CN201153148Y - Microwave phase shift device based on plane type micro-strip transmission line - Google Patents
Microwave phase shift device based on plane type micro-strip transmission line Download PDFInfo
- Publication number
- CN201153148Y CN201153148Y CNU2007200416671U CN200720041667U CN201153148Y CN 201153148 Y CN201153148 Y CN 201153148Y CN U2007200416671 U CNU2007200416671 U CN U2007200416671U CN 200720041667 U CN200720041667 U CN 200720041667U CN 201153148 Y CN201153148 Y CN 201153148Y
- Authority
- CN
- China
- Prior art keywords
- interdigital
- phase shifter
- transmission line
- pair
- sideband
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The utility model relates to a microwave phase shifter based on a plane-type left-hand microstrip transmission line structure, which solves the problems existing in the existing microwave phase shifter that the volume is large, the spoilage is large, the power capacity is less, etc. The microwave phase shifter of the utility model is formed by loading a PIN switch on a left-hand microstrip transmission line unit. The concrete proposal is as follows: a pair of PIN switches is installed on a pair of sidebands or a pair of line interdigitals at a symmetrical position; a signal input port and a signal output port are respectively positioned on the symmetrical position of the sidebands, thus the current passing through the PIN switch on a single line interdigital or a sideband is caused to be only a small part of the current of the whole phase shifter, thereby the power capacity of the phase shifter is greatly provided; except for the character of high power capacity, the phase shifter has various other advantages, such as less loss, small volume, fast shift speed, convenient manufacture, easy integration with an MMIC circuit, etc.; the microwave phase shifter has great superiority when being used in the radar and the phased antenna array.
Description
Technical field
The utility model relates to a kind of microwave phase shifter, exactly is based on the microwave phase shifter of plane type left hand microstrip transmission line.
Background technology
Microwave phase shifter has application in multiple field, as the radar system, and satellite communication system and phased array antenna array etc.The kind of phase shifter has a lot, and dividing according to materials used generally has five big classes: ferrite phase shifter, ferroelectric media phase shifter, semiconductor diode phase shifter, GaAs MMIC phase shifter and MEMS phase shifter.
Artech house had published " Microwave and Millimeter Wave Phase Shifters " in 1991, and first volume Dielectric and Ferrite Phase Shifters describes main kind, design, making and the application of ferrite phase shifter in detail in the book.Ferrite phase shifter mainly utilizes externally-applied magnetic field to change ferritic magnetic permeability in the waveguide, obtains different phase-shift phases thereby change electromagnetic phase velocity.Its advantage is: broadband, power capacity are big; Shortcoming is: volume is big, and loss is big, and switch speed is slow.
People such as Kozyre in 2000 have delivered the paper (" Application of Ferroelectrics in Phase Shifters Design " of " using ferroelectric media material design phase shifter " in the international conference of IEEE microwave theory and technique, A.Kozyrev, V.Osadchy, A.Pavlov, L.Sengupta, 2000 IEEE MTT-S Digest.P1355-1358).The ferroelectric media phase shifter mainly utilizes and changes the size that is added in the Dc bias on the ferroelectric media, changes the dielectric constant of medium, thereby the phase velocity of microwave signal is changed, and realizes phase shift.Its advantage is: simple in structure, volume is little, in light weight, loss is little, response speed is fast; Shortcoming is: power capacity is little.
Tsing-Hua University's microstrip circuit in 1976 is write group and has been write that " microstrip circuit " book, chapter 8 in the book--little band solid control circuit has at length been introduced the basic principle and the method for designing of the phase shifter of several based semiconductor PIN diode such as switching line formula phase shifter, loaded line formula phase shifter, reflection phase shifter.No matter adopt the sort of structure, all be to utilize PIN diode based on the principle of the phase shifter of PIN diode at positively biased and anti-two kinds of different on off states when inclined to one side, one section transmission line is switched on or switched off realizes phase shift.Its advantage is: volume is little, is easy to adopt Digital Signals, and response speed is fast; Shortcoming is: power consumption is big, power capacity is smaller.
