Contents & References of Design, simulation and construction of a new microstrip antenna with the ability to control multiple frequency bands
List:
Chapter 1 Microstrip antennas, their definition and structure
Definition of microstrip antenna 1.
Advantages and disadvantages of microstrip antennas. 1
Types of microstrip antennas. 2
Microstrip patch antennas. 3
Microstrip dipole antennas. 4
Microstrip slot antennas. 4
Waving microstrip antennas. 5
Applications of microstrip antennas. 7
Types of feeding methods for microstrip antennas. 8
Microstrip line. 8
Coaxial probe. 9
Proximity coupling 10. Aperture coupling. 12. Waveguide feeding. 13. Microstrip antenna analysis methods. 13. Transmission line model. 14. Lip effects. 14. Effect of effective length on resonance frequency. 16. Microstrip antenna design. 17
The housing model. 18
B
Arranging the fields (modes)- 19
Density of equivalent currents. 23 Important parameters in checking the performance of microstrip antennas. 27
Frequency bandwidth (impedance). 27
Radiation pattern. 28
Directionality and gain. 28
Input impedance in microstrip antenna. 29
Increase Bandwidth of microstrip antennas.30
Chapter Two Introduction of microstrip and printed monopole slot antennas
Slot antenna..33
Introduction of slot antenna. 33
Feeding methods of microstrip slot antennas. 34
Design of slot antenna fed with microstrip line. 36
Broadbanding methods of microstrip slot antennas. 36
Introduction of types of microstrip slot antennas. 37
Square ring slot antenna. 37
Circular ring slot antenna. 38
Narrowing slot antenna. 39
Monopole antenna. 47
Conclusion .. 50
T
Chapter 3 Types of combined monopole-slot antennas (Monopole - Slot Antenna)
Introduction .. 52
First type antenna .. 53
First structure: slot 53
Second structure: L-shaped slot with three different modes for feeding. 54
Third structure: T-shaped slot with horizontal feed line. 57
Fourth structure: two L-slots with two vertical-diagonal combined feeding. 58
Second type antenna. ..67
The fourth chapter of quasi-monopolar microstrip antenna with two broad bands and frequency response control capability
Abstract..68
Introduction ..69
Antenna design and parametric study. 70
4-3-1 Design and practical results of quasi-monopolar microstrip antenna with two broad bands. 70
4-3-2 Design and practical results of pseudo-monopolar microstrip antenna with two wide bands and frequency response control capability
..82
Chapter Five General conclusion and suggestions for future studies
4-4 General conclusion.85
4-5 Suggestions for future studies.86
References ..87
Th
Forms list
Chapter 1 Microstrip antennas, their definition and structure
Figure 1-1 Simple microstrip antenna configuration. 1
Figure 1-2 Different forms for microstrip patch. 3
Figure 1-3 Dipole antenna with proximity feeding. 4
Figure 4-1 Some examples of microstrip slot antenna structures. 5
Figure 5-1 Different types of wave microstrip antennas. 6
Figure 1-6 Feeding by the method of microstrip line in the form of an edge and its equivalent circuit. 9
Figure 1-7 Feeding by the method of microstrip line through a slot and its equivalent circuit. 9
Figure 1-8 Antenna with feeding by the coaxial cable method: (a) Antenna schematic. (b) Equivalent feeding circuit 10. Figure 9-1 Antenna with electromagnetic coupling feeding: (a) antenna scheme. (b) Feeding equivalent circuit. 11
Figure 1-10 Antenna with aperture feeding: (a) Antenna scheme. (b) Feeding equivalent circuit. 12
Figure 11-1 Antenna with waveguide feeding. 13
Figure 12-1 Microstrip line and its corresponding electric field lines. 15
Figure 1-13 Dielectric constant affecting15
Figure 13-1 Effective dielectric constant based on frequency for common substrates. 16
Figure 14-1 Physical and effective length of rectangular microstrip antenna. 16
Figure 15-1 Charge distribution and formation of current density on microstrip patch. 18
