Small RF transmitters and receivers are in cell phones, televisions and telecommunications. This guide focuses mostly on microwave and wireless RF receiver and transmitters. Microwave is an electronics’ specialty that is not difficult to learn. However, most microwave RF specialists have higher degrees in engineering. The foundation of the science is engineering and/or physics. Basics of the field include knowledge about radio communication, antennas, satellites, wireless communication and bandwidth.

RF receivers separate out individual radio signals and convert some signals into video, audio or data formats. These receivers use antennas to receive and transmit radio signals, and tuners to separate radio signals from other radio signals. An RF transmitter, on the other hand, is a modulator, oscillator and electronic circuit that produces RF signals. These transmitters broadcast radio signals. They use oscillators to create sine waves, continuous varying electric current, for video and audio signals. Consider the following to learn RF transmitters/receivers basics for more information:

1. Look at explanations for RF receivers/transmitters.

2. Read more on the basic technology of radio frequency (RF).

3. Learn specifics about wireless and microwave RF technology.

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Read about the basics of RF receivers and RF transmitters

These are key components in wireless and microwave electronics like cell phones, computers and small devices that depend on towers or satellites for communication.

I recommend: Go to Global.com and learn about FR Receivers. Watch a high-tech informative video about microwave transmitters at HowStuffWorks.

Learn the basics of overall electronics RF transmission

In order to understand RF receivers and transistors better, you and your business need a foundational understand of RF electronics.

I recommend: Read the feature article by EE-Evaluation Engineering for an overview of RF testing instruments. The beginner's article on RF electronics is good solid background information. The Edge offers a mini-course on RF basics.

Find out more about wireless and microwave electronics for RF transmitters/receivers

Microwaves and wireless is a hopping business area for RF electronics because it deals with all the small gadgets that are so popular today.

I recommend: Take an online microwave-engineering course at Microwaves101.com. Learn key terms and basic technology for module RF transmitter. A popular book at Informit, called “Radio Frequency Microwave Electronics” by Matthew Radmanesh, will give you a solid understanding and foundation for RF technology. This book has a comprehensive glossary and it thoroughly covers the RF electronics’ field with chapters on narrow-bank, small-signal, low noise, multistage transistor and broadband transistor amplifiers.

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• •  If you go to school or send someone to school in your business, it is nice to know that they can learn microwave and wireless RF receivers and transmitters' technology in short order. However, most businesses expect microwave RF professionals to have an engineering or physics degree. So, it actually will take a little longer unless someone has the degree.

Radio Frequency (RF) transmitters/receivers are electronic devices that can be used to control or automate nearly any product that receives/transmits video, voice or data information. For example, retailers use RF transmitters as alternatives to barcodes in inventory management systems. RF receivers are also used in radios, security systems, cell phones, keyless entry gates and doors and many other eletronic products.

A basic understanding of the various modulation processes is necessary before choosing RF transmitters and receivers. Common modulation methods include amplitude modulation (AM), frequency modulation (FM) and phase modulation (PM). AM applies a varied voltage to the carrier. Alternatively, FM involves varying the frequency of the waveform. PM consists of delaying the natural flow of the alternating current waveform. Follow these steps to choose RF transmitters for your product:

1. Compare various types of RF transmitters and receivers and choose those that best fit your business needs.

2. Evaluate specialized services offered by RF transmitter design firms.

3. Shop online for various RF transmitter suppliers and find bargains on the devices you need.

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Compare RF transmitters/receivers

Some RF receivers have visual or audible alarms or LED lights that indicate operation and signal reception. Other RF transmitter applications may require the use of additional products such as antennas, coaxial cables, connectors or ports. For outdoor use RF transmitters, you will need a strong, waterproof design. Wireless RF receivers and transmitters are useful in receiving data from remote locations without the need for wiring. Small RF transmitters and receivers work well for compact, portable devices.

I recommend: SECO-LARM manufactures a wide range of wireless RF transmitters and receivers and offers online descriptions of each product for easy comparison. Information Unlimited offers a range of FM RF transmitters/receivers.

Evaluate RF transmitter design firm services

Choosing a RF transmitter design firm to consult on prototyping, testing and circuit debugging can be a wise decision if you are short on time and are not an engineer skilled in RF design.

I recommend: Sanders RF Consulting offers an experienced staff of RF engineers who offer low-cost consultation services for every phase of your project including inception, prototype and final production phase. RadioLabs specializes in RF design and offers cost-effective solutions for analog projects.

Find RF transmitter suppliers

Once you have determined which RF electronic receivers you need, search online for the most affordable RF components. You can also purchase a module RF transmitter which is a pre-packaged set of components available for low-cost, easy project production.

I recommend: Linx Technologies offers a variety of module RF transmitters that are easy-to-use for engineers of all skill levels. NoKey.com sells a variety of RF transmitter and receiver sets.

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• •  There are also various other complementary devices that you may find useful such as RF modules and RF transceivers. RF modules are incomplete circuits that can be used in larger designs. RF transceivers are used in various audio, data and video components.

