طراحی و شبیه‌سازی و ساخت آنتن هوشمند مقرون به صرفه با تنوع الگوی تشعشعی بسیار زیاد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی ارشد مخابرات میدان دانشگاه امام حسین

2 پژوهشگردانشگاه جامع امام حسین (ع)

3 عضو هیئت علمی دانشگاه جامع امام حسین (ع)

چکیده

در این مقاله آنتن هوشمند کوچک مقرون به صرفه­ای با گین زیاد و تنوع الگوی تشعشعی بسیار زیاد ارائه می­شود. این آنتن در واقع نمونه پیشرفته­ آنتن ESPAR مرسوم است. این آنتن از یک "مونوپل کوچک" و 12 مونوپل "خم‌شده" تشکیل شده است. مونوپل کوچک در وسط قرار می­گیرد و به‌عنوان المان تحریک‌کننده استفاده می­شود و 12 مونوپل خم‌شده به‌عنوان المان­های پارازیتی استفاده می­شوند. تزویج بین المان تحریک‌کننده و المان­های پارازیتی، بار خازنی برای المان تحریک‌کننده ایجاد می­کند که باعث کوچک­تر شدن آنتن می­شود. با خاموش و روشن کردن 12 "دیود پین" در انتهای المان­های پارازیتی امکان چرخش پرتو به­وجود می­آید. ابعاد آنتن ساخته‌شده در باند S نسبت به آنتن­های هوشمند مرسوم این باند 30 درصد کوچک­تر شده است. ارتفاع آنتن کمتر از mm24 (GHz @4/2  λ186 /0) می­باشد و این آنتن دارای نسبت جلو به عقب dB 4/22 و بیشینه گین dBi 26/8 در فرکانس GHz 4/2 است.

کلیدواژه‌ها


عنوان مقاله [English]

Design, Simulation And Fabrication of A Low-Cost Smart Antenna with High Radiation Pattern Diversity

نویسندگان [English]

  • Ali Nafar 1
  • amir ali habibi daronkola 2
  • Yaqob Qaneh Qarehbagh 3
1 imam Hussein university M.sc. student
2 imam hussain university
3 ihu
چکیده [English]

In this paper a low profile, low-cost smart antenna which has a high gain and high radiation pattern diversity is presented. This antenna is actually an advanced ESPAR antenna which is made up of a “short monopole” and 12 “folded monopoles”. The short monopole is in the center and is used as the driven element and the 12 folded monopoles are used as parasitic elements. The coupling between the driven element and the parasitic elements creates a capacitive load for the driven element, which causes the antenna to become low-profile. By turning on and off 12 "PIN diodes" at the bottom of the parasitic elements, the beam can be rotated. The dimensions of the proposed antenna fabricated in the S band are reduced by 30% compared to the conventional smart antennas of this band. The antenna height is less than 24mm (0.186λ @ 2.4 GHz), the front to back ratio is 22.4dB and antenna's maximum gain at 2.4GHz is 8.26dBi.

کلیدواژه‌ها [English]

  • Smart Antenna
  • ESPAR
  • Monopole
  • PIN Diode
  • High front-to-back ratio
  • High Gain
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