USRE40750E1 - RF circuit module and chassis including amplifier - Google Patents
RF circuit module and chassis including amplifier Download PDFInfo
- Publication number
- USRE40750E1 USRE40750E1 US09/977,626 US97762601A USRE40750E US RE40750 E1 USRE40750 E1 US RE40750E1 US 97762601 A US97762601 A US 97762601A US RE40750 E USRE40750 E US RE40750E
- Authority
- US
- United States
- Prior art keywords
- module
- chassis frame
- amplifier
- housing
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/08—Constructional details, e.g. cabinet
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1424—Card cages
- H05K7/1425—Card cages of standardised dimensions, e.g. 19"-subrack
Definitions
- This invention pertains to circuits for broad-band RF (radio frequency) systems. More particularly, this invention pertains to modular RF circuit components.
- RF signals i.e., 5 MHz to 1 GHz
- coax conductors from a headend to consumers.
- numberous signals are manipulated to achieve a wide variety of functions and objectives.
- signals carried on the coax cables may need to be amplified, such as for return path applications.
- the signals from numerous coax cables may be combined onto a single coax conductor.
- a signal on a main coax conductor may be divided into a plurality of signals carried on branch coax conductors.
- signals may be added or removed from a main conductor through directional couplers or the like.
- the headend will also include apparatus for modifying signals. For example, in order to adequately tune the system, it may be desirable to provide attenuators or the like to attenuate a signal to a desired level. Further, as a broadband RF signal is carried over a length of cable, the high frequency range of the signal may be attenuated more than a low frequency range of the signal. As a result, equalizers are utilized to modify the signal to have a level intensity throughout its frequency range.
- a common performance criteria is to maintain the flatness of a signal.
- Flatness refers to maintaining a level intensity of a signal throughout its frequency range. For example, if the signal is attenuated by 2 dB at 1 Ghz, then it is desirable that the signal be attenuated at 2 dB at the 5 Mhz frequency. Further, the system needs to be tuned for impedance matching.
- Prior art headends include a wide variety of devices to accommodate and accomplish the functions described above. It is desirable to provide an apparatus to accommodate the various functions required at the headend through a modular construction to permit ease of maintenance and cable management in a headend. Such a device must accommodate the performance characteristics of the headend while permitting the modular construction to enhance the cable management and organization of a headend.
- a chassis and module combination for amplification of a radio frequency signal.
- the amplifier module comprises a housing of electrically conductive material defining an enclosed interior.
- the housing has a front face, and an opposite rear face separated by opposite sidewalls and opposite end walls.
- Each of the faces and sidewalls has a predetermined dimension with the sidewalls being parallel to one another.
- Each of the end walls has a projecting flange extending in a common plane generally parallel to the sidewalls and with the common plane offset from a central longitudinal axis of the housing.
- the front face includes end portions extending beyond each of the end walls. Two coax connectors are secured to the rear face for carrying the radio frequency signal to and from the module.
- a circuit board is contained within an interior of the housing and is positioned generally parallel to and spaced between the sidewalls.
- the circuit board includes an amplifier circuit selected to amplify a radio frequency signal supplied to one of the coax connectors, and to provide the amplified radio frequency signal to the other of the coax connectors.
- a power supply port is also located on the rear face of the module. The power supply port is interconnected to the amplifier circuit within the module through a circuit path of the circuit board.
- a chassis frame for holding the amplifier module comprises a pair of spaced apart walls which are spaced apart by a distance substantially equal to a distance between the end walls of the module.
- Each of the walls of the chassis frame includes a plurality of aligned grooves sized to slidably receive the projecting flanges of the module.
- the grooves are spaced apart along the walls to allow for a predetermined number of similarly configured additional radio frequency modules to be received by the chassis frame.
- the other modules can have the same or other functions.
- a lock member locks at least one of the end portions of the amplifier module to the chassis frame.
- a separate transformer is mounted to the chassis frame wherein the transformer is electrically coupled to the power supply port of the amplifier module for powering the amplifier circuit of the simplifier module.
- the separate transformer can be positioned in a module mountable to the chassis frame in a similar manner as the amplifier module, as desired.
- first and second test coax connectors are secured to the front face of the amplifier module to provide two access monitor test points for the amplifier circuit, one test point to allow for monitoring of the radio frequency signal supplied to the amplifier circuit, the other to allow for monitoring of the radio frequency signal from the amplifier circuit.
- Further preferred features include a tilt circuit, a power on indicator, and a gain potentiometer for the amplifier module.
