IP Library › Granted Patent US 8,471,649
Granted Patent B2
US 8,471,649 · App. 12/376,738 · Granted Jun 25, 2013

Ku-band diplexer

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Quick Facts
Patent No.
US 8,471,649
App. No.
12/376,738
Granted
Jun 25, 2013
Kind
B2
Abstract

A compact Ku band microwave diplexer configured as a three port surface mount component on a miniature alumina substrate. Input signals occurring at a common port having frequencies within a first pass band are passed to a second port while being isolated from signals occurring at a third port. Signals occurring at the third port are passed to the common port while being isolated from the signals at the second port. A microstrip dual spur line filter is used combined with open circuit stubs to provide enhanced second harmonic suppression on the transmit side, while using a coupled line microstrip filter on the receive side. This approach allows for compact size and automated component assembly through pick and place and reflow manufacturing techniques.

Claims (9)

1. A microstrip diplexer for providing isolation between a transmitter and a receiver using a common antenna, the diplexer comprising:

an edge coupled band pass filter comprising an open circuit stub on the receiver; and

a dual spur line band stop filter on the transmitter, the dual spur line filter comprising at least one resonator for second harmonic suppression.

2. The microstrip diplexer of claim 1 wherein said edge coupled band pass filter comprises additional open circuit stubs.

3. The microstrip diplexer of claim 1 wherein said dual spurline filter comprises a slotted transmission line.

4. The microstrip diplexer of claim 1 wherein said edge coupled band pass filter further comprises an input tapped line and an output tapped line.

5. The microstrip diplexer of claim 1 wherein said dual spur line band stop filter comprises two cascaded spur line microstrip filters.

6. The microstrip filter of claim 1 wherein edge coupled band pass filter comprises a fourth order edge coupled band pass filter.

