CN101227028B - Double frequency slit antenna of substrate integrated waveguide - Google Patents

Double frequency slit antenna of substrate integrated waveguide Download PDF

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Publication number
CN101227028B
CN101227028B CN2008100191639A CN200810019163A CN101227028B CN 101227028 B CN101227028 B CN 101227028B CN 2008100191639 A CN2008100191639 A CN 2008100191639A CN 200810019163 A CN200810019163 A CN 200810019163A CN 101227028 B CN101227028 B CN 101227028B
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waveguide
plated
antenna
hole
metal patch
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CN101227028A (en
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洪伟
曾志雄
蒯振起
陈继新
汤红军
余晨
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Southeast University
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Southeast University
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Abstract

A dual frequency slot array antenna of base-plate integrated waveguide is fit for working in two frequencies which have biggish separation and radio communication system which limits the size of the antenna volume, wherein the antenna is made on a medium base-plate, the base-plate integrated waveguide comprises a circled part which is a first waveguide (I) via a first plated-through hole (41), a circled part which is a second waveguide (II) via a second plated-through hole (42) and a circled part which is a third waveguide (III) via a third plated-through hole (43), and the three parts are orderly connected with each other, the end of the first waveguide (I) is a fourth plated-through hole (5), the two sides of the central line of the upper metal surface in the first waveguide (I) are respectively provided with a first slot array (6) which works in high-frequency section, a second slot array (7) which works in low-frequency section is arranged on the central line of the upper metal surface in the third waveguide (III), the two sides of the second slot array (7) are alternatively provided with a plated-through hole (8), and one end of the third waveguide (III) is connected with a straight microstrip line (9) via a section of a gradation microstrip line (3).

