Radio circuit diagrams electronics projects for radio transmitter, radio receiver circuit, rf amplifiers, rf boosters and some other related RF circuits like: fm antenna booster, microwave transmitter and wireless modules.
A very simple low cost and ultra compact VHF UHF Low-Noise amplifiers circuit can be designed using the MAX2664 and MAX2665 ultra-compact LNAs for VHF/UHF applications.
These devices incorporate a broadband LNA with an integrated bypass switch. The MAX2664 covers the UHF frequency range from 470MHz to 860MHz, and the MAX2665 covers the VHF frequency range from 75MHz to 230MHz. Each device has a zero-power bypass mode for improved high-signal-level handling conditions.
As you can see in the presented circuit diagram , this RF project requires very few external components . Both ICs has a high gain around 15dB and require a single power supply , that can provide an output voltage between 2.4 to 3.5 volts .
VHF UHF Low-Noise amplifiers has a very low current consumption of 3.3 mA and can be used in applications like : Smartphones/Handsets , MP3 Players , Home Audio/Video and other portable navigation devices .
This electronic project presented in this circuit diagram is an very simple “economy” shortwave radio receiver circuit . Why this shortwave receiver electronic circuit is an economy type? Because is use few common components as you can see in the schematic diagram . This shortwave radio receiver is based on 2N2222 transistors and has and has an operating frequency range between 6 and 17 Mhz .
An very simple portable am fm portable radio circuit can be designed using the LA1800 IC and some other external components . As you can see in this circuit diagram ,the LA1800 manufactured by Sanyo Semiconductors , require few additional components and is very easy to design .
The LA1800 am fm portable radio circuit needs to be powered from a 3 volt DC power supply circuit , you can use an 3 volt battery .
This radio receiver circuit has a low current dissipation of 5.6mA for FM band and 3.2mA for AM band .
Also the output signal is driven into earphone speakers , but you can use an additional speaker ( in that case you need to connect an additional small power audio amplifier ) .