Antenna systems and special requirements

Antenna systems and special requirements

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So far we have mainly discussed flat slotted waveguide array antennas consisting of rectangular waveguides, typically with slots in the broad wall, radiating a fixed narrow beam. Many other configurations are possible, however, and even more suitable in special cases. In this chapter we will investigate how slotted waveguide arrays are used in system applications where more advanced antenna functions or special configurations are required. As this is a very broad subject we will concentrate on cases where advantages and perhaps difficulties are of particular interest.

Chapter Contents:

  • 9.1 Phase scanned slotted waveguide arrays
  • 9.2 Frequency scanned slotted waveguide arrays
  • 9.2.1 Travelling wave linear array
  • 9.2.2 Phase reversal travelling array
  • 9.2.3 Resonant series feed array
  • 9.2.4 Centre-fed travelling array
  • 9.3 Dual polarised slotted waveguide arrays
  • 9.4 Multiple beam slotted waveguide arrays
  • 9.5 Conformal slotted waveguide arrays
  • 9.6 Monopulse slotted waveguide arrays
  • 9.7 Stripline slotted arrays
  • 9.7.1 Introduction
  • 9.7.2 Independent excitations
  • 9.8 Scattering from slotted waveguide arrays
  • 9.8.1 Introduction
  • 9.8.2 Scattering by a single slot in a planar ground plane
  • 9.8.3 Scattering from an array of slots
  • 9.8.4 The feeding network
  • 9.8.5 Numerical examples
  • 9.8.6 Spatial filters
  • 9.9 Second-order lobes
  • 9.9.1 Introduction
  • 9.9.2 Analysis
  • 9.9.3 Reducing the secondary lobes
  • 9.10 Omnidirectional slotted waveguide array antennas
  • 9.10.1 Slotted rectangular waveguide array
  • 9.10.2 Slotted circular waveguide array
  • 9.10.3 The pattern ripple problem
  • 9.11 On the bandwidth of slotted waveguide array antennas
  • 9.11.1 Introduction
  • 9.11.2 The slot itself
  • 9.11.3 The waveguide-fed longitudinal slot
  • 9.11.4 The linear resonant array antenna
  • 9.11.5 Overloading
  • 9.11.6 Mutual coupling
  • 9.11.7 The planar array and feeding arrangements
  • 9.11.8 Travelling wave arrays
  • References

Inspec keywords: slot antenna arrays; rectangular waveguides

Other keywords: fixed narrow beam; flat slotted waveguide array antennas; antenna systems; advanced antenna functions; rectangular waveguides

Subjects: Waveguides and microwave transmission lines; Antenna arrays

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