Description

The double frequency slit antenna of substrate integration wave-guide
Affiliated field
It is antenna integrated to the present invention relates to a kind of substrate that is operated in two-band; This antenna adopts substrate integration wave-guide (Substrate Integrated Waveguide SIW) technology, is particularly suitable for being operated in bigger at interval two frequency ranges and to the wireless communication system of antenna volume limited size system.
Background technology
Characteristics such as traditional metal rectangular waveguide slot array antenna has that main lobe width is narrow, directional diagram can figuration, cross polarization level is low have a wide range of applications in radar and wireless communication system.Yet rectangular waveguide slot array antenna volume is huger, and processing cost is high, is not suitable for modern planar circuit integrated.Integrated and the light-weighted requirement of equipment for adaptive system, people have proposed the antenna technology of multiple suitable planographic technology, comprising the antenna of various microstrip antennas and printing form.Though these technology have solved the requirement integrated with circuit preferably, also exist problems such as, cross polarization level height little such as power capacity.The chip integrated waveguide slot antenna has the advantage of the antenna of traditional metal SLOTTED ANTENNA IN A RECTANGULAR WAVEGUIDE and plane typography simultaneously; Can be integrated in the same dielectric substrate with modern planar circuit; Can utilize ripe PCB technology processing; Design cost and low production cost are fit to large-scale production very much.
Along with the development of personal radio communication technology and wireless local area network technology, a lot of wireless communication systems need be in two bigger frequency ranges of interval transmission signals.If adopt two slave antennas in order to realize two-band work; Then in order to reduce the spacing of blocking and disturb its installation of needs increasing between them; This can strengthen system's occupation space undoubtedly, and Modern wireless communication specification requirement system occupation space is more little good more.Here proposed a kind of dual-band antenna based on the chip integrated waveguide slot antenna technology, this antenna radiation characteristic in two working frequency range is separate basically for this reason.
Summary of the invention
Technical problem: the double frequency slot array antenna that the objective of the invention is to propose a kind of substrate integration wave-guide; Have at two working frequency range directional diagrams separate; Be easy to group battle array and realize a high-gain, advantage such as cross polarization is low, loss is little, volume is little, cost is low, be convenient to produce in batches, be easy to planar circuit is integrated.
Technical scheme: the dual-band antenna of substrate integration wave-guide of the present invention has at two working frequency range directional diagrams separate; Be easy to the group battle array and realize high-gain; Advantages such as cross polarization is low, loss is little, volume is little, cost is low, be convenient to produce in batches, be easy to planar circuit is integrated are suitable for being operated in the personal wireless communications system and the wireless network access scheme of double frequency very much.
The double frequency slot array antenna of substrate integration wave-guide of the present invention is produced on the dielectric substrate; Upper surface at dielectric substrate is covered with the first upper surface metal patch, the second upper surface metal patch; Lower surface is covered with the first lower surface metal patch, the second lower surface metal patch and surrounds substrate integration wave-guide through the plated-through hole array of double layer of metal face up and down; Substrate integration wave-guide by first plated-through hole enclose part by first waveguide, by second plated-through hole enclosed part by second waveguide, to be enclosed by the 3rd plated-through hole partly be that three parts of the 3rd waveguide are linked in sequence and constitute, the end of first waveguide is the 4th plated-through hole; The both sides of metal surface center line are respectively equipped with first gap array that is operated in high band in first waveguide; Last metal surface center line in the 3rd waveguide is provided with second gap array that is operated in low-frequency range, and what replace in the both sides of second gap array is provided with a plated-through hole; One end of the 3rd waveguide links to each other with straight microstrip line through one section gradual change microstrip line.
The lower surface of first waveguide and the pairing dielectric substrate of the 3rd waveguide be provided with first gap array of upper surface, the 3rd gap array that second gap array is corresponding fully, Fpir Crevices crack array with the realization omnidirectional antenna.
Beneficial effect: the present invention has following advantage:
1. this antenna can be operated in two frequency ranges, and two frequency ranges can be very big at interval, and their directional diagram is separate simultaneously.
2. this antenna is easy to planar circuit integrated.Because this aerial array utilizes metal throuth hole to realize fully on dielectric substrate, all can utilize the PCB explained hereafter, cost is low, precision is high, good reproducibility, is fit to produce in enormous quantities.
3. this antenna has lower loss, can realize higher gain.
Description of drawings
Fig. 1 is the Facad structure sketch map of the double frequency slot array antenna of substrate integration wave-guide of the present invention.
Fig. 2 is the structure sketch map of the double frequency slot array antenna of substrate integration wave-guide of the present invention.Wherein Fig. 2 a is to crack and form the structural representation of omnidirectional antenna in the back side; Fig. 2 b is not crack and form the structural representation of unidirectional antenna in the back side.
Fig. 3 is the structural representation of embodiment of the invention antenna.Wherein Fig. 3 a is the Facad structure sketch map, and Fig. 3 b is the structure sketch map.
Fig. 4 is an antenna of the present invention reflection coefficient test result in kind,
Fig. 5 is antenna of the present invention E face and H face directional diagram test result when being operated in 2.46GHz,
Fig. 6 is antenna of the present invention E face and H face directional diagram test result when being operated in 3.5GHz.
Have among the above figure: the first upper surface metal patch 2, the second upper surface metal patch, 3, the first lower surface metal patches 21, the second lower surface metal patch 31, first plated-through hole 41, the first waveguide I, by second plated-through hole 42, the second waveguide II, the 3rd plated-through hole 43, the 3rd waveguide III, the 4th plated-through hole 5, first gap array 6, second gap array 7, plated-through hole 8, straight microstrip line 9.
Embodiment
Dual-band antenna of the present invention is an a kind of chip integrated waveguide dual-frequency omnidirectional slot antenna; This antenna is produced on the dielectric substrate; Be covered with the first upper surface metal patch 2, the second upper surface metal patch 3 at the upper surface of dielectric substrate; Lower surface is covered with the first lower surface metal patch 21, the second lower surface metal patch 31 and surrounds substrate integration wave-guide through the plated-through hole array of double layer of metal face up and down; Substrate integration wave-guide by 41 of first plated-through holes enclose part by the first waveguide I, by second plated-through hole 42 enclosed part by the second waveguide II, to be enclosed part by the 3rd plated-through hole 43 be that three parts of the 3rd waveguide III are linked in sequence and constitute, the end of the first waveguide I is the 4th plated-through hole 5; The both sides of metal surface center line are respectively equipped with first gap array 6 that is operated in high band in the first waveguide I; Last metal surface center line among the 3rd waveguide III is provided with second gap array 7 that is operated in low-frequency range, and what replace in the both sides of second gap array 7 is provided with plated-through hole 8; The end of the 3rd waveguide III links to each other with straight microstrip line 9 through one section gradual change microstrip line 3.Be provided with three gap array 61 corresponding fully with first gap array of upper surface, second gap array, Fpir Crevices crack array 71 to realize omnidirectional antenna (shown in Fig. 2 (a)) with the lower surface of the first waveguide I and the pairing dielectric substrate of the 3rd waveguide III, also can not establish slit (shown in Fig. 2 (b)) then is the one-way radiation antenna.
The structure of introducing above the utilization of this instance has realized being operated in the omnidirectional antenna of two frequency ranges of 2.4GHz/3.5GHz, and this antenna can be applied to the system of integrated with personal radio communication and broadband radio access network.Antenna structure is as shown in Figure 3, and the dielectric substrate relative dielectric constant that antenna adopts is 2.2, and dielectric substrate thickness is 2mm, and the metal throuth hole diameter that constitutes substrate integration wave-guide is 0.3mm, and spacing is 0.8mm between the through hole.The test result of antenna is like Fig. 4,5, shown in 6, this antenna at 2.437GHz to 2.474GHz and 3.456GHz to two frequency range internal reflections of 3.556GHz coefficient all less than-10dB, present tangible dual frequency characteristics.Measure gain when this antenna works in 2.46GHz and be 3.87dB, the ripple of directional diagram E face is less than 0.6dB; Measure gain when working in 3.5GHz and be 2.61dB, the ripple of directional diagram E face is less than 1.5dB.

