Author: Junping Geng
Publisher: Springer Nature
ISBN: 9811590893
Category : Technology & Engineering
Languages : en
Pages : 188
Book Description
Omnidirectional antenna with high gain, low profile, vertical polarization, even CP polarization is very difficult to design, although it is from the dipole. In this book, a novel idea that the running wave in the coaxial wire is disturbed by the orthogonal slot array on the cylindrical metal shell is introduced, which radiates the CP wave in omni-direction. When feeding on two ends of the coaxial wire respectively, there will appear left hand circularly polarized (LHCP) omnidirectional radiation or right hand circularly polarized (RHCP) omnidirectional radiation. By introducing the T-shaped feed structure, the coaxial wire with slot array can conveniently produce the LHCP and RHCP radiation diversity with one end feeding. In the further, combining with the directional antenna, it will generate the pattern diversity in the half-sphere space. The antenna of the coaxial wire with slot array can further transform into conical CP beam antenna if the coaxial wire becomes into a conical frustum. By introducing the PIN diode into the slot, the antenna of the coaxial wire with slot array can radiate the reconfigurable directional beam by switching the states of the PIN diodes. By introducing a novel switchable microwave circuit, the omnidirectional /directional pattern switchable antenna can be realized easily.This book proposes a continues method to develop the potentialities of the omnidirectional antenna. And the readers can study the method or ideas of the omnidirectional slots antenna, even graft the CP or diversity methods to other antennae.
Omnidirectional Slots Antenna
Author: Junping Geng
Publisher: Springer Nature
ISBN: 9811590893
Category : Technology & Engineering
Languages : en
Pages : 188
Book Description
Omnidirectional antenna with high gain, low profile, vertical polarization, even CP polarization is very difficult to design, although it is from the dipole. In this book, a novel idea that the running wave in the coaxial wire is disturbed by the orthogonal slot array on the cylindrical metal shell is introduced, which radiates the CP wave in omni-direction. When feeding on two ends of the coaxial wire respectively, there will appear left hand circularly polarized (LHCP) omnidirectional radiation or right hand circularly polarized (RHCP) omnidirectional radiation. By introducing the T-shaped feed structure, the coaxial wire with slot array can conveniently produce the LHCP and RHCP radiation diversity with one end feeding. In the further, combining with the directional antenna, it will generate the pattern diversity in the half-sphere space. The antenna of the coaxial wire with slot array can further transform into conical CP beam antenna if the coaxial wire becomes into a conical frustum. By introducing the PIN diode into the slot, the antenna of the coaxial wire with slot array can radiate the reconfigurable directional beam by switching the states of the PIN diodes. By introducing a novel switchable microwave circuit, the omnidirectional /directional pattern switchable antenna can be realized easily.This book proposes a continues method to develop the potentialities of the omnidirectional antenna. And the readers can study the method or ideas of the omnidirectional slots antenna, even graft the CP or diversity methods to other antennae.
Publisher: Springer Nature
ISBN: 9811590893
Category : Technology & Engineering
Languages : en
Pages : 188
Book Description
Omnidirectional antenna with high gain, low profile, vertical polarization, even CP polarization is very difficult to design, although it is from the dipole. In this book, a novel idea that the running wave in the coaxial wire is disturbed by the orthogonal slot array on the cylindrical metal shell is introduced, which radiates the CP wave in omni-direction. When feeding on two ends of the coaxial wire respectively, there will appear left hand circularly polarized (LHCP) omnidirectional radiation or right hand circularly polarized (RHCP) omnidirectional radiation. By introducing the T-shaped feed structure, the coaxial wire with slot array can conveniently produce the LHCP and RHCP radiation diversity with one end feeding. In the further, combining with the directional antenna, it will generate the pattern diversity in the half-sphere space. The antenna of the coaxial wire with slot array can further transform into conical CP beam antenna if the coaxial wire becomes into a conical frustum. By introducing the PIN diode into the slot, the antenna of the coaxial wire with slot array can radiate the reconfigurable directional beam by switching the states of the PIN diodes. By introducing a novel switchable microwave circuit, the omnidirectional /directional pattern switchable antenna can be realized easily.This book proposes a continues method to develop the potentialities of the omnidirectional antenna. And the readers can study the method or ideas of the omnidirectional slots antenna, even graft the CP or diversity methods to other antennae.
