# Agilent ADS 2009 Update 1: The Latest Version of the Best RF Design Software
If you are an RF engineer or designer, you probably know that **Agilent ADS** is one of the most popular and powerful software tools for RF design and simulation. ADS stands for **Advanced Design System**, and it is a comprehensive electronic design automation software for RF, microwave, and high-speed digital applications.
ADS offers a complete set of features and capabilities, such as:
- Circuit, system, and electromagnetic simulation
- Layout generation and verification
- Design kits and models for various technologies and applications
- Optimization and tuning tools
- Data analysis and visualization
- Integration with other software and hardware products
But did you know that there is a new version of ADS available for free download? It is called **Agilent ADS 2009 Update 1**, and it is the latest and most improved version of ADS. It was released in October 2009, and it offers many new features and enhancements that make it even better than before.
## What's New in Agilent ADS 2009 Update 1?
Agilent ADS 2009 Update 1 is not just a minor update. It is a major upgrade that adds significant value to the existing ADS 2009 software. Some of the new features and enhancements include:
- Improved stability and performance: ADS 2009 Update 1 has been tested and verified to work smoothly and reliably on various platforms, including Windows 7 and Linux. It also has faster simulation speed and memory usage optimization.
- New design kits and models: ADS 2009 Update 1 includes new design kits and models for various technologies and applications, such as WiMAX, LTE, WLAN, radar, satellite communications, RFIC, MMIC, PCB, SiGe BiCMOS, GaAs HBT, GaN HEMT, etc.
- Enhanced layout and verification tools: ADS 2009 Update 1 has improved layout generation and verification tools that support complex designs and technologies. It also has new features such as differential pair routing, via stitching, DRC/LVS checking, etc.
## How to Download Agilent ADS 2009 Update 1 for Free?
If you are interested in trying out Agilent ADS 2009 Update 1, you will be glad to know that you can download it for free from the **Keysight Knowledge Center**. This is the official website of Keysight Technologies, which is the company that owns Agilent EDA. You can find the download link here:
The file size is about **1.48 GB** for Windows, **1.84 GB** for Linux, and **1.70 GB** for Solaris. So make sure you have enough space on your computer and a stable internet connection. The download time will vary depending on your network speed, but it can take over an hour on a high-speed network.
## How to Install Agilent ADS 2009 Update 1?
Once you have downloaded the file, you need to extract it to a folder on your computer. You can use any software that can handle ZIP or TAR files, such as WinZip or 7-Zip. After extracting the file, you will see a folder named **ads2009U1r500_windows**, **ads2009U1r500_linux_x86**, or **ads2009U1r504_sun_sparc**, depending on your operating system.
Inside this folder, you will find a file named **setup.exe** (for Windows) or **setup.sh** (for Linux or Solaris). This is the installer for ADS 2009 Update 1. Double-click on this file to start the installation process.
The installation wizard will guide you through the steps to install ADS 2009 Update 1 on your computer. You will need to accept the license agreement, choose the installation directory, select the components you want to install, and enter your license information.
The license information is very important, because without it, you will not be able to use ADS 2009 Update 1. You will need to enter a valid license code that matches your hardware ID. This code can be obtained from **Keysight EDA Licensing Software**, which is a separate software that manages licenses for Keysight EDA products.
You can download this software from the same website where you downloaded ADS 2009 Update 1. You will need to register for a free trial account and request a license code for ADS 2009 Update 1. You will receive an email with your license code and instructions on how to apply it.
Once you have entered your license code, you can complete the installation wizard and restart your computer if prompted.
## How to Use Agilent ADS 2009 Update 1?
Congratulations! You have successfully installed Agilent ADS 2009 Update 1 on your computer. You can now launch it from the Start menu or the desktop shortcut and start designing and simulating RF circuits.
You can also access the documentation and tutorials from the Help menu or from the Keysight Knowledge Center. There you will find useful information on how to use ADS 2009 Update 1 and its features.