chuong 5 cac loai anten 3
TRANSCRIPT
![Page 1: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/1.jpg)
CHÖÔNG 5 MỘT SỐ LOAÏI ANTEN
1. Dipole daûi roäng2. Anten Yagi3. Anten Helic5. Anten parabol6. Anten vi dải
![Page 2: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/2.jpg)
1. Dipole daûi roäng
Baêng thoâng cuûa anten– Pattern bandwidth– Impedance bandwidth
![Page 3: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/3.jpg)
Dipole daûi roängDipole coù ñöôøng kính lôùnDipole daïng noùn keùpDipole beû voøng
![Page 4: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/4.jpg)
Dipole daûi roäng
![Page 5: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/5.jpg)
Dipole coù ñöôøng kính lôùn
![Page 6: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/6.jpg)
![Page 7: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/7.jpg)
![Page 8: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/8.jpg)
![Page 9: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/9.jpg)
2l λ<
![Page 10: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/10.jpg)
2l λ=
![Page 11: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/11.jpg)
2l λ>
![Page 12: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/12.jpg)
Dipole daïng noùn keùp
![Page 13: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/13.jpg)
![Page 14: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/14.jpg)
Trôû khaùng vaøo cuûa dipole noùn keùp coùchieàu daøi höõu haïn
![Page 15: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/15.jpg)
Moät soá daïng dipole noùn keùp caûi bieân
![Page 16: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/16.jpg)
Dipole beû voøng
![Page 17: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/17.jpg)
Trôû khaùng vaøo cuûa dipole beû voøng
Trường hợp:2
l λ=
tZ →∞
0tI⇒ =
Mode ñöôøng truyeàn soùng:
Mode anten:
/ 2a
dipole
VIZ
=
I toång:
/ 202 2.a
in tdipole
I VI IZ
= + = +
4.in dipolein
VZ ZI
⇒ = =
Trường hợp tổng quát:
![Page 18: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/18.jpg)
Dipole ñöôïc noái vôùi nguoàn coù trôû khaùng
75SZ = Ω
Dipole beûvoøng ñöôïc noái vôùi nguoàn coù trôû khaùng
300SZ = Ω
![Page 19: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/19.jpg)
Moät soá daïng Monopole
![Page 20: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/20.jpg)
2. Anten Yagi
![Page 21: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/21.jpg)
Thoâng thöôøng phaàn töû chuû ñoäng coäâng höôûng töông öùng vôùi chieàu daøi Coù daïng dipole thöôøng hoaëc dipole beû voøng.
0,45 0,49λ÷
Trong khi ñoù caùc phaàn töû höôùng xaïcoù chieàu daøi khoaûng vaø chuùng khoâng nhaát thieát phaûi coù chieàu daøi baèng nhau.
0,4 0,45λ÷
Khoaûng caùch giöõa caùc phaàn töû höôùng xaï khoaûng vaø chuùng cuõng khoâng nhaát thieát phaûi caùch ñeàu nhau.
0,3 0,4λ÷
Chieàu daøi phaàn töû phaûn xaï lôùn hôn phaàn töû chuû ñoäng vaø noù caùch phaàn töû chuû ñoäng khoaûng 0,25λ
![Page 22: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/22.jpg)
![Page 23: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/23.jpg)
Xeùt moät anten Yagi:
![Page 24: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/24.jpg)
![Page 25: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/25.jpg)
![Page 26: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/26.jpg)
![Page 27: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/27.jpg)
Kết quả moâ phỏng moät anten Yagi:
![Page 28: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/28.jpg)
![Page 29: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/29.jpg)
![Page 30: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/30.jpg)
Anten Yagi vôùi caùc chaán töû voøng
![Page 31: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/31.jpg)
3. Anten Helic
![Page 32: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/32.jpg)
![Page 33: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/33.jpg)
![Page 34: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/34.jpg)
4. Anten Parabol
![Page 35: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/35.jpg)
Minh họa một số mặt parabol
![Page 36: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/36.jpg)
Mặt phản xạ
![Page 37: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/37.jpg)
Hệ số ñònh höôùng :
Vôùi G laø haøm ñònh höôùng cuûa boä kích thích theo goùc 'θ
![Page 38: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/38.jpg)
Anten parabol với mặt phản xạ phụ
![Page 39: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/39.jpg)
![Page 40: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/40.jpg)
5. Anten Vi dải
![Page 41: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/41.jpg)
Hình dạng anten vi dải
![Page 42: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/42.jpg)
Kích thích anten vi dải
![Page 43: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/43.jpg)
![Page 44: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/44.jpg)
Phân tích anten vi dải:
Mô hình đường truyền sóng
Mô hình hộp cộng hưởng
![Page 45: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/45.jpg)
Mô hình đường truyền sóng
![Page 46: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/46.jpg)
![Page 47: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/47.jpg)
Mô hình hộp cộng hưởng
![Page 48: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/48.jpg)
![Page 49: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/49.jpg)
![Page 50: Chuong 5 Cac Loai Anten 3](https://reader031.vdocuments.site/reader031/viewer/2022020217/55123aad4a7959f1028b4896/html5/thumbnails/50.jpg)
Anten vi dải với phân cực tròn