منطقة فرينل و النسبة المقبولة للعوائق : للحفاظ على كفاءة الاتصال، يجب أن تكون منطقة فرينل خالية. النسبة المقبولة لأي عائق ضمن منطقة Fresnel Zone هي 40% أو أقل. تجاوز هذه النسبة يؤدي إلى تأثير سلبي على خط الرؤية المباشر (LoS) وفقدان كبير في البيانات.
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