- FIG. 1 is a front perspective view of two amplifier modules, vertically mounted, and a chassis frame according to one embodiment of the present invention
- FIG. 2 is a rear perspective view of the amplifier modules and chassis frame shown in FIG. 1 , and showing two chassis frame mounted transformers coupled to the amplifier modules;
- FIG. 3 is a front perspective view of one of the amplifier modules
- FIG. 4 is a rear perspective view of the amplifier module of FIG. 3 ;
- FIG. 5 is an exploded front perspective view of the amplifier module of FIG. 3 ;
- FIG. 6 is an exploded rear perspective view of the amplifier module of FIG. 3 ;
- FIG. 7 is an enlarged rear perspective view of a portion of the amplifier module, including portions of the housing broken away for viewing internal components;
- FIG. 8 is an electrical schematic of the amplifier module and external transformer
- FIG. 9 is a front perspective alternative chassis frame including a horizontal mounting of the modules, and where one of the modules is configured and arranged to house a transformer for an amplifier module;
- FIG. 10 is a rear perspective of the embodiment of FIG. 9 ;
- FIG. 11 is a front view of the embodiment of FIG. 9 ;
- FIG. 12 is a rear view of the embodiment of FIG. 9 .
- an amplifier module 10 according to the present invention will be described for use with a chassis frame 12 .
- FIGS. 1 and 2 two modules 10 are shown.
- Each module 10 receives a radio frequency signal and provides an amplified radio frequency signal as an output.
- Module 10 is constructed generally as a modular unit usable with other radio frequency modules and chassis frames as described in U.S. patent application Ser. No. 08/761,525, filed Dec. 6, 1996, the disclosure of which is incorporated by reference.
- the various modules of U.S. application Ser. No. 08/761,525 include splitter/combimer modules, equalizer modules, and directional coupler modules. These modules and other modules which perform various functions on the radio frequency signal required at the headend are usable with the amplifier module 10 of the present invention.
- the module 10 includes a housing 13 having a front face 14 , and a rear face 16 .
- the front face 14 and the rear face 16 are separated by opposing sidewalls 18 , 20 and opposite end walls 22 , 24 .
- the housing 13 is formed of electrically conductive material.
- the material is nickel-plated aluminum.
- Various vent holes 27 are provided to allow air to enter and exit housing 13 .
- Front face 14 also has a ledge 26 a.
- the sidewall 20 is fastened to the ledges 26 , 26 a and rear wall 16 by a plurality of screws 28 received in aligned holes 30 and threaded holes 32 .
- Sidewall 20 is sized to have a length grater than the longitudinal dimension between walls 22 , 24 such that ends 20 a, 20 b extend beyond end walls 22 , 24 as flanges for mounting to chassis frame 12 .
- the front face 14 includes extending end portions 14 a, 14 b which extend beyond end walls 22 , 24 .
- Apertures 14 c, 14 d receive fasteners 29 to lock each module 10 to chassis frame 12 .
- coax connectors 40 , 41 are secured to the rear face 16 .
- Each of coax connectors 40 , 41 is a 75 ohm F-type connector press fit into rear face 16 and includes a central conductor 42 surrounded by a grounded shield 43 .
- the grounded shields 43 of the coax connectors 40 , 41 are in direct physical and electrical contact with the electrically conductive material of the rear face 16 .
- Printed circuit board 44 Contained within the interior of the housing 12 is a printed circuit board 44 .
- the printed circuit board 44 is supported on ports 45 by screws 46 .
- the ports 45 are electrically conductive and connected to wall 18 .
- Printed circuit board 44 includes a component side 44 a and a ground side 44 b.
- the ground side 44 b opposes the wall 18 and the component side 44 a opposes the wall 20 .
- the printed circuit board 44 is maintained in parallel, spaced relation between the walls 18 , 20 by posts 42 .
- a layer 44 c ( FIG. 7 ) of electrically conductive material (such as a sheet layer of copper) is provided on the exterior surface of surface 44 b.
- Two connection locations 48 a, 48 b, are provided on the ground side 44 b of the printed circuit board 44 .
- Each of the connection locations 48 a, 48 b includes a ground connection for connecting the ground shield at the tabs 43 a of the coax connectors 40 , 41 to the conductive layer 44 c, such as by soldering.
- Central conductor 42 of each connector 40 , 41 are also soldered to printed circuit board 44 to component side 44 a at connection locations 48 c, 48 d.
- a plurality of circuit components are disposed on the component side 44 a of the printed circuit board 44 (leaded through hole or surface mount).
- an amplifier circuit 50 (see FIG. 8 ) is included in the circuit components.
