ALMA North American Integration Center Front-End Test System

ALMA Memo No. 324 Proposal for ALMA Front End Optics

ALMA Memo 544 Quasi-Optical Verification of the Band 9 ALMA Front-End

The front-end optical design for band 9 (600 to 720GHz) of the Atacama Large Millimeter Array (ALMA) is now completed and verified. A frequency independent design approach is used to couple radiation to the two orthogonal polarized mixed detectors from the large 12m ALMA Cassegrain telescope. As it is a heterodyne receiver, two local oscillator beam paths are integrated into the front-end optic...

Alma Front Ends

Characteristics and Performance of the North American ALMA Prototype Antenna

The submillimeter antennas of the Atacama Large Millimeter Array (ALMA) have specifications that are beyond the current state of the art in accurate reflector antenna technology. Considering that as many as 64 of these antennas would eventually be needed, the ALMA partners AUI/NRAO and ESO each agreed to acquire a prototype antenna, and subject these to an extensive evaluation program. In this ...

2.1 Mobile RF Front End Integration

The mobile phone has become a big part of our daily lives, which has created an exponential growth in network data and an ever-increasing complex RF Front End to support this growth. This in turn has demanded more complex requirements for the filters, switches and power amplifiers (PA) in the front end. In order to address this increase in complexity, there has been a migration from discrete so...