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Explain Advantages and disadvantages of Microwaves compared to VHF.
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Solution:

$$ \begin{array}{|l|l|} \hline{\text { Advantages }} &{\text { Disadvantages }} \\\\ \hline \begin{array}{l} \text { 1. Large bandwidth: The bandwidth } \\ \text { available is proportional to operating } \\ \text { frequency. } \Delta f=Q . f \\ Q=\text { Quality factor } \end{array} & \begin{array}{l} \text { 1. Higher Radiating losses in } \\ \text { transmission lines and connecting } \\ \text { wires } \end{array} \\ \hline \begin{array}{l} \text { 2. The dimensions of the antenna gets } \\ \text { minimized to a great extent for a given } \\ \text { directive gain. } \end{array} & \begin{array}{l} \text { 2. Transit time effects make conventional } \\ \text { devices unusable at microwave } \\ \text { frequencies. } \end{array} \\ \hline \begin{array}{l} \text { 3. Satellite communications was possible } \\ \text { due to usage of microwaves as } \\ \text { antenna size became practicable. } \end{array} & \begin{array}{l} \text { 3. Lumped elements such as Resistors, } \\ \text { Capacitors, and Inductors cannot be } \\ \text { used. } \end{array} \\ \hline \text { 4. Fading effect is less compared to lower } \\ \text { frequencies. } & \begin{array}{l} \text { 4. Inter electrode capacitances, lead } \\ \text { inductors cause severe problems in } \\ \text { circuit design } \end{array} \\ \hline & \begin{array}{l} \text { 5. As the wavelength is smaller, the } \\ \text { attenuation during adverse weather } \\ \text { conditions is higher. } \end{array} \\ \hline \end{array} $$

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