A linearly slotted waveguide antenna and comparison of it with a sinusoidal one

Alp Oral SALMAN

Article Details

A linearly slotted waveguide antenna and comparison of it with a sinusoidal one

Authors:

Alp Oral SALMAN

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2013 Vol.21 Issue 5, pp.1455-1464

Document Type:

Article

Publication Date:

4/2013

Document Language:

Turkish

Document ID (Org No.):

2000743239

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632

Abstract:

 

A linearly slotted waveguide antenna (LSWA) is investigated.   The slot is placed in one of the narrow faces of a rectangular   waveguide, which operates at Ka-band (26.5--40 GHz), which is in a frequency   range including upper microwaves and the lower edge of millimeter waves.   Analytically, the magnetic current approach is applied. Some antenna   parameters of this structure are experimentally measured and it is observed   that the antenna radiates a single transversal-polarized beam that scans   with frequency. The experimentally obtained patterns in 2 perpendicular   planes are also correlated with analytical and numerical patterns that use   the magnetic current model and HFSS, respectively. Approximate maximum   directivity and side lobe level of the antenna are 20 dBi and --10 dB,   respectively. In a frequency range of 23--35 GHz, efficiency above 75% is   obtained by this investigated antenna. Travelling wave parameters of the   antenna are also calculated. The antenna is a fast-wave structure and   exhibits frequency-scanning behavior with an average scanning rate of   2.14°/GHz. Some of the results of the investigated LSWA are also   compared with the results of the sinusoidal slotted waveguide antenna (SSWA)   investigated in a previous study by the author. The directivity and   efficiency of the linear slot is better than that of the sinusoidal slot,   while the other characteristics are similar. Thus, the LSWA exhibits a   better performance than the SSWA does if we consider the transversal   Ef polarization (SSWA has another polarization as well, which is   longitudinal Eq polarization). It is also concluded that this   frequency-scanning Ka-band LSWA can be used in telecommunications and radar   applications.

 

A linearly slotted waveguide antenna (LSWA) is investigated.   The slot is placed in one of the narrow faces of a rectangular   waveguide, which operates at Ka-band (26.5--40 GHz), which is in a frequency   range including upper microwaves and the lower edge of millimeter waves.   Analytically, the magnetic current approach is applied. Some antenna   parameters of this structure are experimentally measured and it is observed   that the antenna radiates a single transversal-polarized beam that scans   with frequency. The experimentally obtained patterns in 2 perpendicular   planes are also correlated with analytical and numerical patterns that use   the magnetic current model and HFSS, respectively. Approximate maximum   directivity and side lobe level of the antenna are 20 dBi and --10 dB,   respectively. In a frequency range of 23--35 GHz, efficiency above 75% is   obtained by this investigated antenna. Travelling wave parameters of the   antenna are also calculated. The antenna is a fast-wave structure and   exhibits frequency-scanning behavior with an average scanning rate of   2.14°/GHz. Some of the results of the investigated LSWA are also   compared with the results of the sinusoidal slotted waveguide antenna (SSWA)   investigated in a previous study by the author. The directivity and   efficiency of the linear slot is better than that of the sinusoidal slot,   while the other characteristics are similar. Thus, the LSWA exhibits a   better performance than the SSWA does if we consider the transversal   Ef polarization (SSWA has another polarization as well, which is   longitudinal Eq polarization). It is also concluded that this   frequency-scanning Ka-band LSWA can be used in telecommunications and radar   applications.

Article Details

A linearly slotted waveguide antenna and comparison of it with a sinusoidal one

Authors: Alp Oral SALMAN

Publisher: TUBITAK

Journal: Turkish Journal of Electrical Engineering and Computer Science 2013 Vol.21 Issue 5, pp.1455-1464

Document Type: Article

Publication Date: 4/2013

Document Language: Turkish

Document ID (Org No.): 2000743239

Frequency: Bimonthly

eISSN: 1303-6203

pISSN: 1300-0632

Issues

Authors:

Alp Oral SALMAN

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2013 Vol.21 Issue 5, pp.1455-1464

Document Type:

Article

Publication Date:

4/2013

Document Language:

Turkish

Document ID (Org No.):

2000743239

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632