May calendar year 2001, people such as Ellinger delivered paper (" Compact Reflective-TypePhase-Shifter MMIC for C-Band Using a Lumped-Element Coupler " Frank Ellinger of " adopting the reflective MMIC phase shifter of C-band compact of lamped element coupler " on IEEE Transaction on MTT, Rolf Vogt, Werner Bechtold, IEEE Transaction on Microwave Theory and Techniques, VOL.49, NO.5, MAY 2001).Phase shifter based on GaAs MMIC technology mainly adopts reflective structure, and its principle is by selecting different reflection termination to obtain the reflection coefficient of out of phase, thereby realizes phase shift.Its advantage is: volume is little, response speed is fast; Shortcoming is: the insertion loss is big, power capacity is little.
In June, 2002, people such as Rebeiz delivered paper (" RF MEMS phase shifters:design and applications " the Rebeiz G.M of " RF MEMS phase shifter: design and use " on IEEE Microwave, Guan-LengTan, Hayden J.S, Microwave Magazine, IEEE Volume 3, Issue 2, June 2002 Page (s): 72-81).The MEMS phase shifter utilizes the MEMS radio-frequency (RF) switch to change the size that is connected in parallel on the load capacitance between center of transmission line conduction band and the ground, thereby changes the equivalent line electric capacity of total, and then changes the phase velocity that microwave signal is passed through, and realizes phase shift.Its advantage is: loss is little, and power capacity is big; Shortcoming is: switch speed is slow, reliability is low, useful life is short.
Above-mentioned document shows, though ferrite phase shifter, MEMS phase shifter power capacity are bigger, switch speed is slow; Though ferroelectric material phase shifter, semiconductor diode phase shifter, GaAs MMIC phase shifter volume is little, switch speed is very fast, general power capacity is less.
About the left hand transmission line theory:
2006, John Wei Li father and son (John wiley﹠amp of publishing house; Son Press) published by Christopher's Caro of her rattan (TATSUO Itoh) of the big bamboo of branch school, California, USA university Los Angeles (University of California at Los Angeles) and Montreal, CAN engineering college (Ecole Polytechnique de Montreal) now (CHRISTOPHE Caloz) write about " the super material anisotropic media of electromagnetism " book (ElectromagneticMetamaterials).As the antithesis of right hand transmission line, left hand transmission line theory and application have been had the theory introduction of system for the first time.
The utility model content
The purpose of this utility model is: overcome that existing microwave phase shifter exists such as: volume is big, loss is big, the shortcoming of the little grade of power capacity, provide a kind of compact conformation based on the miniaturization of plane type left hand microstrip transmission line structure construction, the microwave phase shifter of high power capacity.
Concrete structural design scheme is as follows:
Left hand microstrip transmission line phase shifter of the present utility model is by loading PIN switch formation on the microstrip transmission line unit leftward.
The left hand microstrip transmission line unit designs on pcb board, and the ground floor of pcb board, the 3rd layer are conductive copper, and thickness is (0.004mm); The intermediate layer is the dielectric-slab of dielectric constant (1.07-13.6), and thickness is 0.254mm; On ground floor, make planar metal microstrip interdigital structure and constitute interdigital capacitor; The interdigital gap of interdigital capacitor is 0.1～0.3mm, and interdigital width is 0.1～0.8mm; At the two ends of interdigital capacitor a pair of and interdigital vertical sideband is arranged, the sideband width is 0.1-0.5mm; Constitute the ground of left hand microstrip transmission line by the 3rd layer metal; Select on the ground floor at least one sideband or any one interdigital, adopt the via hole technology by the short circuit nail formation inductance that will this three-layer metal ground interdigital or sideband and pcb board links to each other, the diameter of via hole is (0.1-0.8);
Select a pair of interdigital on the symmetric position of being positioned at, it is blocked, and install one in the truncated position and align dopings/intrinsic/bear doping diode (PIN) switch at interdigital symmetric position place, center; The signal input and output port lays respectively on the symmetric position of a pair of sideband.By controlling above-mentioned just the doping/intrinsic/negative doping diode (PIN) switch, realize control to the left-hand unit electromagnetic wave phase place of flowing through, utilize said structure, the utility model has been realized the microwave phase shifter based on left hand microstrip transmission line.
Also can select a pair of outermost that is positioned on the symmetric position interdigital, it be blocked, and align doping/intrinsic/negative doping diode (PIN) switch in truncated position installation one at this a pair of interdigital symmetric position place, center;
Still can select the symmetric position place, center of a pair of sideband that it is blocked, and align doping/intrinsic/negative doping diode (PIN) switch in truncated position installation one.
