA antenna;
a mounting plate (9) arranged below the electrical network (7) for protecting the feeding network (7).
2. A miniaturized antenna based on a coupled-radiation dual-inverted-F/L printed antenna unit according to claim 1, characterized in that the L-antenna sub-unit (10) is folded by 90 degrees bending after being led to the outer surface of the vertical substrate (2) through a metallized via (13).
3. A miniaturised antenna based on a coupled radiating double inverted F/L printed antenna element according to claim 2, characterised in that the feeding network (7) comprises:
the input port (14) is arranged on the lower surface of the lower substrate (6) and connected with an SMA connector (16);
the four output ports (15) are arranged on the lower surface of the lower-layer substrate (6) and are rotationally and symmetrically distributed around the integral central axis of the antenna, and the output ports (15) are electrically connected with each feed probe (8);
the balun converter (17) with 180 degrees is arranged on the lower surface of the lower substrate (6), the balun converter (17) is connected with the input port (14), and the signal of the input port (14) is divided into two paths of signals with equal amplitude and 180-degree phase difference;
the two 3dB 90-degree hybrid bridges (18) are connected with the balun converter (17), and two sides of the balun converter (17) are arranged for dividing the two paths of signals with equal amplitude and 180-degree phase difference into four paths of output signals with equal amplitude and 90-degree phase difference in sequence, namely four paths of sequence feed signals; a 3dB 90-degree hybrid bridge (18) is connected with the two output ports (15);
the resistance value of the two isolation resistors (19) is 50 ohms, and the two isolation resistors (19) are connected with the two 3dB 90-degree hybrid bridges (18) in a one-to-one correspondence mode and used for terminating signals of the two 3dB 90-degree hybrid bridges;
and the transmission line (20) is used for electrically connecting the input port (14), the output port (15), the 180-degree balun converter (17) and the two 3dB 90-degree bridges (18) to realize the communication of the whole feed network (7).
4. A miniaturized antenna based on a coupled-radiation double-inverted-F/L printed antenna unit as claimed in claim 3, characterized in that the material of said metal plate (5) and said mounting plate (9) are both conductive metal media.
5. The miniaturized antenna based on coupled-radiation dual-inverted-F/L printed antenna unit of claim 4, wherein the conductive metal medium comprises aluminum.
6. The miniaturized antenna based on the coupled radiation double-inverted-F/L printed antenna unit according to any one of claims 1 to 5, characterized in that the upper substrate (1), the vertical substrate (2) and the lower substrate (6) are all PCB circuit boards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010872488.2A CN112103627B (en) | 2020-08-26 | 2020-08-26 | Miniaturized antenna based on coupling radiation double-inverted F/L printed antenna unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010872488.2A CN112103627B (en) | 2020-08-26 | 2020-08-26 | Miniaturized antenna based on coupling radiation double-inverted F/L printed antenna unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112103627A CN112103627A (en) | 2020-12-18 |
| CN112103627B true CN112103627B (en) | 2021-11-23 |
Family
ID=73756736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010872488.2A Active CN112103627B (en) | 2020-08-26 | 2020-08-26 | Miniaturized antenna based on coupling radiation double-inverted F/L printed antenna unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112103627B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113422200B (en) * | 2021-07-05 | 2023-11-10 | 江苏方天电力技术有限公司 | Back reflection multi-frequency-point hollowed-out built-in antenna and design method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035071A (en) * | 2010-10-27 | 2011-04-27 | 北京邮电大学 | RFID (Radio Frequency Identification) reader antenna with double-frequency circular polarization features |