- An amplifier module 52 is screwed to the rear face 16 at screw holes 52 b so as to form a heat sink. Pins 53 of the amplifier module 52 plug into sockets on the printed circuit board 44 at connection location 49 a.
- Two cable assemblies 56 , 58 run from the printed circuit board 44 at connection locations 56 a, 58 a to the front face 14 .
- Front face 14 includes two 75 ohm F-type coax cable connectors 59 , 60 mounted to front face 14 , such as with a threaded nut, to form termination points of cable assemblies 56 , 58 which provide front access monitor test points for monitoring the radio frequency signal before and after amplification.
- An indicator circuit 61 mounted to printed circuit board 44 , and including an LED 62 on the front face 14 indicates power on.
- a gain potentiometer 70 with an access adjustment point 72 is also on the front face 14 and can be adjusted (from 0 to 20 dB in the example shown) with a flat head screwdriver.
- a power supply port 90 is mounted adjacent to rear face 16 . Pins 91 of port 90 connect to printed circuit board 44 at connection locations 49 b.
- a transformer 100 connected via cord 101 to an external power source converts 120 volts of alternating current to 24 volts of alternating current.
- Transformer 100 supplies the 24 volts of alternating current to the power supply port 90 through wires 120 .
- the power input of the amplifier module 10 can be minus 48 volts of direct current to the transformer 100 , whereby a suitably configured transformer 100 would convert it to 24 volts of direct current to power the amplifier circuit 50 .
- a full-wave bridge rectifier circuit 120 is provided as part of the power supply circuit for amplifier circuit 50 of amplifier module 10 .
- a heat sink 122 is mounted to printed circuit board 44 at connection location 49 c to provide a heat sink for voltage regulator 124 of rectifier circuit 120 .
- a tilt circuit 130 is provided to compensate for slope in the magnetic and connector features. Such a circuit flattens out the frequency response of the amplifier circuit 50 .
- the cable assemblies 56 , 58 including the monitor coax connectors 59 , 60 draw a 20 dB signal due to the 17.5 dB couplers 140 and the 2.5 dB pads 150 .
- Chassis frame 12 includes spaced apart walls 202 , 204 spaced apart by a distance substantially equal to a distance between the end walls 22 , 24 of the module 10 .
- Each of the walls 202 , 204 includes a plurality of vertically aligned grooves 210 .
- the grooves 210 are sized to slidably receive the projecting flanges 20 a, 20 b of the module 10 such that a module may be slideably inserted into the chassis frame 12 with the modules 10 vertically positioned.
- there are multiple pairs of vertically aligned grooves 210 such that additional modules may be inserted into the chassis frame 12 .
- the grooves 210 are offset from module receiving spaces so that the entire open space between the sidewalls of the chassis frame may be filled with modules. Also, the grooves 210 are spaced apart a distance selected such that as modules as slideably inserted into the frame, adjacent modules are positioned with a small spacing between opposite sidewalls of adjacent modules.
- the locking fasteners 29 are provided through the projecting end portions 14 a, 14 b of the front faces 14 of the module 10 for receipt in corresponding threaded locking holes 216 provided on walls 202 , 204 of chassis frame 12 .
- Transformer 100 is shown separate from amplifier module 10 .
- Transformer 100 is vertically mounted to a vertical side piece 220 of chassis frame 12 .
- Chassis frame extension 220 a (not illustrated in FIG. 2 ) could also be a mounting location for transformer 100 .
- FIGS. 9-12 An alternative chassis frame 12 ′ is shown in FIGS. 9-12 for holding the modules 10 in a horizontal alignment.
- Two pairs of walls 202 ′, 204 ′ are provided, and each wall has the flange receiving grooves 210 ′.
- transformer 100 is a wall mounted unit separate from module 10
- the transformer can also be internal to its own module 10 ′ also separate from amplifier module 10 which is received by one of the chassis frames 12 , 12 ′.
- FIGS. 9-12 illustrate transformer module 10 ′ having an internal transformer disposed within housing 13 ′.
- Power supply post 240 links an external power source (i.e., 120 volts a.c., ⁇ 48 volts d.c.) over wires 242 to transformer module 10 ′.
- the internal transformer outputs the proper voltage through port 240 over wires 244 to the power supply port 90 of amplifier module 10 .
- Power on indicator 260 provided visual output whether transformer module 10 ′ is supplied with external power.