Figure 16-1 Microstrip patch antenna geometry 20
Figure 1-17 Geometry of rectangular microstrip patch antenna. 23
Figure 18-1 Equivalent current density on four sides of patch antenna with and without flat ground. 24
Figure 1-19 Radiation slots in rectangular microstrip antenna and equivalent magnetic current densities. 26
Figure 20-1 The common pattern in plates E and H related to each of the radiating grooves and the sum of both of them. 26
C
Figure 21-1 Current density on the non-radiating grooves in the rectangular microstrip antenna. 27
Figure 22-1 The resistance and reactance change curve of a microstrip antenna according to Frequency. 29
Figure 23-1 The effect of change in thickness and dielectric constant on VSWR<2 impedance bandwidth and radiation efficiency. 32
Chapter Two Introduction of printed microstrip and monopolar slot antennas
Figure 2-1 Field distribution on the slot. 34
Figure 2-2 Slot antenna with microstrip line feeding: (a) Antenna scheme and short circuit end method. (b) Open circuit end method. 35
Figure 3-2 Methods of reducing the radiation resistance seen by microstrip line feeding. 35
Figure 4-2 Important parameters in slot antenna design. 36
Figure 2-5 Square ring slot antenna. 37
Figure 2-6 Square ring slot antenna with return loss curve diagram resulting from the optimal antenna parameters. 38
Figure 2-7 Fractal square ring slot antenna in the form of a peninsula and its return loss curve. 38
Figure 2-8 Ring slot antenna. .39
Figure 2-9 Tapered slot antenna. 40. Figure 2-10 Types of tapering antennas. (a) Vivaldi (b) LTSA (c) CWSA 44. Figure 2-13 S11 diagram for different values ??of L1 (= 1 W1 mm). 45
Figure 2-14 S11 diagram for different values ??of L2 (= 6 W2 mm). 46
Figure 2-15 S11 diagram for different values ??of W2 (= 1 L2 mm).
Figure 2-16 Printed monopole antenna with three horns feeding. 49
H
Figure 2-17 The results of measurement and computer analysis of the VSWR parameter for the monopole antenna presented in [27]. 49
Figure 2-18 of radiation patterns measured in H-plane for the monopole antenna presented in [27], for the frequencies: a) 3 GHz, b) 7 GHz, c) 11 GHz and d) 15 GHz. 50
Chapter 3 Types of monopole-slot hybrid antennas (Monopole - Slot) Antenna) Figure 3-1 Single-pole-slit antenna with a rectangular slot on the FR4 board: (a) antenna structure and (b) its return loss diagram. 53. Figure 3-2 Return loss diagram of a single-pole slot antenna with a rectangular slot on a substrate with a dielectric constant equal to 2.5 and very low loss. 54 Figure 3-3 Structure of a slotted antenna with a slot L shape and three different modes for microstrip feed line. 55
Figure 3-4 Return loss parameter for three different modes Figure 3-3.56
Figure 3-5 Return loss parameter for Figure 3-3-a with substrates with dielectric constant 2.5 and negligible losses. 56
Figure 3-6 Slotted antenna with T-shaped slot and horizontal feed line: a) Antenna structure. b) return loss diagram for FR4 substrate and c) return loss diagram for substrate with dielectric constant 2.5 and low loss. 57
Figure 7-3 Slotted antenna with two L-shaped slots and a pair of vertical-diagonal combined feeding line. 58
Figure 3-8 Combined monopole-slotted antenna Reference [30]: a) Antenna structure (top view). b) The structure of the antenna (view from the side of the antenna) and c) Dimensions and placement of two rectangular and L-shaped slots on the ground plane of the antenna. 59. Figure 9-3 Return loss diagram of the antenna in Figure 8-3 with dimensions specified in that figure for measurement and simulation situations. 60
Figure 10-3 The return loss diagram of the antenna of Figure 8-3 and comparing it with the cases where only each of the slots exists at the same time. 61
Figure 11-3 The structure of the proposed antenna of the third type.