In the utility model, just doping/the intrinsic of phase shifter/negative doping diode (PIN) switch is installed on the interdigital or sideband of left hand transmission line, make like this by just mix on the single interdigital or sideband/electric current of intrinsic/negative doping diode (PIN) switch only is the very little part by whole phase shifter electric current, the power capacity of phase shifter has obtained large increase thus; Except that the characteristic of high power capacity, this phase shifter also has some other excellent electromagnetic property, and is little as volume, loss is low etc.Particularly, adopt the interdigital method that switch is installed that goes up of microstrip transmission line leftward to design phase shifter, can design the phase shifter that switch speed is fast, power capacity is big; Simultaneously, utilize left hand transmission line design phase shifter without any need for active device, do not need power conversion, can directly be produced on the common pcb board, can directly be produced on together with microwave circuit; Easy and MMIC circuit is integrated etc.; Using tool in radar, phased antenna array has great advantage.
Description of drawings
Fig. 1 is the schematic three dimensional views of embodiment 1 left hand microstrip transmission line phase shifter of the present utility model.
Fig. 2 is the schematic top plan view of Fig. 1.
Fig. 3 looks schematic diagram for the left side of Fig. 1.
Fig. 4 is the phase shift number of degrees schematic diagram of embodiment 1 left hand microstrip transmission line phase shifter of the present utility model.
Voltage standing wave ratio schematic diagram when Fig. 5 is embodiment 1 a left hand microstrip transmission line phase shifter switch closure of the present utility model.
Voltage standing wave ratio schematic diagram when Fig. 6 is embodiment 1 a left hand microstrip transmission line phase shifter switch opens of the present utility model.
Fig. 7 is the schematic three dimensional views of embodiment 2 left hand microstrip transmission line phase shifters of the present utility model.
Fig. 8 is the schematic top plan view of Fig. 7.
Fig. 9 looks schematic diagram for the left side of Fig. 7.
Figure 10 is the phase shift number of degrees schematic diagram of embodiment 2 left hand microstrip transmission line phase shifters of the present utility model.
Voltage standing wave ratio schematic diagram when Figure 11 is embodiment 2 left hand microstrip transmission line phase shifter switch closures of the present utility model.
Voltage standing wave ratio schematic diagram when Figure 12 is embodiment 2 left hand microstrip transmission line phase shifter switch opens of the present utility model.
Figure 13 is the schematic three dimensional views of embodiment 3 left hand microstrip transmission line phase shifters of the present utility model.
Figure 14 is the schematic top plan view of Figure 13.
Figure 15 looks schematic diagram for the left side of Figure 13.
Figure 16 is the phase shift number of degrees schematic diagram of embodiment 3 left hand microstrip transmission line phase shifters of the present utility model.
Voltage standing wave ratio schematic diagram when Figure 17 is embodiment 3 left hand microstrip transmission line phase shifter switch closures of the present utility model.
Voltage standing wave ratio schematic diagram when Figure 18 is embodiment 3 left hand microstrip transmission line phase shifter switch opens of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described by embodiment.
Embodiment 1:
Referring to Fig. 1, Fig. 2 and Fig. 3, the left hand microstrip transmission line phase shifter designs on pcb board, and the employing aspect is amassed and is the Rogers RT/TMM 10i alumina medium substrate of 8mm * 6mm; The ground floor of PCB, the 3rd layer are conductive copper, and thickness is (0.004mm), constitute the ground 1 of left hand transmission line by the 3rd layer metal, and the intermediate layer is the dielectric layer 2 of dielectric constant 9.8, and thickness is 0.254mm; In ground floor conductive copper 8mm * 6mm area centre 2.28mm * 1.9mm area, make interdigital capacitor 3, interdigital logarithm 5, be every and interdigitally have 5,2 parallel placements of interdigital intersection, interdigital width 0.1mm, interdigital spacing 0.1mm, interdigital length 1.14mm, on the two ends outermost is interdigital each 1, totally 2 interdigital APD0810-000PIN switches 4 (25 ℃ of following power capacities of normal temperature are 2.5W) that a pair of SKYWPRKS companies go up to be installed, the interdigital root 0.41mm of distance place, the position of the switch, switch size is 0.35mm * 0.35mm * 0.127mm, every interdigital end is connected with sideband 5, the wide 0.3mm of sideband, the long 1.9mm of sideband, input, output port 6 feeder lines lay respectively at the central authorities of 22 interdigital sidebands, feeder line width 0.25mm.On the sideband of the interdigital structure in upper strata, link to each other with the orlop ground wire by 2 short circuit nails 7 (solid cylindrical metallic copper, radius 0.15mm, height 0.254mm).2 short circuit nails all vertically pass in dielectric layer, and the short circuit nail is projected as circle at the upper strata metal covering, and home position is gone up lower edge 0.2mm most apart from sideband, and is circular tangent in the sideband edge.