With so many RF transmitter applications possible today, any company that uses/works with RF receivers and/or transmitters can fortunately find lots of opportunities for general and specific education and training programs. Such programs will keep professionals fully qualified and prepared to handle the latest technologies in large or small RF transmitters and receivers.

From garage doors to radio/television broadcast stations to Bluetooth devices, RF engineers and technicians need training, certification and formal education to ensure they meet established standards of professional competence, continue their professional development and provide the best service possible when dealing with RF transmitters and receivers. There are three types of education and training beneficial to RF technicians and engineers:

1. Training and certification programs for RF technicians or engineers with RF electronic receivers and transmitters.

2. Degree programs that help RF technicians and engineers expand their knowledge of and ability to work with various RF transmitter applications or receiver applications.

3. Safety training for those who work around high-powered RF transmission systems.

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Enhance your resume with RF transmitters/receivers education certification

Different certificate programs will benefit both engineers and technicians who work on RF receivers and transmitters.

I recommend: Sign up for the Wireless Design Certificate program from Besser Associates, a leader in RF and wireless training. Certification will require roughly 100 classroom hours consisting of instruction and four exams. Consider the Certified Wireless Network Administrator training program from Logical Security. The online course focuses on RF technologies in a vendor-neutral environment while training students to plan, select and implement appropriate wireless hardware. Look for training offered by manufacturers of a specific module RF transmitter. Nautel, a leading manufacturer of high-power RF products for AM and FM broadcast and other applications, provides broadcast training programs certified by the Society of Broadcast Engineers to those working at an RF transmission site. The company offers classes on RF transmitter design, installation, operation, troubleshooting and repair at its training center but can also bring classes to your place of business.

Create new opportunities for working with RF transmitters/receivers with a college degree

A bachelor's or master's degree will increase your value as an RF engineer or technician and enable you to rise to a new level in your profession.

I recommend: Go after a Bachelor of Science in Electronics Technology through the University of North Carolina Online program. Earn a Master of Science in Electrical Engineering from DeVry University. Students can complete the degree online or attend classes at a nearby DeVry location.

Get safety certification if you operate high-powered RF transmission systems

If your company operates a communications site or some other business with high-powered RF transmission systems, make sure everyone who needs it accomplishes RF safety training.

I recommend: Register for the RF Site Safety Training, RF Certification Course through Tessco, a leader in the wireless communications industry. Instructors conduct the course in a classroom setting or at your location. Students completing the course receive a completion certificate and card complying with OSHA reporting requirements in 29 CFR1910.268. Take the online RF Site Safety Awareness training program offered at RSI, a company specializing in telecommunications safety and technical solutions. When used under supervision of a qualified person, RSI states the course can conform to FCC and OSHA requirements for RF Safety Training. Upon completion of the course, students receive a printable wallet-sized certification card.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  When looking for certificate programs that will improve your ability, or that of your employees, to work on RF transmitters and receivers, get more for your money by searching for programs that offer college credits you can apply towards an engineering degree.

RF stands for radio frequency and is a standard way of transmitting information wirelessly. Newer technology uses radio frequency identification (RFID) to label, track and identify many items in a supply chain.

RFID systems use tags and readers to send data back and forth, giving a computer information with which to track inventory. Tags can be as simple as a chip that contains information. Some more complicated tags may allow you to update information and change it as the tags pass through the various parts of a supply chain.

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Radio frequency identification (RFID)

RFID is any number of systems that transmit and receive information wirelessly between a reader and tags. Many RFID systems involve small tags that you can affix to items for tracking and identification purposes.

I recommend: At AIM Global, you can read an explanation of RFID and watch a short video explaining it.

Tags or transponders

RFID tags, also called transponders, are small devices with a simple antenna and the ability to store data. An RFID reader can read the transmitted data. Passive tags are less expensive and have a short distance range, while active tags have their own power source and can transmit over a wider range.

I recommend: DataSplice offers a description of RFID tags and information for how they work.

RFID reader or transceiver

An RFID reader, also called a transceiver, actually transmits and receives information. The reader sends signals to the tags, which then send back data to the reader.

I recommend: To check out a brief definition of an RFID reader, visit MoreRFID.com, a division of KST International.

Antenna

An antenna helps make the radio frequency signal travel far enough for the system to read it. Tags have small antennas built in, so they can receive and send data. Readers often have a larger antenna built in, as well.

I recommend: ZIH offers a definition of antenna as it applies to RFID technology.

Addressability

Addressability means the reader can write or change data in the tags, or transponders. This type is more expensive but has more features that are useful for many applications.

I recommend: To read the definition of addressability, along with an extensive glossary of RFID terms, go to RFID Journal.

VHF, UHF

Very high frequency (VHF) and ultra high frequency (UHF) are two types of frequencies used to transmit signals. Higher frequency has longer range than lower frequency.

I recommend: Check out SPI for an explanation of VHF and UHF.