Huan He, Wen-Song Wang. Low profile cavity-embedded ultra-wideband UHF array antenna with end-fire beams[J]. Journal of Electronic Science and Technology, 2024, 22(2): 100258

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- Journal of Electronic Science and Technology
- Vol. 22, Issue 2, 100258 (2024)

Fig. 1. Configuration of the proposed log-periodic top-hat monopole array antenna: (a) perspective view of the array antenna element; (b) side view of the array antenna element; (c) perspective view of the proposed antenna array without cavity embedding.

Fig. 2. Configuration of the proposed 1×16 linear array within a cavity.

Fig. 3. Simulated peak realized gain and active VSWR of the array.

Fig. 4. Radiation patterns of the proposed scanning array in (a) XOY plane and (b) YOZ plane.

Fig. 5. Electric field distributions in front of the array at the center operating frequency 600 MHz: (a) embedded into a cavity and (b) without cavity embedding.

Fig. 6. The scanning performance of the proposed array in horizontal planes: (a) 300 MHz, (b) 500 MHz, (c) 700 MHz, and (d) 900 MHz.

Fig. 7. Prototype and measurement of the proposed end-fire antenna element and cavity-embedded array: (a) top view and (b) side view of the end-fire antenna element; (c) radiation pattern measurement setup for the cavity-embedded 1×2 linear array.

Fig. 8. Simulated and measured VSWRs of the proposed end-fire array element.

Fig. 9. Realized gain and radiation efficiency of the end-fire array element.

Fig. 10. Simulated and measured normalized radiation patterns of the proposed array element: (a) XOY plane@500 MHz, (b) YOZ plane@500 MHz, (c) XOY plane@700 MHz, (d) YOZ plane@700 MHz, (e) XOY plane@900 MHz, and (f) YOZ plane@900 MHz.

Fig. 11. Simulated and measured VSWRs of the cavity-embedded 1×2 linear array.

Fig. 12. Realized gain and radiation efficiency of the cavity-embedded 1×2 linear array.

Fig. 13. Simulated and measured normalized radiation patterns of the proposed array: (a) XOY plane@300 MHz, (b) YOZ plane@300 MHz, (c) XOY plane@500 MHz, (d) YOZ plane@500 MHz, (e) XOY plane@700 MHz, (f) YOZ plane@700 MHz, (g) XOY plane@900 MHz, and (h) YOZ plane@900 MHz.
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Table 1. Performance comparison of end-fire antennas with vertical polarization radiation patterns.

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