Should the concrete electric property of implementing to realize be: centre frequency 9.5GHz, bandwidth of operation 2GHz, Fig. 4, Fig. 5 and Fig. 6 were seen in 11.25 ° of phase shifts (± 0.75 °) when the pair of switches state changed simultaneously.
Since this structure have 5 pairs totally 10 interdigital, therefore only be by about 1/10 of whole phase shifter electric current by the single interdigital electric current of going up the PIN switch, test through power capacity, the power capacity of finding this left hand microstrip transmission line phase shifter can reach 28.2W, is 11.28 times of single PIN switch power capacity.
Embodiment 2:
Referring to Fig. 7, Fig. 8 and Fig. 9, the left hand microstrip transmission line phase shifter designs on pcb board, and the employing aspect is amassed and is Rogers RT/duroid 5880 medium substrates of 8mm * 6mm; First and third layer of pcb board is conductive copper, and thickness is (0.004mm), constitutes the ground 1 of left hand transmission line by the 3rd layer metal, and the intermediate layer is the dielectric layer 2 of dielectric constant 2.2, and thickness is 0.254mm; In ground floor conductive copper centre 3.915mm * 2.3mm area, make interdigital capacitor 3, interdigital logarithm 4, promptly every interdigitally has 4,2 parallel placements of interdigital intersection, inboard 4 interdigital width 0.1mm, interdigital length 3.415mm, interdigital spacing 0.1mm; The 2 interdigital width 0.1mm in the inferior outside, interdigital length 3.415mm, the spacing interdigital with the inboard is 0.2mm; The 5082-0012 PIN switch 4 (25 ℃ of following power capacities of normal temperature are 1.5W) of a pair of AVAGO company is installed on interdigital in 2 in the inferior outside, the interdigital root 2.8mm of distance place, the position of the switch, switch size is 0.38mm * 0.38mm * 0.23mm, 2 interdigital width 0.3mm of outermost, interdigital length 0.5mm, the spacing interdigital with inferior inboard is 0.2mm; Every interdigital end is connected with sideband 5, the wide 0.1mm of sideband, and the long 2.1mm of sideband, input, output port 6 feeder lines lay respectively at the central authorities of 22 interdigital sidebands, feeder line width 0.776mm.The interdigital end of interdigital structure outermost on the upper strata, (solid cylindrical metallic copper, radius 0.15mm, height 0.254mm) links to each other with the orlop ground wire by 2 short circuit nails 7.2 short circuit nails all vertically pass in dielectric layer, and the short circuit nail is projected as circle at the upper strata metal covering, and is circular tangent with two interdigital ends that do not link to each other with sideband of outermost, and is positioned at interdigital.
Should the concrete electric property of implementing to realize be: centre frequency 9.5GHz, bandwidth of operation 2GHz, Figure 10, Figure 11 and Figure 12 were seen in 22.5 ° of phase shifts (± 1.5 °) when the pair of switches state changed simultaneously.
Since this structure have 4 pairs totally 8 interdigital, therefore only be by about 1/8 of whole phase shifter electric current by the single interdigital electric current of going up the PIN switch, test through power capacity, the power capacity of finding this left hand microstrip transmission line phase shifter can reach 12.8W, is 8.53 times of single PIN switch power capacity.
