Architecture and frequency plan for a UHF portable radio

US6219531A · kind A · utility

Assignee

• ERICSSON GMBH · US

Inventors

• Gerald E. Roberts · Monroe, US
• John Russell Lane · Iron River, US
• John Poirier · Gilbertsville, US
• Robert B. Sanders · Pamplin, US
• William P. Overstreet · Roanoke, US
• Johannes J. Vandegraaf · Lynchburg, US
• Jeff Johnson · West Fargo, US
• David C. Bing · Forest, US
• Fulvio Bonecchi · Menlo Park, US

Key dates

• Filing date: Sep 4, 1998
• Grant date: Apr 17, 2001
• Expiry date: Sep 4, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/40
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

An architecture and frequency plan for a wideband UHF radio minimizing spurious output signal emissions uses a low value for the ratio of the maximum RF operating frequency to the (first) intermediate frequency (IF) in the radio, as part of its internal superheterodyne conversion process. A minimum value or a value sufficiently close to the minimum value of this ratio allows the radio design to be optimized to reduce spurious outputs and the effects of inherently present major harmonics. These and other advantages and features permit a radio design to be realized in a cost effective manner for an array of stringent performance specifications including low spurious output emissions.