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    • 1. 发明申请
    • STEERABLE ANTENNA AND RECEIVER INTERFACE FOR TERRESTRIAL BROADCAST
    • 可靠的天线和接收界面的地面广播
    • US20100045528A1
    • 2010-02-25
    • US12612483
    • 2009-11-04
    • John G. N. HendersonCarl Scarpa
    • John G. N. HendersonCarl Scarpa
    • H01Q3/00
    • H01Q1/007H01Q1/24H01Q3/2611H01Q7/005
    • Antennas with steerable antenna patterns and techniques for using such antennas are described. In accordance with the invention, antenna patterns with one or more NULLs are used. Through the use of digital control signals the antenna pattern is steered so that a source of signal interference, e.g., a multipath signal, will be located in a NULL. In this manner the received signal's S/N ratio can be maximized thereby facilitating demodulation. The techniques of the invention can be applied to television, computer devices, mobile devices and a wide range of other systems. Digital commands to control an antenna may include multiple information fields, e.g., a direction field, a channel field, a gain field and a polarity field. Antennas incapable of supporting the specified fields disregard information in fields which are not supported. Information in each supported field is decoded and used to adjust the corresponding antenna characteristic.
    • 描述了具有可导向天线方向图和使用这种天线的技术的天线。 根据本发明,使用具有一个或多个NULL的天线方向图。 通过使用数字控制信号,导航天线方向图,使得诸如多路径信号的信号干扰源将位于空值中。 以这种方式,可以使接收信号的S / N比最大化,从而便于解调。 本发明的技术可以应用于电视,计算机设备,移动设备以及各种其他系统。 用于控制天线的数字命令可以包括多个信息字段,例如方向字段,信道字段,增益字段和极性字段。 无法支持指定字段的天线无视不支持的字段中的信息。 每个支持的字段中的信息被解码并用于调整相应的天线特性。
    • 3. 发明授权
    • Steerable antenna and receiver interface for terrestrial broadcast
    • 用于地面广播的可导向天线和接收器接口
    • US08125386B2
    • 2012-02-28
    • US12612483
    • 2009-11-04
    • John G. N. HendersonCarl Scarpa
    • John G. N. HendersonCarl Scarpa
    • H01Q3/12H01Q3/00
    • H01Q1/007H01Q1/24H01Q3/2611H01Q7/005
    • Antennas with steerable antenna patterns and techniques for using such antennas are described. In accordance with the invention, antenna patterns with one or more NULLs are used. Through the use of digital control signals the antenna pattern is steered so that a source of signal interference, e.g., a multipath signal, will be located in a NULL. In this manner the received signal's S/N ratio can be maximized thereby facilitating demodulation. The techniques of the invention can be applied to television, computer devices, mobile devices and a wide range of other systems. Digital commands to control an antenna may include multiple information fields, e.g., a direction field, a channel field, a gain field and a polarity field. Antennas incapable of supporting the specified fields disregard information in fields which are not supported. Information in each supported field is decoded and used to adjust the corresponding antenna characteristic.
    • 描述了具有可导向天线方向图和使用这种天线的技术的天线。 根据本发明,使用具有一个或多个NULL的天线方向图。 通过使用数字控制信号,导航天线方向图,使得诸如多路径信号的信号干扰源将位于空值中。 以这种方式,可以使接收信号的S / N比最大化,从而便于解调。 本发明的技术可以应用于电视,计算机设备,移动设备以及各种其它系统。 用于控制天线的数字命令可以包括多个信息字段,例如方向字段,信道字段,增益字段和极性字段。 无法支持指定字段的天线无视不支持的字段中的信息。 每个支持的字段中的信息被解码并用于调整相应的天线特性。
    • 5. 发明授权
    • Steerable antenna and receiver interface for terrestrial broadcast
    • 用于地面广播的可导向天线和接收器接口
    • US07425920B2
    • 2008-09-16
    • US11346643
    • 2006-02-03
    • John G. N. HendersonCarl Scarpa
    • John G. N. HendersonCarl Scarpa
    • H01Q3/24
    • H01Q1/007H01Q1/24H01Q3/2611H01Q7/005
    • Antennas with steerable antenna patterns and techniques for using such antennas are described. In accordance with the invention, antenna patterns with one or more NULLs are used. Through the use of digital control signals the antenna pattern is steered so that a source of signal interference, e.g., a multipath signal, will be located in a NULL. In this manner the received signal's S/N ratio can be maximized thereby facilitating demodulation. The techniques of the invention can be applied to television, computer devices, mobile devices and a wide range of other systems. Digital commands to control an antenna may include multiple information fields, e.g., a direction field, a channel field, a gain field and a polarity field. Antennas incapable of supporting the specified fields disregard information in fields which are not supported. Information in each supported field is decoded and used to adjust the corresponding antenna characteristic.
    • 描述了具有可导向天线方向图和使用这种天线的技术的天线。 根据本发明,使用具有一个或多个NULL的天线方向图。 通过使用数字控制信号,导航天线方向图,使得诸如多路径信号的信号干扰源将位于空值中。 以这种方式,可以使接收信号的S / N比最大化,从而便于解调。 本发明的技术可以应用于电视,计算机设备,移动设备以及各种其它系统。 用于控制天线的数字命令可以包括多个信息字段,例如方向字段,信道字段,增益字段和极性字段。 无法支持指定字段的天线无视不支持的字段中的信息。 每个支持的字段中的信息被解码并用于调整相应的天线特性。
    • 6. 发明授权
    • Television tuning system with electronic frequency adjustment apparatus
    • 具有电子调频装置的电视调谐系统
    • US4402089A
    • 1983-08-30
    • US302853
    • 1981-09-16
    • Stanley P. KnightJohn G. N. Henderson
    • Stanley P. KnightJohn G. N. Henderson
    • H04N5/44H03J3/28H03J5/02H03J5/24H04N5/50H04B1/26
    • H03J3/28H03J5/0263
    • A television (TV) receiver tuning system for selecting one of a plurality of receivable TV channels comprises a frequency selective radio frequency device including trimming elements for receiving TV signals, a local oscillator controlled by a first control signal and a mixer in which the TV signals and the local oscillator signal are heterodyned to develop an intermediate frequency signal. A first control device develops the first control signal in response to the selection of a TV channel to control the local oscillator frequency so that the mixer shifts the selected TV channel signal to the IF frequency. A second control device including a PROM trims the frequency selectivity of the RF device using its trimming elements unaffected by selection of the TV channel whereby mechanical alignment of the TV tuning system can be avoided. In other aspects of the invention, the second control device develops signals for adjusting tunable circuits in the IF amplifier, for adjusting the tracking of the local oscillator frequency in relation to its control signal, and, in a double-conversion tuner, for adjusting the frequency of a second local oscillator.
    • 用于选择多个可接收TV频道中的一个的电视(TV)接收机调谐系统包括:频率选择性射频设备,包括用于接收TV信号的修整元件,由第一控制信号控制的本地振荡器和其中TV信号 并且本地振荡器信号被外差以产生中频信号。 第一控制装置响应于选择TV信道来开发第一控制信号以控制本地振荡器频率,使得混频器将所选择的TV信道信号移位到IF频率。 包括PROM的第二控制装置使用其修整元件修改RF装置的频率选择性,而不受TV选择的影响,从而可以避免TV调谐系统的机械对准。 在本发明的其他方面,第二控制装置产生用于调整IF放大器中的可调谐电路的信号,用于相对于其控制信号调整本地振荡器频率的跟踪,并且在双转换调谐器中,用于调整 第二本地振荡器的频率。
    • 10. 发明授权
    • Signal-seeking tuning system with automatic bandswitching for a
television receiver
    • 信号调谐系统,具有电视接收机的自动频带切换功能
    • US4398303A
    • 1983-08-09
    • US326173
    • 1981-11-30
    • Danny ChinJohn G. N. HendersonRobert J. Maturo
    • Danny ChinJohn G. N. HendersonRobert J. Maturo
    • H03J5/24H03J7/28H04B1/26
    • H03J7/28H03J5/246
    • A signal-seeking tuning system for a television receiver scans the VHF and UHF signal bands until a present TV channel signal is detected. Tuning voltage is developed by a digital-to-analog converter in response to a binary word stored in an up/down counter. The value of the binary word increases when a scan-up signal is applied and decreases when a scan-down signal is applied. Band signals are automatically sequenced to the next higher frequency band when the binary word "rolls-over" from a maximum to a minimum value, or to the next lower frequency band when the binary word rolls-over from its minimum to its maximum value. Scanning is stopped by inhibiting changing of the binary word when a valid sequence of AFT signals is detected.Thereafter, the tuning voltage is compensated for drifts by incrementing or decrementing the binary word whenever the AFT signal departs from a predetermined condition. This correction is inhibited, however, when the binary word is at its minimum or maximum value so that unwanted bandswitching is avoided.
    • 用于电视接收机的信号寻找调谐系统扫描VHF和UHF信号频带,直到检测到当前TV信道信号。 响应于存储在上/下计数器中的二进制字,由数 - 模转换器开发调谐电压。 当施加扫描信号时,二进制字的值增加,并且当施加扫描信号时,该值减小。 当二进制字从最大值转换到最小值时,当二进制字“滚转”时,频带信号自动排序到下一个较高频带,或者当二进制字从最小值翻转到最大值时,到下一个较低频带。 当检测到AFT信号的有效序列时,禁止二进制字的改变来停止扫描。 此后,只要AFT信号偏离预定条件,通过递增或递减二进制字来对调谐电压进行补偿。 然而,当二进制字处于其最小值或最大值时,该校正被禁止,从而避免了不期望的频带切换。