Embodiment 3:
Referring to Figure 13, Figure 14 and Figure 15, the left hand microstrip transmission line phase shifter designs on pcb board, and the employing aspect is amassed and is Rogers RT/duroid 5880 medium substrates of 8mm * 6mm; First and third layer of pcb board is conductive copper, and thickness is (0.004mm), constitutes the ground 1 of left hand transmission line by the 3rd layer metal, and the intermediate layer is the dielectric layer 2 of dielectric constant 2.2, and thickness is 0.254mm; In ground floor conductive copper centre 3.915mm * 6.7mm area, make interdigital capacitor 3, interdigital logarithm 4, promptly every interdigitally has 4,2 parallel placements of interdigital intersection, inboard 4 interdigital width 0.1mm, interdigital length 3.415mm, interdigital spacing 0.1mm; The 2 interdigital width 0.1mm in the inferior outside, interdigital length 3.415mm, the spacing interdigital with the inboard is 0.2mm; The APD0810-000 PIN switch 4 (25 ℃ of following power capacities of normal temperature are 2.5W) of a pair of SKYWPRKS company is installed on interdigital in 2 in the inferior outside, the interdigital root 2.8mm of distance place, the position of the switch, switch size is 0.35mm * 0.35mm * 0.127mm, 2 interdigital width 0.3mm of outermost, interdigital length 0.5mm, the spacing interdigital with inferior inboard is 0.2mm; Every interdigital end is connected with sideband 5, the wide 0.1mm of sideband, and the long 4.5mm of sideband also installs the APD0810-000 PIN switch 4 of a pair of SKYWPRKS company at distance sideband and an interdigital crossing end 3.5mm place; Input, output port 6 feeder lines lay respectively at a distance sideband and an interdigital crossing end 0.762mm place, feeder line width 0.776mm.The interdigital end of interdigital structure outermost on the upper strata, (solid cylindrical metallic copper, radius 0.15mm, height 0.254mm) links to each other with the orlop ground wire by 2 short circuit nails 7.2 short circuit nails all vertically pass in dielectric layer, and the short circuit nail is projected as circle at the upper strata metal covering, and is circular tangent with two interdigital ends that do not link to each other with sideband of outermost, and is positioned at interdigital.
Should the concrete electric property of implementing to realize be: centre frequency 8.75GHz, bandwidth of operation 1GHz, Figure 16, Figure 17 and Figure 18 were seen in 45 ° of phase shifts (± 0.5 °) when two pairs of on off states changed simultaneously.
Since this structure have 4 pairs totally 8 interdigital, therefore only be by about 1/8 of whole phase shifter electric current by the single interdigital electric current of going up the PIN switch, also less by the electric current of PIN switch on the sideband in addition, test through power capacity, the power capacity of finding this left hand microstrip transmission line phase shifter can reach 14.3W, is 5.72 times of single PIN switch power capacity.
Claims (3)
1, microwave phase shifter based on the plane type left hand microstrip transmission line structure, comprise the plane type left hand microstrip transmission line unit, this unit is printed circuit board (PCB) (PCB), its ground floor, the 3rd layer is conductive copper, the intermediate layer is that dielectric constant is the dielectric-slab of 1.07-13.6, on ground floor, there is planar metal microstrip interdigital structure to constitute interdigital capacitor, a pair of and interdigital vertical sideband is arranged at the two ends of interdigital capacitor, the 3rd layer of conductive copper constitutes the ground of left hand microstrip transmission line, select on the ground floor at least one sideband or any one interdigital, adopt the via hole technology by the short circuit nail formation inductance that will this three-layer metal ground interdigital or sideband and pcb board links to each other, it is characterized in that:
Establish one at the symmetric position place, center of a pair of interdigital symmetric position place, center that is positioned at symmetric position or a pair of sideband and align doping/intrinsic/negative doping diode (PIN) switch; The signal input and output port lays respectively on the symmetric position of a pair of sideband.
2, the microwave phase shifter that is used for plane type left hand microstrip transmission line according to claim 1 is characterized in that: establish one at a pair of interdigital symmetric position place, center of outermost that is positioned at symmetric position and align doping/intrinsic/negative doping diode (PIN) switch.