- transformer module 10 ′ can be two or more modules 10 in width between walls 18 ′ and 20 ′, as desired, to provide more internal space for components.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
Claims (55)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/977,626 USRE40750E1 (en) | 1997-12-10 | 2001-10-12 | RF circuit module and chassis including amplifier |
US12/454,700 USRE43820E1 (en) | 1997-12-10 | 2009-05-20 | RF circuit module and chassis including amplifier |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/988,047 US5966648A (en) | 1997-12-10 | 1997-12-10 | RF circuit module and chassis including amplifier |
US09/977,626 USRE40750E1 (en) | 1997-12-10 | 2001-10-12 | RF circuit module and chassis including amplifier |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/988,047 Reissue US5966648A (en) | 1997-12-10 | 1997-12-10 | RF circuit module and chassis including amplifier |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/988,047 Continuation US5966648A (en) | 1997-12-10 | 1997-12-10 | RF circuit module and chassis including amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE40750E1 true USRE40750E1 (en) | 2009-06-16 |
Family
ID=25533800
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/988,047 Ceased US5966648A (en) | 1997-12-10 | 1997-12-10 | RF circuit module and chassis including amplifier |
US09/977,626 Expired - Lifetime USRE40750E1 (en) | 1997-12-10 | 2001-10-12 | RF circuit module and chassis including amplifier |
US12/454,700 Expired - Lifetime USRE43820E1 (en) | 1997-12-10 | 2009-05-20 | RF circuit module and chassis including amplifier |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/988,047 Ceased US5966648A (en) | 1997-12-10 | 1997-12-10 | RF circuit module and chassis including amplifier |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/454,700 Expired - Lifetime USRE43820E1 (en) | 1997-12-10 | 2009-05-20 | RF circuit module and chassis including amplifier |
Country Status (4)
Country | Link |
---|---|
US (3) | US5966648A (en) |
CN (2) | CN1154252C (en) |
HK (2) | HK1021597A1 (en) |
TW (1) | TW447220B (en) |
Cited By (2)
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---|---|---|---|---|
USRE43820E1 (en) * | 1997-12-10 | 2012-11-20 | Atx Networks Corp. | RF circuit module and chassis including amplifier |
US20230065118A1 (en) * | 2021-09-01 | 2023-03-02 | Sidus Space, Inc. | Electromagnetic interference (emi) filter unit and associated methods |
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JP3889885B2 (en) * | 1998-02-27 | 2007-03-07 | シャープ株式会社 | Millimeter-wave transmitter, millimeter-wave receiver, millimeter-wave transmission / reception system, and electronic device |
US6046913A (en) * | 1998-04-24 | 2000-04-04 | Lucent Technologies Inc. | Panel mounted power module with adaptor mounting bracket |
JP3315969B2 (en) * | 2000-05-09 | 2002-08-19 | 株式会社ソニー・コンピュータエンタテインメント | Electronics |
WO2002033953A2 (en) * | 2000-10-18 | 2002-04-25 | Honeywell International Inc. | Modular entertainment and data system |
US6707686B2 (en) * | 2001-02-28 | 2004-03-16 | Adc Telecommunications, Inc. | Telecommunications chassis and card |
US6637845B2 (en) | 2001-02-28 | 2003-10-28 | Adc Telecommunications, Inc. | Telecommunications chassis and card with flame spread containment |
US6940730B1 (en) | 2001-02-28 | 2005-09-06 | Adc Telecommunications, Inc. | Telecommunications chassis and card |
US6590782B2 (en) * | 2001-02-28 | 2003-07-08 | Adc Telecommunications, Inc. | Telecommunications chassis and card |
US7245717B2 (en) * | 2001-05-18 | 2007-07-17 | Adc Telecommunications, Inc. | Telecommunications chassis and card |
US6824312B2 (en) * | 2001-06-04 | 2004-11-30 | Adc Telecommunications, Inc. | Telecommunications chassis and module |
US6842075B2 (en) * | 2001-06-06 | 2005-01-11 | Anadigics, Inc. | Gain block with stable internal bias from low-voltage power supply |
US6753734B2 (en) | 2001-06-06 | 2004-06-22 | Anadigics, Inc. | Multi-mode amplifier bias circuit |
US6842348B2 (en) | 2002-05-31 | 2005-01-11 | Pci Technologies, Inc. | RF circuit modules and integrated chassis with power interface for RF circuit modules |
