Why do phones not have antennas anymore?

Since cellular signals are of very short (mm long) wavelength, it was concluded that enough room is inside the phone to not need an external antenna. It offered no increase in range. Additionally since digital cell phones use far less power they did not need to be designed with safety in mind.

Do newer phones have better antennas?

Simply put, newer phones get far better coverage than older models. This is because they have the radio technology to tap into newer, faster “spectrums” rolled out by carriers.

Do newer phones have better reception?

Phone Model Older phones tend to have weaker reception than newer phones. As technology standards for cellular networks improve (3G, 4G, 4G LTE, and 5G), so do cell phones. Technically, newer phones will provide you with the best signal reception – whether they are from Samsung, Apple, Google, or LG.

When did cell phones become widespread?

When did cell phones become popular? Cell phones became popular during the cellular revolution that started in the 90s. In 1990, the number of mobile users was around 11 million, and by 2020, that number had risen to a whopping 2.5 billion.

How do I connect an external antenna to my smartphone?

You can connect most phones to an external antenna by using an installable hands free kit that comes with an external antenna adapter. You can also purchase an external antenna adapter that allows you to connect the antenna directly to your phone. Some phones have an external antenna port.

Why do antennas not work on metal?

The presence of metal is not conducive to effective antenna performance. Conductive surfaces become charged when in contact with electromagnetic fields, becoming radiators. This causes a range of issues for effective antenna performance. In this article we will review four popular techniques for countering these effects.

Are heavy-duty metal enclosures bad for Internet of things antennas?

As more Internet of Things devices hit the market, new design challenges surface. One key conundrum for engineers is the presence of heavy-duty metal enclosures. Metallic enclosures are necessary to provide durability and protective qualities to devices. The presence of metal is not conducive to effective antenna performance.

Why do engineers remove material from an antenna enclosure?

Many engineers opt to remove material from the enclosure to create a gap, slit or window. It is thought that this allows the antenna to radiate without disruption, but this is rarely the case. Engineers underestimate the window size necessary for performance and overlook other critical factors.

Why don’t we use external antennas for MIMO?

As mentioned above, aesthetics are often a reason to not go with external antennas. More importantly, however, the MIMO capabilities of 802.11n/ac take advantage of phase offsets between the antennas. This necessitates that the multiple antennas are at a fixed separation distance from each other so as to be out of phase with each other.