WO2005029633A1 - Filtros y antenas de microondas y milimetricas basados en resonadores de anillos abiertos y en lineas de transmision planares - Google Patents
Filtros y antenas de microondas y milimetricas basados en resonadores de anillos abiertos y en lineas de transmision planares Download PDFInfo
- Publication number
- WO2005029633A1 WO2005029633A1 PCT/ES2004/000414 ES2004000414W WO2005029633A1 WO 2005029633 A1 WO2005029633 A1 WO 2005029633A1 ES 2004000414 W ES2004000414 W ES 2004000414W WO 2005029633 A1 WO2005029633 A1 WO 2005029633A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter according
- open
- filter
- ring resonators
- conductive strip
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/2013—Coplanar line filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
- H01Q9/265—Open ring dipoles; Circular dipoles
Definitions
- the present invention relates to microwave and millimeter wave filters and antennas based on open ring resonators and planar transmission lines.
- Periodic structures based on open-ring resonators are known to synthesize band rejection frequency responses and to achieve targeting properties of electromagnetic waves propagating in space. Such structures are based on the fact that in the vicinity of the resonance frequency, such rings can behave as an effective medium with extreme values of permeability (positive below resonance and negative above it). For this, it is necessary that said periodic structures be irradiated with the polarized magnetic field parallel to the axis of the rings. Thus, the propagation of electromagnetic signals in a narrow frequency band around the resonance frequency is inhibited, and therefore, a band rejection behavior is obtained. Periodic structures based on open-ring resonators to synthesize band-pass responses are also known.
- Structures based on open ring resonators embedded in a rectangular waveguide have also been proposed, which also emulates microwave plasma up to the cutoff frequency of the wire.
- these structures behave like elements of electric or magnetic current that enable the emission and reception of electromagnetic waves as an antenna.
- the emission or reception of radiation can be experimentally observed thanks to the fact that the structure allows the propagation of fast waves.
- a limitation of the previous structures for their practical use as filters, antennas, etc., is the fact that they are not compatible with circuit manufacturing technologies (printed circuits or microelectronic technologies), since they are three-dimensional structures.
- the objective of the present invention is to solve the aforementioned drawbacks related to structures based on open rings, developing a filter based on a planar transmission medium that can act as a bandpass filter, band rejection filter or elementary antennas or groups thereof , operating at microwave frequencies and millimeter waves and compatible with planar circuit manufacturing technologies and modern micro-machining techniques.
- the microwave and millimeter wave filter of the present invention is characterized by the fact that it comprises a planar transmission medium that includes a conductive strip, metal ground plane and dielectric substrate and by the fact that it comprises at least one open-ring resonator. This characteristic allows to make filters of very reduced dimensions, because the dimensions of the open ring resonators are much smaller than the wavelength at the resonance frequency of the open rings.
- these filters have low insertion losses in the passband, their design is very simple and their manufacturing process is compatible with printed and integrated circuit manufacturing technologies. They also have high frequency selectivity as a consequence of the high quality factor of open-ring resonators.
- the open ring resonators are metallic and are arranged in magnetic coupling with the planar transmission medium.
- Said open ring resonators comprise at least one pair of concentric metallic rings (same level) or a pair of rings arranged one above the other, with openings at some point thereof in order to achieve a resonant structure.
- Spiral open ring resonators are also included.
- the conductive strip is electrically separated from the metal ground plane, behaving like a band rejection filter.
- the filter presents a frequency response type of band rejection.
- the open ring resonators of the latest presented topology are metallic and arranged in series with the conductive strip.
- the planar transmission medium is based on conventional transmission lines (coplanar, microstrip, tape) or variants thereof. Thanks to this feature, the filters can be supplemented in any type of transmission line compatible with printed or integrated circuit technologies.
- the tape transmission line is known as the stripline '.
- open-ring resonators are etched into the metal ground plane with their negative surface of that of metallic open ring resonators (complementary rings).
- the conductive strip has continuity, behaving like a band rejection filter.
- the filter presents a frequency response type of band rejection.
- the conductive strip presents continuity, behaving like a band-pass filter.
- the filter presents a type frequency response pass band.
- the filter comprises metallic open ring resonators in magnetic coupling with the planar transmission medium and complementary open ring resonators etched in the metal ground plane, obtaining a bandpass response.
- the open rings are of circular or polyhedral geometry, they have a plurality of metal elements and / or openings engraved on one or more metal levels. The combination of all these characteristics of the open rings allows to achieve a resonant structure in a wide frequency range.