AU2003902711A0 (en) * | 2003-05-30 | 2003-06-19 | Motium Pty Ltd | An electronic enclosure and mounting arrangement therefor |
JP4186732B2 (en) * | 2003-07-24 | 2008-11-26 | 株式会社村田製作所 | Electronics |
CA2912369C (en) * | 2003-09-15 | 2018-03-20 | Atx Networks Corp. | Signal management system |
CN101147436B (en) * | 2005-04-01 | 2011-06-15 | 艾利森电话股份有限公司 | Device for telecom equipment |
US8223777B2 (en) * | 2005-11-15 | 2012-07-17 | Oracle International Corporation | Gateway for achieving low latency and high availability in a real time event processing system |
US7381098B2 (en) | 2006-04-11 | 2008-06-03 | Adc Telecommunications, Inc. | Telecommunications jack with crosstalk multi-zone crosstalk compensation and method for designing |
CN100495830C (en) * | 2007-06-06 | 2009-06-03 | 华为技术有限公司 | A single-board hardware device and RF blind insertion connection device |
CN101471677B (en) * | 2007-12-27 | 2013-01-23 | 华为技术有限公司 | Centralization installation backboard of distributed equipment and combination of radio frequency module and installation backboard |
US7841909B2 (en) | 2008-02-12 | 2010-11-30 | Adc Gmbh | Multistage capacitive far end crosstalk compensation arrangement |
CN101673617B (en) * | 2008-09-10 | 2011-11-16 | 富士康(昆山)电脑接插件有限公司 | Electric connector system |
CN101673613B (en) * | 2008-09-10 | 2011-08-10 | 富士康(昆山)电脑接插件有限公司 | Electric connector system |
CN101673616B (en) * | 2008-09-10 | 2011-08-10 | 富士康(昆山)电脑接插件有限公司 | Electric connector system |
CN101673615B (en) * | 2008-09-10 | 2011-08-10 | 富士康(昆山)电脑接插件有限公司 | Electric connector system |
CN101673612B (en) * | 2008-09-09 | 2011-08-10 | 富士康(昆山)电脑接插件有限公司 | Electric connector system |
CN101673614B (en) * | 2008-09-10 | 2011-08-10 | 富士康(昆山)电脑接插件有限公司 | Electric connector system |
US8731603B2 (en) * | 2009-01-06 | 2014-05-20 | Adc Telecommunications, Inc. | RF circuit module and panel |
AU2009202010A1 (en) * | 2009-05-21 | 2010-12-09 | Adc Gmbh | Chassis for coupling a stack of two or more telecommunications modules to a front side of a racking system |
US10152032B2 (en) * | 2016-08-19 | 2018-12-11 | Siemens Industry, Inc. | System and method for controlling and monitoring environmental conditions in a building using an integrated rack |
CN111727376B (en) * | 2018-11-09 | 2022-05-13 | 皇家飞利浦有限公司 | Radio frequency power amplifier and assembling method thereof |
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- 1998-12-10 CN CNB981253288A patent/CN1154252C/en not_active Expired - Lifetime
- 1998-12-10 CN CN2004100346275A patent/CN1536774B/en not_active Expired - Lifetime
-
2000
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Title |
---|
Exhibit A "Headend Combining/Splitting Network," Cox Communications, undated. 16 pages. |
Exhibit B Crutchfield Catalog. Summer 1994. p. 60. |
Exhibit C Text and drawings of U.S. Appl. No. 08/761,525, filed Dec. 6, 1996. |
Exhibit D Text and drawings of U.S. Appl. No. 08/900,187, filed Jul. 25, 1997. |
Exhibit E Text and drawings of U.S. Appl. No. 08/761,776, filed Dec. 6, 1996. |
Exhibit F Text and drawings of U.S. Appl. No. 08/761,723, filed Dec. 6, 1996. |
Exhibit G ADC Telecommunications, Inc. Catalog, "Video Signal Distribution Products," 2 front cover pages. pp. 1-17. and back cover page, dated Oct. 1996. |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE43820E1 (en) * | 1997-12-10 | 2012-11-20 | Atx Networks Corp. | RF circuit module and chassis including amplifier |
US20230065118A1 (en) * | 2021-09-01 | 2023-03-02 | Sidus Space, Inc. | Electromagnetic interference (emi) filter unit and associated methods |
US11839028B2 (en) * | 2021-09-01 | 2023-12-05 | Sidus Space, Inc. | Electromagnetic interference (EMI) filter unit and associated methods |
Also Published As
Publication number | Publication date |
---|---|
HK1070199A1 (en) | 2005-06-10 |
US5966648A (en) | 1999-10-12 |
CN1154252C (en) | 2004-06-16 |
HK1021597A1 (en) | 2000-06-16 |
CN1224958A (en) | 1999-08-04 |
TW447220B (en) | 2001-07-21 |
CN1536774A (en) | 2004-10-13 |
CN1536774B (en) | 2010-12-08 |
USRE43820E1 (en) | 2012-11-20 |
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