|
| US4236125 | 9 juil. 1979 | 25 nov. 1980 | Societe Lignes Telegraphiques et Telephoniques | Wide band high power very high or ultra high frequency circulators |
| US4258339 | 1 mars 1979 | 24 mars 1981 | Societe Lignes Telegraphiques et Telephoniques | Lumped circuit circulator with adjustable band widening circuit |
| US4276522 | 17 déc. 1979 | 30 juin 1981 | General Dynamics | Circulator in a stripline microwave transmission line circuit |
| US5153537 | 7 mars 1991 | 6 oct. 1992 | Tekelec Airtronic | Electric power transmission system for hyperfrequencies having a gyromagnetic effect |
| US5768690 | 10 oct. 1995 | 16 juin 1998 | Kabushiki Kaisha Toshiba | Radio communication device with improved antenna duplexing apparatus |
| US5774024 | 25 sept. 1996 | 30 juin 1998 | Murata Manufacturing Co, Ltd. | Microwave non-reciprocal circuit element |
| US5786736 | 13 sept. 1996 | 28 juil. 1998 | Murata Manufacturing Co., Ltd. | Non-reciprocal circuit element |
| US5898346 | 26 nov. 1996 | 27 avr. 1999 | Tokin Corporation NEC Corporation | Dual-band nonreversible circuit device comprising two nonreversible circuit elements contained in a single housing to be operable in different frequency bands |
| US6549086 | 22 janv. 2002 | 15 avr. 2003 | Murata Manufacturing Co., Ltd. | Nonreciprocal circuit device with a balanced port and communication device incorporating the same |
| US6583680 | 13 oct. 1999 | 24 juin 2003 | Murata Manufacturing Co., Ltd. | Nonreciprocal circuit device and communications device |
| US6603369 | 2 mars 2001 | 5 août 2003 | Murata Manufacturing Co, Ltd. | Nonreciprocal circuit device and communications apparatus incorporating the same |
| US6646517 | 22 janv. 2002 | 11 nov. 2003 | Murata Manufacturing Co., Ltd. | Nonreciprocal circuit device and communication device having only two ports |
| US7002426 | 6 mars 2003 | 21 févr. 2006 | M/A-COM, Inc. | Above resonance isolator/circulator and method of manufacture thereof |