Digital TV Antenna

Digital antenna TV has to have capable reception on TV Band Digital TV frequency , from 470-862 MHz.

We can design with Yagi model, Logarithmic antenna Design , Fractal Antenna design or other design that proven can receive with good quality on this band. with frequency reception, we can design this :

862 - 470 = 392 , 1/2 Lambda will be , 490 + 392/2 = 666 Mhz

For Yagi antenna , I use calculation design from K7MEM.com
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or you can also get design from Su and Chang http://www.jpier.org/PIERL/pierl12/14.09102302.pdf

The implementation looks like this :

I have tried the Su and Chang design , with good reception at Digital Terrestrial TV Channel and average quality in analog TV channel reception.

DIN rail ARM7 Ethernet/USB Subsystem (LPC2138)

This package is ideal for industrial use, facilitating quick connection and relocation
DIN rail mountable and compatible with OKW Railtec C-5 enclosure
On-board BASIC compiler runs 30 times faster than interpreted BASIC

SUCCESS

Astronomy

A NASA astronomer selected ARM Ethernet controllers to create a one-off error-correction system for an infrared telescope.

Our secondary mirror assembly would occasionally jerk. So we constructed a system using eight BMA180 accelerometers, each attached to an ARMWeb SBC.
These were then programmed to acquire and stream the accelero- meter data to a Linux server. The server would save and graph the data in real time. When an 'image jump' was recorded, this accelero-
meter data was analyzed to help identify the faulty mechanism.

—Anthony D.
University of Hawaii

APPLICATIONS

Ethernet
Wireless
Sensors
Monitoring

TECHNICAL SPECIFICATIONS

System

DIN rail enclosed 60 MHz 32 bit ARM7 CPU (LPC2138)
Programmable in a compiled BASIC, C, HTML and XML
On-board BASIC compiler runs 30 times faster than interpreted BASIC
1 million I/O operations per second

Size

88.5mm x 84mm (3.4” x 3.3”)
Compatible with DIN rail OKW Railtec C-5 enclosure

Storage

512k flash with 64k user code space
224k available for user web pages
224k user file space
32k RAM

Power

Less than 1W
5-40V DC input
Output power 3.3V regulated, 250 mA available to user

Connectors

25 pins programmable for I/O
8 x 10 bit analog A/Ds, 1 10bit DAC
Optional USB connection

DOCUMENTATION

ARM7 Ethernet/USB Microcontroller User
Guide

FREE SOFTWARE TOOLS

ARM7 Ethernet Microcontroller 60 MHz (LPC2138)

Provides 10MB Ethernet connectivity
Simplifies integration with Web page and controller hardware

SUCCESS

Astronomy

A NASA astronomer selected ARM Ethernet controllers to create a one-off error-correction system for an infrared telescope.

—Anthony D.
University of Hawaii

APPLICATIONS

Ethernet
Wireless
Sensors
Logging
Monitoring