Guide of RADIO RECEIVER DESIGN
Radio-Electronics.Com :: Radio and electronics tutorials, news and ...
Information and tutorials about all aspects of radio and related electronics
components.
Welcome! Thank you for visiting Radio-Electronics.Com, the resource centre for the radio and electronics design engineer
A host of electronic circuits with electronics circuit design information along with circuit design aspects such as EMC, ESD, PCB design and signal integrity
Essential information for electronic design engineers
Tutorials and overviews about elements of radio receiver design including superhet or superheterodyne principles, PLLs, synthesizers and DSP as well as radio receiver specifications
Dave's Radio Receiver Page - Dave's Radio News - Sponsor N9EWO
Reviews and comments on shortwave radio receivers.
receiver has a quad conversion (?) design, 7 inch TFT LCD/spectrum scope, Dual DSP IC's (one for the receiver and the other for the display), 5 roofing filters, 10 VFO's, 1000 memory channels, internal 60 min (or longer) digital audio recorder, analog TV reception
Dream DRM Receiver
Open source receiver and transmitter for Digital Radio Mondiale (DRM) using analog
AM bands with HE AAC compressed sound at very low bitrates.
A., Fock, G., Meyr, H.: Optimum Receiver Design for Wireless Broad-Band Systems Using OFDM - Part I , IEEE Transactions on Communications, Vol
A., Fock, G., Meyr, H.: Optimum Receiver Design for OFDM-Based Broadband Transmission - Part II: A Case Study , IEEE Transactions on Communications, Vol
Website design by and
Welcome to Audio - Design and manufacture broadcast quality radio ...
Manufacturer of wireless microphone systems. Includes news, technical advice and
listing of distributors.
Welcome to Audio - Design and manufacture broadcast quality radio microphone systems
Audio Ltd design and manufacture broadcast quality radio microphone systems for use in film and television
wireless microphone, radio microphone, uhf systems, frequency agile transmitter, frequency agile receiver, diversity system, body pack transmitter, location sound , Audio design their systems to be flexible
Audio took the approach of taking the frequency agile transmitter same full receiver design with full sensitivity and selectivity, and then duplicating it
info: RADIO RECEIVER DESIGN
Photo by images.sharperimage.com
R1155 receiver
Complete specifications, photos and many interesting details on this British WW
II era receiver.
designation was the R1155 and the corresponding transmitter was the T1154, the first units being installed in June 1940
The electrical design is quite interesting, especially the D/F circuitry
Ekco designed a new knob with the coarse drive at the rear, and a large fine tuning knob at the front
It was given the designation Type 35
This also had the type A8882B and Serial number 404 designation plate on it, which I used as this receiver had no nameplate
ELECTRICAL DESIGN The electrical design is rather interesting
electronics tutorials
Basic electronics tutorials on circuits and components, filters, oscillators and
other applications.
Offering free comprehensive basic electronics tutorials in amplifiers, antennas, ham radio, filters, oscillators, power supply, receivers, test equipment, transmitters, radio design and electronics design
RF CIRCUIT DESIGN - Chris Bowick, WD4C I have never read a better book on RF design
Chris's book is a constant reference for the serious RF designer
My edition of this book has chapters on: Components Wire - resistors - Capacitors - Inductors - Toroids - Toroidal Inductor Design - Practical Winding Hints
Filter Design Background - Modern Filter Design - Normalization and the Low-Pass prototype - Filter Types - Frequency and Impedance Scaling - High Pass Filter Design - The Dual Network - Bandpass Filter Design - Summary of the Bandpass Filter Design Procedure - Band Rejection Filter Design - The Effects of Finite Q
Transistors at Radio Frequencies - RF The Transistor Equivalent Circuit - Y Parameters - S Parameters - Understanding RF Transistor Data Sheets - Summary Small Signal RF Amplifier Design Transistor Biasing - Design Using Y Parameters - Design Using S Parameters RF Power Amplifiers RF Power Transistor Characteristics - Transistor Biasing - Power Amplifier Design - Matching to Coaxial Feedlines - Automatic Shutdown Circuitry - Broadband Transformers - Practical Winding Hints - Summary Appendices on Vector Algebra and Noise Calculations ( Types of Noise - Noise Figure - Receiver Systems Calculations )
Radio Design Group - How It Works: Radios
Explains the science behind the technology.
Whether it's music, data, television, phone calls or whatever, if it's wireless, chances are it's radio! Copyright ©1996-2001, Radio Design Group, Inc
AOR UK Radio Receiver Home Page
Wide band, shortwave, and hand portable receivers and accessories.
