Ophir has the following amplifiers: RF Amplifiers, Microwave Amplifiers, High Power Amplifiers, Solid State Amplifiers, Wideband Amplifiers, Cellular Amplifiers, Linear Amplifiers, Wireless Amplifiers, Communication Amplifiers, and Satellite Amplifiers

Article: Minimizing In-Band Harmonics at Higher Frequencies by Thomas Mullineaux, OPHIR RF
Summary: When searching for amplifiers (rf amplifiers, microwave amplifiers, high power amplifiers, or solid state amplifiers), one must think in the long term. By selecting amplifiers that are capable of higher frequencies when compared to current standards, the high intial investment cost would be offset by lowered future costs. However, consideration should be given to the issue of in-band harmonics being a hazard to test houses and manufacturers. A solution is to minimize noise at the source and by using the self-filtering properties of high power RF amplifiers.

OPHIR RF microwave amplifiers and RF amplifiers utilize fully isolated linear MOSFET or advanced GaAs FET devices, which provide high gain, wide dynamic range and excellent third order intercepts. High efficiency and reliable operation are achieved by employing unique RF combining circuits, RF microstrip networks, sophisticated thermal design, custom machined housing and heavy duty components. The high power RF amplifiers undergo extensive burn-in prior to final test and inspection.

These band-specific and narrowband microwave amplifiers and high power RF amplifiers are ideally suited for high power communication systems (like PCS, CDMA, GSM or WCDMA cellular phone base stations), military communication systems, medical and industrial applications.

These microwave amplifiers and RF amplifiers are also small and lightweight, utilizing Class A/AB linear power devices that provide an excellent 3rd order intercept point, high gain, and a wide dynamic range. Due to robust engineering and employment of the most advanced devices and components, these amplifiers achieve high efficiency operation with proven reliability.

OPHIR RF AMPLIFIERS - MODEL OPTIONS

CONNECTORS - Front panel type-N connectors, designated by "F" are standard (rear panel type-N connectors are available as a no cost option if specified at time of order, designated by specifying "R" instead of "F").

IEEE-488 AND RS-232 GPIB INTERFACE - IEEE-488 and RS-232 Interface offers front panel digital display, forward and reverse power readings, gain adjustment, ALC on/off, fault indication, standby mode, and rear panel IEEE-488 HPIB, as an all inclusive package. Order by specifying "FE" or "RE".

ETHERNET CONNECTIVITY INTERFACE - The Ethernet Interface works in conjunction with the RF amplifier's front panel LCD controller to provide the user with a means to remotely view the amplifier's current status, as well as control the amplifier's operation. Already proven in the field over the past year, applications include satellite control, wireless military communications and testing in hazardous areas. Order by specifying "FT" or "RT".

• Browser-based interface allows platform-independent operation – control and status can be achieved from computers running MS Windows, Apple OS, Linux, Unix, etc.
• Support for DHCP to allow seamless integration with existing networks – (IP address can also be manually set using the console serial RS-232 communications port).

The Ethernet Interface option incorporates a special purpose Web page server inside the amplifier, providing detailed information on the amplifier’s status in HTML (Hyper-Text Markup Language), and allowing control of the following:

• RF Output Mode (Amplifier ONLINE or in STANDBY)
• Amplifier Gain (Automatic Level Control [ALC Mode], or as a percentage of the Voltage Variable Attenuator full-scale [VVA Mode]).
• Forward and Reflected Output Power.
• VSWR Alarm Threshold.
• Temperature Fault and VSWR Fault indication.

RS-422 INTERFACE - RS-422 Interface for use with Remote Control Unit.

OPHIR RF TOP Amplifiers