- the filter has multiple pass or reject bands, with bandwidth controllable by the number of openings and / or the arrangement of open-ring resonators and / or their geometry.
- the filter is electronically reconfigurable and incorporates switches. microelectromechanical (MEMS).
- MEMS microelectromechanical
- a microwave or millimeter wave antenna can be implemented according to any of the previous embodiments.
- the fact that the radiation diagrams have good levels of directivity and polarization, allows the filter to behave like an antenna, since it eliminates the incident waves by radiating them.
- variants based on battery antenna arrays can be implemented.
- a suitable adjustment of the properties of the rings allows to emphasize the radiation properties of said structures allowing their use for the emission and reception of electromagnetic waves.
- FIG. 1 shows in perspective a planar transmission medium consisting of a buried coplanar waveguide (ie, with dielectric substrate above and below the conductive strip and ground planes).
- Figure 2 shows some topology of open-ring, spiral, and serial configuration resonators.
- Figure 3 shows the topology of a preferred embodiment for a band pass filter with three stages of ring resonators and performed using a buried coplanar waveguide (i.e.
- Figure 4 shows a graph of the measured frequency response of the filter of the invention corresponding to the preferred embodiment
- Figure 5 shows a typical radiation diagram of the claimed structures of this invention.
- Figure 1 of the present invention shows a structure of planar transmission medium 1 type buried coplanar waveguide, that is, with dielectric substrate 2 on both sides of the central metallic plane 10 in which the conductive strip 3 is defined, separated from the metallic ground planes 4 by the slots 9, also called slots.
- the coplanar waveguide may consist of the same structure as that shown in Figure 1, but only with dielectric substrate 2 on one side of the central metal plane 10, which contains the central conductor and the metal ground planes 4 Or any other type of configuration with multiple layers of dielectric substrate 2.
- Other propagation means are also possible, such as the microtips, tape transmission line, also called x stripline ', and in general any planar transmission medium.
- FIG. 2 shows some examples of open-ring resonators 5, which are characterized by presenting two metallic open rings 8, that is, with openings 7 at some point.
- Topology 5a comprises two concentric metallic open rings 8 each with an opening 7, said openings 7 being arranged at 180 °.
- Topology 5b comprises two concentric metallic open rings 8 each with two openings 7 arranged at 180 ° to each other, said openings 7 being arranged in the same position and a end of metallic open ring 8 with opposite end of the other.
- Topology 5c comprises two metal open rings 8 superimposed on different planes, each with an opening 7, said openings 7 being arranged at 180 °.
- Topology 5d comprises two concentric metallic open rings 8 each with two openings 7 arranged 180 ° with respect to each other, openings 7 of one ring being arranged at 90 ° with respect to those of the other.
- Topology 5e comprises two spiral concentric metal open rings 8, each with an opening 7, said openings 7 being arranged in the same position and one end of the open metal ring 8 being attached to the opposite end of the other.
- Topology 5f comprises two symmetrical concentric metallic open rings 8, each with an opening 7, said openings 7 being arranged in the same position and arranged in series with the conductive strip 3.
- Figure 3 shows the topology of a filter 11 with a buried coplanar waveguide structure and based on metallic open-ring resonators 5, with openings 7 on opposite sides, and engraved on the outer faces of the dielectric substrate 2.
- said topology which provides a band-pass frequency response, They also appreciate narrow metallic connections 6, between the conductive strip 3 and the metallic ground planes 4.
- the design of the filter 11, with a band-pass response is based on the fact that the metallic connections 6 between the conductive strip 3 and the metal ground planes 4 they give the structure a plasma-like behavior up to a frequency (plasma frequency) that is controlled by the width of the aforementioned metal junctions 6 and the separation between them, and which must be above the resonance frequency of the ring resonators open 5a, 5b, 5c, 5d and 5e.
- the metallic junctions 6 provide the propagation medium with an effective permittivity with a negative value.
- the design of the filter 11 is based on the dimensions of the open ring resonators 5a, 5b, 5c, 5d and 5e, including the separation between them and their width, which does not have to be identical in each open ring 8 of the open ring resonator 5a, 5b, 5c, 5d and 5e. Said dimensions determine the value of the resonance frequency of the open ring resonator 5a, 5b, 5c, 5d and 5e, by means of which the position of the pass band 13 of the filter 11, which begins at the resonance frequency of the filter 11, is controlled. open ring resonator 5a, 5b, 5c, 5d and 5e.
- the open ring resonators 5a, 5b, 5c, 5d and 5e being in magnetic coupling with the propagation medium, give the propagation medium a negative value of the effective permeability in a narrow frequency region, extending the band 13 of the filter 11 in that region • where negative values of. effective permittivity and permeability.