The goal has been, and remains the drive for excellence in radio design, AOR has always been at the forefront of radio communications technology
Due to continuous developments, AOR reserves the right to make design and specification changes for product improvement without prior notice
Benefits
Photo by www.hanssummers.com
W&D - Design and manufacture of high quality specialist radio ... Manufacturers of
radio telemetry, broadcast and security products.
Pioneering EE Patents: The Collection Browse a collection of pioneering patents and check out a featured patent twice
each month. Original patents are featured for the transistor, the superhetrodyne
...Check back regularly as original patents are for such fundamental building blocks of EE design as the transistor, the superhetrodyne receiver, and the computer mouse
The third electrode, which may be designated the base electrode, preferably makes a low resistance contact with the body of the block
This fundamental principle of modern receiver design is described in this patent as 'a method of indirect amplification and reception which operates independent[ly] of the frequency of the incoming oscillations...' Wave Translation System Any electrical engineer who has ever designed an amplifier or active filter around an op-amp has made use of the fundamental principle of negative ('degenerative') feedback
This fundamental principle was provided to memory designers by U.S
Automatic Editor The patent for the original word processor begins, like so many forgotten patents for pioneering inventions, with a description that now seems understated: 'This invention relates to means for editing visually displayed stored material.' The patent lists numerous objects of this now-ubiquitous invention, for example: 'to permit one or more operators to visually monitor electronically stored copy and to edit said copy, ' 'to enter new characters in place of old characters, ' and 'erasing old characters in stored blocks of information.' Programmable Digital Signal Processor Many pioneering contributions to EE design gradually become commonplace and buried in 'off-the-shelf' components, to the point where we forget their importance to achieving the end result
Adobe Acrobat .pdf ARCHIVE Page (A thru LN)
A fairly extensive list of RF related application notes.
Note, "Designing Filters Using the Digital Filter Design Toolkit " National Semiconductor Application Note, "Operating and Evaluating Quadrature Modulators for Personal Communications Systems" National Semiconductor Application Note, "Integrated LNA and Mixer Basics" National Semiconductor Application Note, "Demodulating with the LMX2240 IF Receiver" National Semiconductor Application Note, "Quadrature Modulators for PCS" National Semiconductor Application Note, "LNA / Mixer Basics" Stamp Applications No
5 RFMD Application Note, "Operating a Quadrature Modulator as an FSK Modulator" RFMD Technical Article, "Attenuator & Amplifier ICs" RFMD Technical Article, "ICs Simplify Digital Comm Link Design" RFMD Technical Article: "Low Cost Integrated Solution for Analog Cellular RF Blocks" RFMD Technical Article: "The Growth of PCS" RFMD Technical Article, "LNA / Mixer ICs Ease Wireless Receiver Design" RFMD Useful Tables, "Power Conversions" RFMD Useful Tables, "Microstripline Impedances" RFMD Useful Tables, "Mismatch Conversions" RFMD Useful Tables, "Third Order Intercept Points" RFMD Useful Tables, "Cascaded Noise Figures" SIEMENS Application Note, "Simple Microstrip Matching" Solutions Cubed MiniMod Data Sheet Solutions Cubed MiniMod Basic Stamp 1 App
RAND HOME PAGE
Radio Neutrino Detector Array, located 1.5 km from the South Pole. Its aim is to
detect ultra-high energy (>1 TeV) neutrinos interacting in the Antarctica ice ...
R adio A rray N eutrino D etector Photos and Conceptual Designs
Design of attached to the AMANDA cables
He spent most of his time attempting to redesign the antenna/receiver modules from the surface experiment so that they would be suitable for travelling down the bore holes deep into the Antarctic ice and performing radio measurements under those extreme conditions
We then saw that the biconical design had a few limitations
We have a possible design with a 1/4 wave choke (see illustration below), which makes the antenna blind to the center power cable
The design is quite complicated, but seems worth pursuing if the cables must run through the antenna
An antenna must be designed which would not surround the cables in this way
Chris Baker has done a lot of work on the antenna structure, but the receiver design and the surface equipment require further study
RADIO RECEIVER DESIGN ?
Amateur SETI: Project BAMBI
Design, construction, and initial observational results of a 4-GHz amateur radio
telescope with circuit board layouts, software, and schematics.
Up and Running at 4 GHz: The SETI-Capable BAMBI Radio Telescope By Bob Lash and Mike Fremont Abstract The design, construction, and initial observational results of a 4 GHz amateur radio telescope are described in this first report from Project BAMBI (Bob And Mike's Big Investment)
Design An overview of the design is illustrated in figure 1
JWD Ltd - RF, Microwave and Communications Engineering
Offers information on business activities, past projects and experience in the
fields of mocrowave and RF engineering .