| JP2017092588A (en) * | 2015-11-05 | 2017-05-25 | 日本無線株式会社 | Dual frequency circularly polarized wave plane antenna, and method for adjustment of axial ratio thereof |
| CN107123851A (en) * | 2017-04-01 | 2017-09-01 | 厦门致联科技有限公司 | A kind of fitting room RFID system reading and writing device antenna based on miniaturization technology |
| US10347991B2 (en) * | 2016-05-08 | 2019-07-09 | Tubis Technology, Inc. | Orthogonally polarized dual frequency co-axially stacked phased-array patch antenna apparatus and article of manufacture |
| CN110534878A (en) * | 2019-08-26 | 2019-12-03 | 华南理工大学 | A kind of miniaturization UHF antenna based on split ring resonator load |
| CN210516983U (en) * | 2019-10-14 | 2020-05-12 | 上海安费诺永亿通讯电子有限公司 | Antenna device for skynet transceiver |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571516B (en) * | 2019-10-16 | 2024-02-06 | 福州大学 | Z-shaped coupling feed small-sized directional circularly polarized RFID reader antenna |
-
2020
- 2020-08-26 CN CN202010872488.2A patent/CN112103627B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035071A (en) * | 2010-10-27 | 2011-04-27 | 北京邮电大学 | RFID (Radio Frequency Identification) reader antenna with double-frequency circular polarization features |
| JP2017092588A (en) * | 2015-11-05 | 2017-05-25 | 日本無線株式会社 | Dual frequency circularly polarized wave plane antenna, and method for adjustment of axial ratio thereof |
| US10347991B2 (en) * | 2016-05-08 | 2019-07-09 | Tubis Technology, Inc. | Orthogonally polarized dual frequency co-axially stacked phased-array patch antenna apparatus and article of manufacture |
| CN107123851A (en) * | 2017-04-01 | 2017-09-01 | 厦门致联科技有限公司 | A kind of fitting room RFID system reading and writing device antenna based on miniaturization technology |
| CN110534878A (en) * | 2019-08-26 | 2019-12-03 | 华南理工大学 | A kind of miniaturization UHF antenna based on split ring resonator load |
| CN210516983U (en) * | 2019-10-14 | 2020-05-12 | 上海安费诺永亿通讯电子有限公司 | Antenna device for skynet transceiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112103627A (en) | 2020-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5949383A (en) | Compact antenna structures including baluns | |
| US7245268B2 (en) | Quadrifilar helical antenna | |
| EP2647124B1 (en) | Balanced antenna system | |
| US5608413A (en) | Frequency-selective antenna with different signal polarizations | |
| US6583765B1 (en) | Slot antenna having independent antenna elements and associated circuitry | |
| US7619568B2 (en) | Patch antenna including septa for bandwidth control | |
| JP3753436B2 (en) | Multiband printed monopole antenna | |
| US5828342A (en) | Multiple band printed monopole antenna | |
| CN107895846B (en) | Circular polarization patch antenna with broadband | |
| US6061031A (en) | Method and apparatus for a dual frequency band antenna | |
| US11444381B2 (en) | Antenna array having antenna elements with integrated filters | |
| Ding et al. | Achieving wider bandwidth with full-wavelength dipoles for 5G base stations | |
| US20050237244A1 (en) | Compact RF antenna | |
| EP1032958B1 (en) | Compact antenna feed circuits | |
| US6590543B1 (en) | Double monopole meanderline loaded antenna | |
| CN110534878A (en) | A kind of miniaturization UHF antenna based on split ring resonator load | |
| JP2002100915A (en) | Dielectric antenna | |
| CN108511880B (en) | Miniaturized ultrahigh frequency ternary sequence feed antenna | |
| RU2480870C1 (en) | Multirange antenna of circular polarisation with metamaterial | |
| CN112103627B (en) | Miniaturized antenna based on coupling radiation double-inverted F/L printed antenna unit | |
| US10389015B1 (en) | Dual polarization antenna | |
| Geary et al. | Single-feed dual-band stacked patch antenna for orthogonal circularly polarized GPS and SDARS applications | |
| CN112234360A (en) | Dual-polarized transmission surface for controlling electrical characteristics by terminating filter circuit and design method thereof | |
| CN115084872B (en) | Ultra-wide bandwidth scanning angle tight coupling phased array antenna | |
| CN116565518A (en) | Antenna and antenna apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |