公开(公告)号：AT463912T

公开(公告)日：2010-04-15

申请号：AT07291354

申请日：2007-11-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PIVIT FLORIAN ,  HESSELBARTH JAN ,  FISCHER GEORG ,  CHALERMWISUTKUL SURAMATE

IPC: H04L25/03 ,  H04L27/00

Abstract: The invention concerns a radio frequency transmitter (RFT) and a method of amplifying a radio frequency input signal (S IN ) in the radio frequency transmitter (RFT). The radio frequency transmitter (RFT) comprises a digital signal generator (DSG) with a generation unit (GU) adapted to generate a pulsed bit stream signal and a switch mode power amplifier (SMPA) with a transistor circuit (PT) adapted to amplify the radio frequency input signal (S IN ). The digital signal generator (DSG) further comprises a control unit (CU) adapted to detect in said pulsed bit stream signal a sequence of a constant signal height longer than a predefined threshold. The control unit (CU) is also adapted to initiate, upon detection of said sequence, a generation of a modified pulsed bit stream signal by an insertion of one or more notches in said sequence. Said notches interrupt said sequence by a signal of a signal height different from the signal height of the sequence. The radio frequency transmitter (RFT) further comprises connecting means (CM) adapted to provide said transistor circuit (PT) with said modified pulsed bit stream signal as the radio frequency input signal (S IN ).

公开(公告)号：DE602007005814D1

公开(公告)日：2010-05-20

申请号：DE602007005814

申请日：2007-11-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PIVIT FLORIAN ,  HESSELBARTH JAN ,  FISCHER GEORG ,  CHALERMWISUTKUL SURAMATE

IPC: H04L25/03 ,  H04L27/00

Abstract: The invention concerns a radio frequency transmitter (RFT) and a method of amplifying a radio frequency input signal (S IN ) in the radio frequency transmitter (RFT). The radio frequency transmitter (RFT) comprises a digital signal generator (DSG) with a generation unit (GU) adapted to generate a pulsed bit stream signal and a switch mode power amplifier (SMPA) with a transistor circuit (PT) adapted to amplify the radio frequency input signal (S IN ). The digital signal generator (DSG) further comprises a control unit (CU) adapted to detect in said pulsed bit stream signal a sequence of a constant signal height longer than a predefined threshold. The control unit (CU) is also adapted to initiate, upon detection of said sequence, a generation of a modified pulsed bit stream signal by an insertion of one or more notches in said sequence. Said notches interrupt said sequence by a signal of a signal height different from the signal height of the sequence. The radio frequency transmitter (RFT) further comprises connecting means (CM) adapted to provide said transistor circuit (PT) with said modified pulsed bit stream signal as the radio frequency input signal (S IN ).

公开(公告)号：WO2008036180A3

公开(公告)日：2008-05-08

申请号：PCT/US2007019729

申请日：2007-09-10

Applicant: LUCENT TECHNOLOGIES INC ,  HESSELBARTH JAN

Inventor： HESSELBARTH JAN

IPC: H01P7/04 ,  H01P11/00

CPC classification number: H01P7/04 ,  H01P11/007 ,  H01P11/008 ,  Y10T29/49128 ,  Y10T29/49155

Abstract: A re-entrant resonant cavity (12) includes a first metallized molded plastic component (18), which comprises a re-entrant stub (17), an end wall (14) and a cylindrical side wall (13). The component (18) is surface mount soldered to a metallized PCB substrate (19). A rostrum (24) is located facing the end face (21) of the stub (17) to define a capacitive gap (22) with it. The end face (21) of the stub (17) and the rostrum (24) are configured such that relative rotation between them changes the profile of the gap (22) and hence the gap capacitance. By suitably locating the two parts during manufacture, a particular capacitance may be chosen to give a desired resonance frequency from a selection available depending on the relative angular position of the stub (17) and rostrum (24). In another cavity, the rostrum is replaced by an etched metallization layer of a printed circuit board.

Abstract translation: 入口谐振腔（12）包括第一金属化模制塑料部件（18），其包括入口短截线（17），端壁（14）和圆柱形侧壁（13）。 部件（18）被表面安装焊接到金属化PCB基板（19）上。 讲台（24）面向着短截线（17）的端面（21）定位，以便与其形成电容间隙（22）。 短截线（17）和主台（24）的端面（21）被构造成使得它们之间的相对旋转改变间隙（22）的轮廓并因此改变间隙电容。 通过在制造期间适当地定位两个部件，可以选择特定的电容，以根据短截线（17）和主讲台（24）的相对角度位置，从可用选项中提供期望的共振频率。 在另一个空腔中，通过印刷电路板的蚀刻金属化层代替该主席台。