The Company's main expertise is in RF design, but PIC and embedded software is required in most projects and such development is carried out in-house
Services offered The design and production of radio frequency equipment
National Radio Company Tour
History and overview of the company and products.
It was designed for the broadcast band, not for short wave reception
Based on this introduction to radio, National made the design, manufacture and sales of radio equipment their principle line of business
This was a cost reduced design based upon National's earlier AGS (Aeronautical Ground System) receiver developed for the CAA (known as the FAA today)
The RF preselector was made an optional accessory, the case design was simplified and only one set of coils was sold with the receiver
With few changes other than to keep up with changing tube technology, this same basic design survived for over 20 years
It was designed with a 6L6 oscillator running on 80 meters followed by push button selectable multiplier stages for output on 40, 20 or 10
The DSP Interchange for Weaksignal and SETI. (W6/PA0ZN)
Information on the use of DSP to track satellites and search for small intensity
radio signals, including possible signals from outer space.
Some of the areas with increased activity and interest are all kinds of low power (QRP) applications, for operating as well as construction, advanced receiver design and the utilization of computing power for the enhancements of the communication process
In addition to this, computers enable better research and design for antennas
(SETI League) More DSP Based receiver Designs and Concepts
Software of Interest to Designers
Military Radio Nomenclature
Comprehensive article by Ray Mote from Electric Radio.
The Army system featured the familiar SCR, SCM, SCS designators for systems, and BC, FT, HS, etc
The Navy used a series of two and three-letter designators for systems, while using a 5-digit type number for each system component
Three-letter designators beginning with 'SC' were used to denote complete systems, while one and two- letter designators were used for components
Only a few system designators were used: SCM Set, Complete, Meteorological SCR Set, Complete, Radio SCS Set, Complete, System The SCS designator was applied to groups of SCR-numbered sets comprising an extensive system, such as multiple radio sets employed in a ground-based fighter direction/control center
The SCR designator could be a single transmitting or receiving set, or a full set of both transmitting and receiving equipment
An additional designator, 'RC' was used for subsystems or groups of accessories
This ranged from the RC-198 (the old familiar FL-8- A audio filter) to IFF systems which were intended to be used with ground or airborne radar sets carrying their own SCR designator
The designators for equipment components were: A Phantom Antennas AL Aerial Communication AN Antenna Aerials AP Panel Sets AR Lightning Arrestors BA Primary Batteries BC Basic Component (Receivers, Transmitters, Control Boxes, etc.) BD Switchboards, Power Boards, etc
Altair's Natural Radio Projects
Exploring the electromagnetic spectrum.
Gamma Ray Bursts - Satellites designed to monitor nuclear tests received unexpected gamma ray bursts (GRBs) not of earthly origin
Yes, thats right, your ears cover most of that range, which makes trivial receiver designs possible
This cheap and easy 50 turn shielded loop design is great for nulling the nasty noise which plagues the bands below 0.5 MHz
This quick and dirty receive loop design was a last minute compact, rugged antenna to be tossed into an overnight bag for an unexpected business trip near the South Pole
The LONGWAVE BBS (706-672-0360) has some design info on my Mk III and my Mk IV receivers
Passive design with DC coupling incurs no error, no increase in noise floor, and no degradation of dynamic range
Designed to run on low-end PC under DOS
Construction of Mk V receiver for ULF research, successor to my Mk IV design, and locate the 1/3 Hz mystery signal
G0UPL Homebrew Radio, Electronics & Computers
Many homebrew projects for Radio, Electronics and Computers including QRP HF
Radio, Z80 Computers.
Restoration Projects: NoobowSystems Lab.
NoobowSystems Lab - four restoration projects on Lafayette receivers, with pictures.
In the reality the radio worked pretty well, and its basic design led the way to the famous S-38 series
Boys knew that the Echophone EC-1A/B was designed and manufactured by Hallicrafters, and of course, they also wanted the name of the Hallicrafters on his radio
Some Japanese manufactures copied its unique design
Looks almost identical except longwave coverage instead of medium wave band, but it has several design changes, mostly component layout change
So called 'Collins Type' double superheterodyne and a mechanical filter, effective and carefully designed circuit
Changing some of the component values from the original design was necessary
Poorly designed dial mechanism prevented smooth tuning
Its unique circuit design uses a 10.7MHz filter as FM IF and shortwave 1st IF bandpass
Transistorized except final power stage, Collins mechanical filter, and unique bilateral circuit design
Now the DC12V inverter power supply is built-in, and the panel design is much sharp than its predecessor
Designed to be a convenient tool for a short-distance hands free communication, this 50MHz FM transceiver has an output power of only 10mW; maximum coverage is approx
Home @CallCenter