Wideband aperture-fed patch antenna element: Wideband aperture-fed patch antenna element.rar

Wideband aperture-fed patch antenna element

Table of contents
1 Introduction ..........................................................................6
2 Technical requirements........................................................8
2.1 Frequency range requirement.................................................................8
2.2 Return Loss requirement ........................................................................8
2.3 Polarization and back-radiation...............................................................8
2.4 Azimuth Lobe width requirement ............................................................9
2.5 Ground plane constraints and profile ......................................................9
2.6 Vertical element distance........................................................................9
3 Theory ................................................................................10
3.1 Brief repetition of Maxwell’s equations and the constitutive relations ...10
3.2 Plane wave propagation .......................................................................11
3.2.1 Transversal electromagnetic waves...................................................................11
3.2.2 Characteristic impedance and the transmission line model...............................11
3.2.3 Reflection in transmission lines..........................................................................13
3.2.4 S-parameters .....................................................................................................15
3.3 The Smith chart ....................................................................................16
3.4 Transmission line components .............................................................17
3.4.1 Adding a serial line.............................................................................................17
3.4.2 The quarter-wave-transformer ...........................................................................18
3.4.3 The stub .............................................................................................................19
3.5 The Patch antenna ...............................................................................20
3.5.1 The aperture-coupled patch antenna.................................................................20
3.5.2 The proximity-coupled patch..............................................................................20
3.5.3 Microstrip-fed patch............................................................................................21
3.6 Theory of the patch antenna .................................................................21
3.6.1 The stripline model.............................................................................................21
3.6.2 The cavity model ................................................................................................23
3.6.3 Radiation patterns ..............................................................................................26
4 Literature searching and concept study .............................27
4.1 Searching for articles ............................................................................27
4.2 Concept study.......................................................................................27
5 Simulations.........................................................................29
5.1 Simulation tool IE3D .............................................................................29
5.2 Simulation tool ADS..............................................................................30
5.3 Tuning methodology .............................................................................30
5.4 Simulations of antenna 1: Broadband aperture-coupled T-shaped
microstrip-fed triangular patch antenna ................................................32
5.5 Study of antenna 2: large bandwidth rectangular microstrip-fed
inserted triangular patch in a circular slot antenna. ..............................33
5.6 Simulations of antenna 3: Broadband air-filled stacked U-slot patch
antenna.................................................................................................35
5.7 Simulations of antenna 4: Broadband patch antenna with ring slot
coupling ................................................................................................36
5.7.1 Simulations without profile .................................................................................37
5.7.2 Simulations with model of aluminium profile ......................................................38
5.7.3 Final simulation ..................................................................................................40
5
5.8 Radiation pattern simulations of the hourglass-shaped ring-slot antenna.
.............................................................................................................40
5.8.1 Simulation results .............................................................................................. 41
5.8.2 A more accurate model of the box..................................................................... 43
6 Matching measurements ................................................... 45
6.1 Tuning of the SMA connector. ..............................................................45
6.2 Measurements at the single patch antenna element............................46
6.2.1 Detailed description of the single patch antenna............................................... 48
6.3 The double-patch stacked antenna ......................................................48
6.3.1 Design of the stacked patch .............................................................................. 48
6.3.2 A detailed description of the stacked antenna................................................... 51
6.3.3 Making a copy.................................................................................................... 51
6.3.4 Additional stacked antennas.............................................................................. 52
6.4 Patch terminated feedline and aperture-fed patch above
(semi-stacked patch antenna) ..............................................................53
6.4.1 Matching network............................................................................................... 53
6.4.2 Making a copy.................................................................................................... 55
6.4.3 Detailed description of the semi-stacked antenna............................................. 56
7 Radiation pattern ............................................................... 57
7.1 Single patch antenna............................................................................58
7.1.1 Patterns of a wider patch antenna..................................................................... 59
7.2 The stacked patch antenna ..................................................................60
7.3 The semi-stacked patch antenna .........................................................61
7.4 Lobe width summary ............................................................................62
8 Comparison between simulations and reality .................... 63
9 Conclusions ....................................................................... 67
9.1 Comparison of the antennas ................................................................67
9.1.1 Single patch antenna ......................................................................................... 67
9.1.2 Stacked patch antenna ...................................................................................... 67
9.1.3 Semi-stacked patch antenna ............................................................................. 68
9.2 Simulations vs. laboratory results.........................................................68
9.3 Proposed future work ...........................................................................69
10 References ........................................................................ 70
A Additional radiation patterns .............................................. 71
A.1 Single patch elevation patterns ............................................................71
A.2 Stacked patch elevation patterns .........................................................72
A.3 Semi-stacked patch elevation patterns.................................................73
A.4 Simulated cross-polarisation for the whole sphere ...............................74
B Simulations of antennas with narrower lobe...................... 76
B.1 Vertically polarized 45°lobe antenna ....................................................76
B.2 Horizontally polarized 45° lobe antenna ...............................................77

:11bb

好書好書
感謝OOd44分享
好久不見囉．．．．．

最近正研究这个东西呢

呆呆真是及时雨哦！

谢谢楼主!:27bb :29bb

Wideband aperture-fed patch antenna elemen IS GOOD BOOK ,THANK YOU

thank you !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

哇，好书，好书:27bb :27bb :27bb

:45bb :45bb :45bb

好书，谢谢分享

嘿嘿谢谢lz 经典书籍要好好保存的

感谢楼主分享哈，多谢了哈

谢谢分享 {:6_939:}

:31bb :50bb

好书，谢谢！

Wideband aperture-fed patch antenna element
a good book

Thanks a lot

一份不错的缝隙天线论文。谢谢楼主。{:7_1247:}