Claims (2)

1. the double frequency slot array antenna of a substrate integration wave-guide; It is characterized in that this antenna is produced on the dielectric substrate; The second upper surface metal patch (3) that is covered with the first upper surface metal patch (2) and is positioned at the first upper surface metal patch (2) one ends at the upper surface of dielectric substrate; This second upper surface metal patch (3) is one section gradual change microstrip line; The second lower surface metal patch (31) that lower surface is covered with the first lower surface metal patch (21) and is positioned at the first lower surface metal patch (21) one ends; The second lower surface metal patch (31) is relative across dielectric substrate with the second upper surface metal patch (3); Plated-through hole array through the first upper surface metal patch (2) and the first lower surface metal patch (21) surrounds substrate integration wave-guide; Substrate integration wave-guide by first plated-through hole (41) enclose part by first waveguide (I), by second plated-through hole (42) enclosed part by second waveguide (II), to be enclosed by the 3rd plated-through hole (43) partly be three parts of the 3rd waveguide (III) formations that are linked in sequence, the other end of first waveguide (I) is the 4th plated-through hole (5); The both sides of the last metal surface center line in first waveguide (I) are respectively equipped with first gap array (6) that is operated in high band; Last metal surface center line in the 3rd waveguide (III) is provided with second gap array (7) that is operated in low-frequency range, and what replace in the both sides of second gap array (7) is provided with a plated-through hole (8); The other end of the 3rd waveguide (III) links to each other with straight microstrip line (9) through above-mentioned gradual change microstrip line.
2. the double frequency slot array antenna of substrate integration wave-guide according to claim 1, the lower surface that it is characterized in that first waveguide (I) and the pairing dielectric substrate of the 3rd waveguide (III) (1) be provided with first gap array (6) of upper surface, the 3rd gap array (61) that second gap array (7) is corresponding fully, Fpir Crevices crack array (71) with the realization omnidirectional antenna.
CN2008100191639A 2008-01-15 2008-01-15 Double frequency slit antenna of substrate integrated waveguide Active CN101227028B (en)

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CN101227028A CN101227028A (en) 2008-07-23
CN101227028B true CN101227028B (en) 2012-04-11

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103474780B (en) * 2013-09-13 2016-03-02 电子科技大学 Substrate integrated wave-guide cavity wave slot antenna
CN109326863B (en) * 2018-09-26 2020-12-01 宁波大学 Dual-frequency filtering power divider based on dielectric substrate integrated waveguide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1700514A (en) * 2005-05-30 2005-11-23 东南大学 Chip integrated waveguide dual-frequency broad-band slot array antenna unit
CN1815800A (en) * 2006-01-26 2006-08-09 东南大学 Micro-wave milimeter substrate integrated wave-guide filter antenna
CN1838478A (en) * 2006-01-26 2006-09-27 东南大学 Microwave millimeter-wave substrate integrated waveguide medium resonator antenna
CN201178135Y (en) * 2008-01-15 2009-01-07 东南大学 Bi-frequency slit antenna of substrate integrated waveguide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1700514A (en) * 2005-05-30 2005-11-23 东南大学 Chip integrated waveguide dual-frequency broad-band slot array antenna unit
CN1815800A (en) * 2006-01-26 2006-08-09 东南大学 Micro-wave milimeter substrate integrated wave-guide filter antenna
CN1838478A (en) * 2006-01-26 2006-09-27 东南大学 Microwave millimeter-wave substrate integrated waveguide medium resonator antenna
CN201178135Y (en) * 2008-01-15 2009-01-07 东南大学 Bi-frequency slit antenna of substrate integrated waveguide

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