The Cell Phone Invention :: Expository Essays Research Papers

The Cell Phone InventionWe countenance all seen and used electric cell phones. However we have probably taken the engineering for granted. The cellular telephone has evolved and improved a lot over the years. Before we get into the history let us foremost get the definition for cellular. Its called cellular because the system uses many base commits to divide a service area into multiple cells (1). Each base station consists of a tower and at the base is the equipment to send and receive signals. Now that it cleared up we will look back into the history. To find the first cell phone in history we look back to 1928. In 1928 the Detroit Michigan Police Department made the earliest significant use Mobile radio in a vehicle in the United States. The system operated at a frequency close to 2 MHz. The channels soon became overcrowded (3). This seems like a small and weak signal but at the time it was evolutionary. Nothing like this had ever been done before. It also seems like a crude mode but it was just the beginning.The police, different companies, and public agencies were the only ones that got to use the mobile technology, but in 1945 the technology was made for public use. The mobile equipment was not in advance(p) enough to prevent interference (3). The concept of using small cells wasnt looked at until 1947. Research found that this would increase the traffic capacity of mobile phones, however the technology didnt exist at that time (1). Also in 1947 AT&T tried to get the FCC to put aside a large band of radio-spectrum frequencies so that widespread mobile telephone service would become feasible (1). The FCC didnt like the idea and didnt back the technology at the time and limited the amount of frequencies. 21 years later, in 1968, the FCC reconsidered AT&Ts offer. They stated that, if the technology to build a better mobile service works, we will increase the frequency allocation, freeing the airwaves for more than mobile phones (1). This is when AT&T and Bell Labs proposed the first idea of cells. There would be many low frequency towers and calls would be passed from tower to tower as phones traveled across the area. Until this time, we have to realize that cell phone research was not a major or popular area. It was probably seen as a worthless study that wouldnt amount to much if anything.