A Quasi-omnidirectional Slot Array Antenna for Spacecraft Use at Microwave Frequencies
Author: W. F. Croswell
Publisher:
ISBN:
Category : Aperture antennas
Languages : en
Pages : 66
Book Description
Publisher:
ISBN:
Category : Aperture antennas
Languages : en
Pages : 66
Book Description
Omnidirectional Slots Antenna
Author: 耿军平
Publisher:
ISBN: 9787313271877
Category : Antenna radiation patterns
Languages : en
Pages : 0
Book Description
Publisher:
ISBN: 9787313271877
Category : Antenna radiation patterns
Languages : en
Pages : 0
Book Description
Omnidirectional Slot Antenna Arrays
Author: Stanley Irving Cohn
Publisher:
ISBN:
Category :
Languages : en
Pages : 91
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 91
Book Description
Omni-directional Annular-slot Antennas (section I). Matching Networks for Annular Slot Antennas (section Ii).
Author: R. W. BICKMORE
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
Book Description
A Quasi-omnidirectional Slot Array Antenna for Spacecraft Use at Microwave Frequencies
Author: W. F. Croswell
Publisher:
ISBN:
Category :
Languages : en
Pages : 56
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 56
Book Description
Omni-directional Annular Slot Antennas
Author: Robert William Bickmore
Publisher:
ISBN:
Category :
Languages : en
Pages : 60
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 60
Book Description
A Theoretical and Experimental Investigation of Combinations of Slot and Linear Antennas
Author: Stuart A. Long
Publisher:
ISBN:
Category : Antenna radiation patterns
Languages : en
Pages : 64
Book Description
The combination of a linear antenna and a slot antenna can be used to provide a relatively isotropic radiation pattern when the dipole is perpendicular to the plane of the slot. The theoretical far field radiation pattern of a dipole flanked by a two-element array of slot antennas is formulated. The fields for a variety of relative phasings between the elements of the combination antenna are calculated and the degree of approximation to an isotropic source in the sense of the total field noted. An experimental antenna was fabricated and the radiated fields measured with good agreement found with the theoretical formulas. (Author).
Publisher:
ISBN:
Category : Antenna radiation patterns
Languages : en
Pages : 64
Book Description
The combination of a linear antenna and a slot antenna can be used to provide a relatively isotropic radiation pattern when the dipole is perpendicular to the plane of the slot. The theoretical far field radiation pattern of a dipole flanked by a two-element array of slot antennas is formulated. The fields for a variety of relative phasings between the elements of the combination antenna are calculated and the degree of approximation to an isotropic source in the sense of the total field noted. An experimental antenna was fabricated and the radiated fields measured with good agreement found with the theoretical formulas. (Author).
Omnidirectional Circularly Polarized Antenna with High Gain in Wide Bandwidth
Author: Bin Zhou
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
Book Description
A novel omnidirectional circularly polarized (CP) slot array antenna with high gain is proposed, which is based on the coaxial cylinder structure, and the orthogonal slots radiated the circular polarization wave around the cylinder. Further, the improved dual circularly polarized (CP) omnidirectional antenna based on slot array in coaxial cylinder structure is presented too, and two ports are assigned in its two side as left hand circularly polarized (LHCP) port and right hand circularly polarized (RHCP) port, respectively. The simulation and experiment results show their novelty and good performance of omnidirectional circular polarization with about 5 dBi gain in 5.2-5.9 GHz.
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
Book Description
A novel omnidirectional circularly polarized (CP) slot array antenna with high gain is proposed, which is based on the coaxial cylinder structure, and the orthogonal slots radiated the circular polarization wave around the cylinder. Further, the improved dual circularly polarized (CP) omnidirectional antenna based on slot array in coaxial cylinder structure is presented too, and two ports are assigned in its two side as left hand circularly polarized (LHCP) port and right hand circularly polarized (RHCP) port, respectively. The simulation and experiment results show their novelty and good performance of omnidirectional circular polarization with about 5 dBi gain in 5.2-5.9 GHz.
Modern Antenna Systems
Author: Mohammad Abdul Matin
Publisher: BoD – Books on Demand
ISBN: 9535129252
Category : Technology & Engineering
Languages : en
Pages : 222
Book Description
The field of antenna engineering has been advancing at a remarkable pace to support modern communication systems. Recently, significant progress has been made in the development of new antennas and techniques targeted for applications in medical, defense, health care, communication, etc. The motivation of this project is to present cutting-edge research materials in the field of antennas for modern wireless communication.
Publisher: BoD – Books on Demand
ISBN: 9535129252
Category : Technology & Engineering
Languages : en
Pages : 222
Book Description
The field of antenna engineering has been advancing at a remarkable pace to support modern communication systems. Recently, significant progress has been made in the development of new antennas and techniques targeted for applications in medical, defense, health care, communication, etc. The motivation of this project is to present cutting-edge research materials in the field of antennas for modern wireless communication.