1. Elliott RS (1983) An improved design procedure for small arrays of shunt slots. IEEE Trans Antennas Propag 31:48–53CrossRefGoogle Scholar
2. Elliott RS, Kurtz LA (1978) The design of small slot arrays. IEEE Trans Antennas Propag 26:214–219CrossRefGoogle Scholar
3. Josefsson LG (1987) Analysis of longitudinal slots in rectangular waveguide. IEEE Trans Antennas Propag 35:1351–1357CrossRefGoogle Scholar
4. Khac TV, Carson CT (1973) Impedance properties of a longitudinal slot antenna in the broad face of a rectangular waveguide. IEEE Trans Antennas Propag 21:708–710CrossRefGoogle Scholar
5. Kurtz LA, Yee JS (1957) Second-order beams of two-dimensional slot arrays. IRE Trans Antennas Propag 5:356–362CrossRefGoogle Scholar
6. Lyon RW, Sangster AJ (1981) Efficient moment method analysis of radiating slots in a thick-walled rectangular waveguide. IEE Proc 128(pt.H):197–205Google Scholar
7. Maxum BJ (1960) Resonant slots with independent control of amplitude and phase. IRE Trans Antennas Propag 8:383–388CrossRefGoogle Scholar
8. Oliner AA (1957) The impedance properties of narrow radiating slots in the broad wall of rectangular waveguide. IRE Trans Antennas Propag 5:1–20CrossRefGoogle Scholar
9. Park SH, Hirokawa J, Ando M (2003) Simple analysis of a slot with a reflection-canceling post in a rectangular waveguide using only the axial uniform currents on the post surface. IEICE Trans Commun 86(8):2482–2487Google Scholar
10. Rangarajan SR (1989) Compound radiating slots in a broad wall of a rectangular waveguide. IEEE Trans Antennas Propag 37:1116–1123CrossRefGoogle Scholar
11. Sakakibara K, Hirokawa J, Ando M, Goto N (1994) A linearly-polarized slotted waveguide array using reflection-canceling slot pairs. IEICE Trans Commun 77:511–518Google Scholar
12. Sakakibara K, Hirokawa J, Ando M, Goto N (1996) Periodic boundary condition for evaluation of external mutual coupling in a slotted waveguide arrays. IEICE Trans Commun 79:1156–1164Google Scholar
13. Sakakibara K, Kimura Y, Akiyama A, Hirokawa J, Ando M, Goto N (1997) Alternating phase-fed waveguide slot arrays with a single-layer multiple-way power divider. IEE Proc Microw Antennas Propag 144:425–430CrossRefGoogle Scholar
14. Seki H, Goto N (1981) Synthesis of circular polarization with non resonant slots in the narrow wall of a rectangular waveguide. Trans IECE 64(pt.B):1000–1007Google Scholar
15. Stegen RJ (1971) Longitudinal shunt slot characteristics, Technical report 261, Hughes technical memorandumGoogle Scholar
16. Stern GJ, Elliott RS (1985) Resonant length of longitudinal slots and validity of circuit representation: theory and experiment. IEEE Trans Antennas Propag 33:1264–1271CrossRefGoogle Scholar
17. Stevenson AF (1948) Theory of slots in rectangular waveguides. J Appl Phys 19:24–38MathSciNetCrossRefGoogle Scholar
18. Watson WH (1946) Resonant slots. IEE J 93(pt.3A):747–777Google Scholar
19. Watson WH (1947) The physical principles of wave guide transmission and antenna system. Oxford University PressGoogle Scholar
20. Yee HY (1974) Impedance of a narrow longitudinal shunt slot in a slotted waveguide array. IEEE Trans Antennas Propag 22:589–592CrossRefGoogle Scholar
21. Zhang M, Hirokawa J, Ando M (2011) Full-wave design considering slot admittance in 2-D waveguide slot arrays with perfect input matching. IEICE Trans Commun 94:725–734CrossRefGoogle Scholar

1. Waveguide Slot Antenna Arrays Ham Radio

• Category:New Products, Antennas

Antenna arrays made up of hundreds or even thousand elements are often slotted waveguides similar to those described above.

M.E.C.’s X390-638 (16-Element) and X390-645 (36-Element) are X-band, waveguide slot array antennas possessing a high power handling capability. These lightweight, low-profile antennas provide a directional beam with high efficiency and are suitable for a variety of multipurpose radar applications.

For the same size, slotted waveguide array antennas are more efficient than any other planar antenna. Versatility in slot feeding options, ease of weather-proofing and mechanical stability make slotted antennas well-suited for military and defense applications. A waveguide slot array antenna for radiating electromagnetic energy in a single beam comprising a plurality of waveguides (51-59), each waveguide (51-59) having slots (110 and 112) spaced at first and second spacings to provide a single beam. The invention overcomes the problem of grating lobes occurring at certain angles for the main beam.

The procedure to design a waveguide slot array antenna is explained, and also the analysis model to design the element is discussed as well as the scattering matrix in connecting the equivalent. This paper discusses the design, analysis, and development of waveguide-fed planar slot arrays to achieve low-average-sidelobe specifications, as may arise in radiometer applications. Such antennas may be required to meet strict average sidelobe levels in different angular regions, and low average return loss over a specified bandwidth.

• High Power
• Compact Design
• Lightweight
• High Directivity

X390-638 (Specifications & Radiation Pattern)

X390-645 (Specifications & Radiation Pattern)

Order and Sales Information

Waveguide Slot Antenna Arrays Ham Radio

(1) Please contact M.E.C. with your specific requirements. All customer designs are welcome.