Based on the analysis of the single-slot antenna in the previous chapters we can now approach the problem of designing linear and planar slot arrays. We will first study longitudinal slot arrays and start with the simple case with one row of slots in a rectangular waveguide. For this case mutual coupling appears mainly in the H-plane and can in many cases be neglected. Some examples of computed and measured performance will be presented. Procedures for designing linear arrays of slots, including some examples, will be discussed.

Chapter Contents:

• 6.1 Introduction
• 6.1.1 Overview of design approaches
• 6.2 The accuracy of the slot array model
• 6.2.1 Slot model
• 6.2.2 Network model
• 6.2.3 Ground plane
• 6.2.4 Mutual coupling
• 6.3 The Elliott design equations
• 6.3.1 The first design equation
• 6.3.2 The second design equation
• 6.3.3 The iterative design algorithm for standing wave arrays
• 6.4 Mutual coupling
• 6.4.1 Efficient computation of the external mutual coupling terms
• 6.4.2 The self-admittance
• 6.4.3 Internal TE20 mode coupling
• 6.4.4 Full wave analysis
• 6.4.5 Mutual coupling compensation
• 6.5 Design example of a standing wave array
• 6.5.1 Slot data needed for the design algorithm
• 6.5.2 Design of a – 30 dB sidelobe-level Dolph–Chebyshev array
• 6.6 Design of a travelling wave array
• 6.6.1 Design equations for travelling wave array
• 6.6.2 Design algorithm
• 6.6.3 Example of a 21-element travelling wave array
• 6.7 Array design using the concept of incremental conductance
• 6.8 Array design in terms of scattering parameters
• 6.9 Improvement to Elliott's design procedure
• References

Inspec keywords: linear antenna arrays; rectangular waveguides; slot antenna arrays

Other keywords: single-slot antenna analysis; longitudinal slot arrays; rectangular waveguide; linear slotted waveguide array antenna; H-plane; planar slot array design; mutual coupling

Subjects: Waveguides and microwave transmission lines; Antenna arrays