David Attenborough takes a breathtaking journey through the vast and diverse continent of Africa as it has never been seen before. (Part 5: Sahara) Northern Africa is home to the greatest desert on Earth, the Sahara. On the fringes, huge zebras battle over dwindling resources and naked mole rats avoid the heat by living a bizarre underground existence. Within the desert, where the sand dunes 'sing', camels seek out water with the help of their herders and tiny swallows navigate across thousands of square miles to find a solitary oasis. This is a story of an apocalypse and how, when nature is overrun, some are forced to flee, some endure, but a few seize the opportunity to establish a new order.
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ETH: 0x5CCAAA1afc5c5D814129d99277dDb5A979672116 It takes an oscillating electrical current from a
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It takes an oscillating electrical current from a transmitter and turns it into an electromagnetic (EM) wave that radiates outward.
The physical shape and size of an antenna—whether it's a simple monopole (like on a car), a parabolic dish (satellite TV), or a microstrip patch (inside your phone)—determine its gain (strength) and radiation pattern (direction). 2. Propagation: The Journey
It catches passing EM waves and converts them back into electrical signals for a receiver to process.
It takes an oscillating electrical current from a transmitter and turns it into an electromagnetic (EM) wave that radiates outward.
The physical shape and size of an antenna—whether it's a simple monopole (like on a car), a parabolic dish (satellite TV), or a microstrip patch (inside your phone)—determine its gain (strength) and radiation pattern (direction). 2. Propagation: The Journey
It catches passing EM waves and converts them back into electrical signals for a receiver to process.