(2002).hwp

Transcription

1 - Conical-Cylindrical Compound Monopole Antenna

2 - Conical Cylindrical Compound Monopole Antenna

3

4 Abstract List of tables List of figures End cap

5 Conical-Cylindrical Compound Monopole Antenna Park, Seong bae Department of Radio Engineering Graduate School, Chungbuk National University Cheongju, Korea Supervised by Professor Ahn, Bierng Chearl Abstract In this study, it is suggested design of a Conical-Cylindrical compound monopole antenna. The dependence of the antenna performance on various geometric parameters is investigated using a commercial electromagnetic software, from which an optimum design of a conica-cylindricall monopole antenna is derived. Guideline for determining initial parameter values are given. The diameter of the circular ground plane is minimized to 1/5 wavelength at the lowest operating frequency. The antenna impedance matching is controlled by adjusting the gap between the plate and the ground plane, the conical monopole base width, and the base bevel angle. The antenna proposed in this study shows a reflection coefficient loss than -10dB and a dbi gain over 3-30GHz frequencies. The antenna shows symmetrical radiation pattern in an azimuth angle because of a conical design. The designed antenna was made of a SMA - type connector and conical-type aluminum with inside space for light weight. Finally, the designed antenna is 25mm 35mm include of a ground plane.

6 List of Tables 1-34

7 List of Figures (W) 6 3. (B) 7 4. (G) 8 5. (α) 8 6. (D) 9 7. (D) (P) (P) (P) θ= End cap z z z D

8 E-plane H-plane theta ( GHz) Far-Field E-Field (3,1-10.6GHz) Far-Field E-Field Far-Field 44

9 . Ultra Wide-Band(UWB) Radio. UWB,. UWB FCC. UWB GHz, [1]-[5]. [6]-[7]. UWB.... [8]-[13]. Honda Zisler Honda [9]-[10]. 2 : 1.

10 . (omnidirectional).., [14]-[17]. (null).. [18]-[23] CST Microwave Studio(MWS ) /5 20mm. 25mm 35mm. II -. III,,

11 . IV.

12 db 10 : (W), (L), (B), (G), (α), (D), (P), (t), (C). (α) (G), (B).

13 (a) (b) W 3 GHz 1/4 25mm L P 30 mm. (D) 3 GHz 0.2λ (πd/λ=0.63) 20 mm. B = 3 mm, G = 1.5 mm, α = 57, P = 13 mm, C= 2 mm, t = 3 mm. 2a = 1.3 mm, 2b = 4.1 mm, r = 2±

14 (W). (P) (W) (L). 2. (W) 2 W. W. -10 db 10 : 1 W = 25 mm. (B) 3. (B) 3 mm 3 mm 7 mm 2 mm

15 . (B). (B). 3. (B). (G). 4. G. G = 1 mm.

16 4. (G). 5. (α).

17 (α) 5.. (α). α (D). 6. (D)

18 (a) 3 GHz, E-plane (b) 8 GHz, E-plane

19 (c) 13 GHz, E-plane (d) 18GHz, E-plane

20 (e) 23GHz, E-plane (f) 28GHz : E-plane

21 (g) 33GHz, E-plane (h) 38GHz, E-plane 7. (D).

22 6 7 (D). θ = (P). P 0, 5, 10, 15 mm 5 mm P 17, 22, 27, 32 mm. P = 0 mm P (a) P P -10 db 10 : 1. P = 0 mm. 10 : 1 P. θ = P θ = P. P = 13 mm.

23 (a). (b). 8. (P).

24 (a) 3GHz, E-plane (b) 8GHz, E-plane

25 (c) 13GHz, E-plane (d) 18GHz, E-plane

26 (e) 23GHz, E-plane (f) 28GHz, E-plane

27 (g) 33GHz, E-plane (h) 38GHz, E-plane 9. (P).

28 10. (P) θ= End cap (End cap). 11 A-Type B-Type..

29 (a) A-Type 11.. (b) B-Type 12. End cap

30 (W) λ/4 25 mm. (B) 3 mm. (G) 1 mm. α 57. (D) θ = mm. (P) θ = mm.. 13 z z z = 17 mm. 3D

31 , E-plane, H-plane 2D. 13. z. (a) (3 GHz, 8 GHz ).

32 (b) (13 GHz, 18 GHz ). (c) (23 GHz, 28 GHz ).

33 (d) (33 GHz, 38 GHz ). 14. z. (a) (3 GHz, 8 GHz ).

34 (b) (13 GHz, 18 GHz ). (c) (23 GHz, 28 GHz ).

35 (d) (33 GHz, 38 GHz ). 15. z. (a) 3 GHz

36 (b) 8 GHz (c) 13 GHz

37 (d) 18 GHz (e) 23 GHz

38 (e) 28 GHz (e) 33 GHz

39 (e) 33 GHz 16. 3D. 17..

40 17 (Z in = R in + jx in ) 2-40 GHz. 3 GHz 30 GHz R in X in

41 . 50 SMA

42 1. -. W B G α D P C t 2a 2b r,,

43 (a) 3 GHz

44 (b) 8 GHz (c) 13 GHz

45 (d) 18 GHz E-plane. (a) 3 GHz

46 (b) 8 GHz (c) 13 GHz

47 (d) 18 GHz H-plane

48 23. - θ =

49 db 3 GHz 30 GHz 10 : GHz 16 GHz (a) 3 GHz θ = 90 θ = 110 (c) 13 GHz θ = 90. θ = 90. ( ) 30 GHz -33 dbi θ = 90. θ = 0. 3 GHz

50 ( GHz).

51 26. ( GHz). 27..

52 28. (θ = 90 ) UWB GHz θ,, θ = 90 θ = 60. θ = 90 θ = GHz θ = 60 θ = 90, θ = UWB GHz 8 GHz

53 UWB.

54 . CST Microwave Studio(MWS ) db 3-30 GHz 10 : 1. 3 GHz 0.25λ 0.3λ. 0.25λ 10 : 1.. θ = λ 20 mm. (P).. - (UWB).

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