- the planar transmission medium 1 (buried coplanar waveguide) should be designed with values of the width of the grooves 9 and of the conductive strip 3 to provide a value of the impedance characteristic of said planar transmission medium 1 equal to 50 ⁇ .
- the filter 11 can also be made by other open ring resonator topologies 5 and with different types of geometries of such open ring resonators 5 (round, square, and polyhedral in general). It is also possible to carry out filter 11 by means of complementary open ring resonators 5 and capacitive gaps in the conductive strip 3.
- Figure 4 shows the graph corresponding to the frequency response 12 (insertion loss 12a and return loss 12b) of filter 11 described in the present invention, with three stages of open ring resonators 5, where the low loss values in the pass band 13 and the abrupt cut in the transition zones 14 are observed.
- Band rejection filters can also be made with an identical design to that described but without metallic connections 6 between the conductive strip 3 and the metallic ground planes 4. With a suitable design of the dimensions of the structure, its radiation characteristics are enhanced, allowing its use as an elemental antenna or in a group of them as shown in figure 5, in which a typical radiation diagram for a frequency is observed. 6.5 GHz ia.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04766952A EP1675212A1 (en) | 2003-09-25 | 2004-09-22 | Filters and antennas for microwaves and millimetre waves, based on open-loop resonators and planar transmission lines |
US10/573,426 US20070024399A1 (en) | 2003-09-25 | 2004-09-22 | Filters and antennas for microwaves and millimetre waves, based on open-loop resonators and planar transmission lines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ESP-200302282 | 2003-09-25 | ||
ES200302282A ES2235623B1 (es) | 2003-09-25 | 2003-09-25 | Filtros y antenas de microondas y milimetricas basados en resonadores de anillos abiertos y en lineas de transmision planares. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005029633A1 true WO2005029633A1 (es) | 2005-03-31 |
Family
ID=34354859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2004/000414 WO2005029633A1 (es) | 2003-09-25 | 2004-09-22 | Filtros y antenas de microondas y milimetricas basados en resonadores de anillos abiertos y en lineas de transmision planares |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070024399A1 (es) |
EP (1) | EP1675212A1 (es) |
ES (1) | ES2235623B1 (es) |
WO (1) | WO2005029633A1 (es) |
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CN101771182B (zh) * | 2010-02-09 | 2012-12-26 | 天津职业技术师范大学 | 小型化窄带带通滤波器 |
CN103022720A (zh) * | 2011-09-28 | 2013-04-03 | 深圳光启高等理工研究院 | 一种负磁导率超材料 |
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2004
- 2004-09-22 WO PCT/ES2004/000414 patent/WO2005029633A1/es not_active Application Discontinuation
- 2004-09-22 US US10/573,426 patent/US20070024399A1/en not_active Abandoned
- 2004-09-22 EP EP04766952A patent/EP1675212A1/en not_active Withdrawn
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CN101771182B (zh) * | 2010-02-09 | 2012-12-26 | 天津职业技术师范大学 | 小型化窄带带通滤波器 |
CN103069439A (zh) * | 2010-06-15 | 2013-04-24 | 原子能与替代能源委员会 | 用于潮湿环境的天线 |
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US9362622B2 (en) | 2010-06-15 | 2016-06-07 | Commissariat à l'énergie atomique aux énergies alternatives | High-frequency antenna |
US9379442B2 (en) | 2010-06-15 | 2016-06-28 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Antenna for a moist environment |
CN103022720A (zh) * | 2011-09-28 | 2013-04-03 | 深圳光启高等理工研究院 | 一种负磁导率超材料 |
WO2013075657A1 (zh) * | 2011-11-25 | 2013-05-30 | Liu Zhijia | 微带贴片式rfid标签天线 |
CN102709705A (zh) * | 2012-04-27 | 2012-10-03 | 深圳光启创新技术有限公司 | 一种mri磁信号增强器件 |
CN102709705B (zh) * | 2012-04-27 | 2015-05-27 | 深圳光启创新技术有限公司 | 一种mri磁信号增强器件 |
CN106602280A (zh) * | 2016-08-09 | 2017-04-26 | 广东通宇通讯股份有限公司 | 滤波馈电网络及基站天线 |
Also Published As
Publication number | Publication date |
---|---|
US20070024399A1 (en) | 2007-02-01 |
ES2235623B1 (es) | 2006-11-01 |
ES2235623A1 (es) | 2005-07-01 |
EP1675212A1 (en) | 2006-06-28 |
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