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What are Radio Frequency bands and its uses?

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rf-spectrum

What is Radio Frequency?

RF is the lowest portion in the electromagnetic spectrum familiar as a medium of analogue and modern digital wireless communication system. It spreads in the range between 3 KHz and 300 GHz. All known transmission systems works in the RF spectrum range including analogue radio, aircraft navigation, marine radio, amateur radio, TV broadcasting, mobile networks and satellite systems. Let’s take a look on each of the RF sub bands and the areas of RF spectrum uses.

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RF Attenuators – How to choose a proper one?

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rf-attenuator
RF attenuators are one of the most significant components in any RF and microwave systems. What are RF attenuators and what is the purpose of it? Here I would like to share about the basic construction, types, use and what are the important factors to choose a proper attenuator for your next RF application.

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How 5G technology works

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      5G is one of the most discussed technologies in this decade, what is 5G and how 5G technology works?
 
5g-future-rfpage
   
 
       5G is the fifth generation telecommunication and wireless network standard which will be capable of handling greater data rates and network efficiency.  5G networks will offer scalable and adaptable services, it promises a smarter, faster and efficient network. This new system expected to be launched in early 2020s.
 

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What is Impedance matching

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thinking_smithImpedance matching 
In electrical engineering, impedance is the ratio of voltage to current with the consideration of phase angle.  According to Ohm’s law V= IR, where V – voltage, I is the current and R is the resistance of the network.  In RF, the idea of impedance matching is to equalizing the source and load impedance for maximum power transfer. Impedance is represented as Z and is complex than just the resistance of the network. In simple explanation, impedance matching is to making source and load impedance as similar as possible in order to minimize losses.

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ACLR measurement in LTE

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Our modern digital communication system has been continuously evolving and it demands higher data rate and system efficiency to support millions of individuals around the clock. Since the complexity of the system increases the challenges also increases in designing, testing and implementation of transmission network and user equipment.
Adjacent Channel Leakage Ratio in any RF communication devices are generally described as the unwanted frequency generated by second or third order intermodulation distortion of the devices which fall near to the transmitting frequency band. In modern digital communication, any power leakage from transmitting channel to the adjacent channel cause distortion in other neighboring channel’s transmission and which affects the system efficiency. In order to make sure the system works perfectly within the allowed limits, an ACLR measurement has to be performed with a reference transmit signal.