3, the microwave phase shifter that is used for plane type left hand microstrip transmission line according to claim 1 is characterized in that: establish one at symmetric position place, the center of a pair of sideband and align doping/intrinsic/negative doping diode (PIN) switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200416671U CN201153148Y (en) | 2007-11-28 | 2007-11-28 | Microwave phase shift device based on plane type micro-strip transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200416671U CN201153148Y (en) | 2007-11-28 | 2007-11-28 | Microwave phase shift device based on plane type micro-strip transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201153148Y true CN201153148Y (en) | 2008-11-19 |
Family
ID=40128823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200416671U Expired - Fee Related CN201153148Y (en) | 2007-11-28 | 2007-11-28 | Microwave phase shift device based on plane type micro-strip transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201153148Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197460B (en) * | 2007-11-28 | 2011-09-14 | 中国科学技术大学 | Microwave phase shifter based on plane type left hand microstrip transmission line |
| CN102569951A (en) * | 2012-02-14 | 2012-07-11 | 哈尔滨工业大学 | Micro electronic mechanical system (MEMS) load line type 2-bit phase shifter based on left-handed transmission line |
| CN107632193A (en) * | 2017-09-28 | 2018-01-26 | 东南大学 | A kind of microwave power detector based on metamaterial structure |
| CN110034379A (en) * | 2019-04-19 | 2019-07-19 | Oppo广东移动通信有限公司 | Antenna module and electronic equipment |
-
2007
- 2007-11-28 CN CNU2007200416671U patent/CN201153148Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197460B (en) * | 2007-11-28 | 2011-09-14 | 中国科学技术大学 | Microwave phase shifter based on plane type left hand microstrip transmission line |
| CN102569951A (en) * | 2012-02-14 | 2012-07-11 | 哈尔滨工业大学 | Micro electronic mechanical system (MEMS) load line type 2-bit phase shifter based on left-handed transmission line |
| CN107632193A (en) * | 2017-09-28 | 2018-01-26 | 东南大学 | A kind of microwave power detector based on metamaterial structure |
| CN110034379A (en) * | 2019-04-19 | 2019-07-19 | Oppo广东移动通信有限公司 | Antenna module and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101197460B (en) | Microwave phase shifter based on plane type left hand microstrip transmission line | |
| CN201623242U (en) | Microwave and millimeter wave multi-stub load line phase shifter | |
| EP2768072A1 (en) | Phase shifting device | |
| CN201153148Y (en) | Microwave phase shift device based on plane type micro-strip transmission line | |
| CN101359760B (en) | MEMS electromagnetic band gap adjustable band-stop filter applied to K wave band | |
| CN101300716B (en) | Polarization diversity antenna system | |
| CN104779448A (en) | RFID (radio frequency identification) antenna based on RF MEMS (radio frequency micro-electro-mechanical system) phase shifters | |
| CN107634345B (en) | A kind of high-gain gradual change slot array antenna suitable for 5G millimetre-wave attenuator | |
| US4749966A (en) | Millimeter wave microstrip circulator | |
| EP0534796B1 (en) | Broadband microstrip to slotline transition | |
| CN110235301B (en) | Liquid crystal-based high-frequency device and high-frequency switch | |
| CN113611991A (en) | Liquid crystal phase shifter, liquid crystal antenna and phase shifting method | |
| CN101335371A (en) | Ferroelectric film phase shifter and manufacturing method thereof | |
| CN100511827C (en) | Ferroelectric thin-membrane phase shifter, and method for detecting and optimizing reflection characteristics | |
| CN202737078U (en) | MEMS reconfigurable microwave directional coupler | |
| CN117013267A (en) | High-frequency band multifunctional active wave absorber with reflection polarization conversion | |
| CN101276950A (en) | Phase shifter of millimeter wave microelectromechanical system with rectangle bridge coplanar waveguide structure | |
| CN203775175U (en) | Absorption-type single-pole eight-throw switch | |
| CN100459281C (en) | Microwave power distributor made from lumped element left hand transmission line | |
| CN110416668A (en) | A kind of liquid crystal phase shifter | |
| US4754237A (en) | Switchable millimeter wave microstrip circulator | |
| CN102569951A (en) | Micro electronic mechanical system (MEMS) load line type 2-bit phase shifter based on left-handed transmission line | |
| Wang et al. | Design of a ku band six bit phase shifter using periodically loaded-line and switched-line with loaded-line | |
| CN221828154U (en) | Polarization reconfigurable magneto-electric dipole antenna | |
| CN201117767Y (en) | Ferroelectric Thin Film Phase Shifter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20091228 |