7. The microstrip diplexer of claim 1 , wherein said at least one resonator comprises at least one open stub.

Assignments (16)
CORRECTIVE ASSIGNMENT TO CORRECT THE INCORRECT PATENT NUMBER D856640 PREVIOUSLY RECORDED ON REEL 056598 FRAME 0059. ASSIGNOR(S) HEREBY CONFIRMS THE SECOND LIEN PATENT SECURITY AGREEMENT. Recorded Nov 17, 2021
From: OMNITRACS, LLC; ROADNET TECHNOLOGIES, INC.; SMARTDRIVE SYSTEMS, INC.; XRS CORPORATION; HYPERQUEST, LLC (F/K/A HYPERQUEST, INC.); AUDATEX NORTH AMERICA, LLC (F/K/A AUDATEX NORTH AMERICA, INC.); CLAIMS SERVICES GROUP, LLC; DMEAUTOMOTIVE LLC; ENSERVIO, LLC (F/K/A ENSERVIO, INC.); MOBILE PRODUCTIVITY, LLC; SEE PROGRESS, LLC (F/K/A SEE PROGRESS, INC.); SOLERA HOLDINGS, LLC (F/K/A SOLERA HOLDINGS, INC.); EDRIVING FLEET LLC; FINANCE EXPRESS LLC
To: ALTER DOMUS (US) LLC, AS COLLATERAL AGENT
Reel/Frame 058175/0775 →
CORRECTIVE ASSIGNMENT TO CORRECT THE INCORRECT PATENT NUMBER D856640 PREVIOUSLY RECORDED ON REEL 056601 FRAME 0630. ASSIGNOR(S) HEREBY CONFIRMS THE FIRST LIEN PATENT SECURITY AGREEMENT. Recorded Nov 17, 2021
From: OMNITRACS, LLC; ROADNET TECHNOLOGIES, INC.; SMARTDRIVE SYSTEMS, INC.; XRS CORPORATION; HYPERQUEST, LLC (F/K/A HYPERQUEST, INC.); AUDATEX NORTH AMERICA, LLC (F/K/A AUDATEX NORTH AMERICA, INC.); CLAIMS SERVICES GROUP, LLC; DMEAUTOMOTIVE LLC; ENSERVIO, LLC (F/K/A ENSERVIO, INC.); MOBILE PRODUCTIVITY, LLC; SEE PROGRESS, LLC (F/K/A SEE PROGRESS, INC.); SOLERA HOLDINGS, LLC (F/K/A SOLERA HOLDINGS, INC.); EDRIVING FLEET LLC; FINANCE EXPRESS LLC
To: GOLDMAN SACHS LENDING PARTNERS LLC, AS COLLATERAL AGENT
Reel/Frame 058174/0907 →
FIRST LIEN PATENT SECURITY AGREEMENT Recorded Jun 16, 2021
From: OMNITRACS, LLC; ROADNET TECHNOLOGIES, INC.; SMARTDRIVE SYSTEMS, INC.; XRS CORPORATION; HYPERQUEST, LLC (F/K/A HYPERQUEST, INC.); AUDATEX NORTH AMERICA, LLC (F/K/A AUDATEX NORTH AMERICA, INC.); CLAIMS SERVICES GROUP, LLC; DMEAUTOMOTIVE LLC; ENSERVIO, LLC (F/K/A ENSERVIO, INC.); MOBILE PRODUCTIVITY, LLC; SEE PROGRESS, LLC (F/K/A SEE PROGRESS, INC.); SOLERA HOLDINGS, LLC (F/K/A SOLERA HOLDINGS, INC.); EDRIVING FLEET LLC; FINANCE EXPRESS LLC
To: GOLDMAN SACHS LENDING PARTNERS LLC, AS COLLATERAL AGENT
Reel/Frame 056601/0630 →
SECOND LIEN PATENT SECURITY AGREEMENT Recorded Jun 16, 2021
From: OMNITRACS, LLC; ROADNET TECHNOLOGIES, INC.; SMARTDRIVE SYSTEMS, INC.; XRS CORPORATION; HYPERQUEST, LLC (F/K/A HYPERQUEST, INC.); AUDATEX NORTH AMERICA, LLC (F/K/A AUDATEX NORTH AMERICA, INC.); CLAIMS SERVICES GROUP, LLC; DMEAUTOMOTIVE LLC; ENSERVIO, LLC (F/K/A ENSERVIO, INC.); MOBILE PRODUCTIVITY, LLC; SEE PROGRESS, LLC (F/K/A SEE PROGRESS, INC.); SOLERA HOLDINGS, LLC (F/K/A SOLERA HOLDINGS, INC.); EDRIVING FLEET LLC; FINANCE EXPRESS LLC
To: ALTER DOMUS (US) LLC, AS COLLATERAL AGENT
Reel/Frame 056598/0059 →
SECURITY INTEREST RELEASE (REEL/FRAME: 045723/0359) Recorded Jun 8, 2021
From: BARCLAYS BANK PLC, AS GRANTEE
To: OMNITRACS, LLC
Reel/Frame 056516/0442 →
SECURITY INTEREST RELEASE (REEL/FRAME: 053983/0570) Recorded Jun 8, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS GRANTEE
To: OMNITRACS, LLC
Reel/Frame 056518/0684 →
SECOND LIEN PATENT SECURITY AGREEMENT Recorded Oct 6, 2020
From: OMNITRACS, LLC
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
Reel/Frame 053983/0570 →
RELEASE OF SECOND LIEN SECURITY AGREEMENT OF REEL/FRAME 031765/0877 Recorded Mar 26, 2018
From: ROYAL BANK OF CANADA
To: OMNITRACS, LLC
Reel/Frame 045920/0845 →
SECURITY INTEREST Recorded Mar 26, 2018
From: OMNITRACS , LLC
To: BARCLAYS BANK PLC
Reel/Frame 045723/0359 →
RELEASE OF FIRST LIEN SECURITY AGREEMENT OF REEL/FRAME 031765/0877 Recorded Mar 26, 2018
From: ROYAL BANK OF CANADA
To: OMNITRACS, LLC
Reel/Frame 045727/0398 →
CHANGE OF ADDRESS Recorded Jan 25, 2017
From: OMNITRACS, LLC
To: OMNITRACS, LLC
Reel/Frame 041492/0939 →
CHANGE OF NAME Recorded May 2, 2014
From: OMNITRACS, INC.
To: OMNITRACS, LLC
Reel/Frame 032814/0239 →
PATENT ASSIGNMENT AGREEMENT Recorded Apr 30, 2014
From: QUALCOMM INCORPORATED
To: OMNITRACS, INC.
Reel/Frame 032785/0834 →
SECOND LIEN PATENT SECURITY AGREEMENT Recorded Dec 13, 2013
From: OMNITRACS, INC.
To: ROYAL BANK OF CANADA
Reel/Frame 031814/0843 →
FIRST LIEN PATENT SECURITY AGREEMENT Recorded Dec 5, 2013
From: OMNITRACS, INC.
To: ROYAL BANK OF CANADA
Reel/Frame 031765/0877 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 10, 2009
From: DEVEREUX, JEFF; BERGER, FRITZ GERD; JOHNSTON, WILLIAM A.; TASSOUDJI, MOHAMMAD ALI; ALDERN, SCOTT
To: QUALCOMM INCORPORATED
Reel/Frame 022234/0570 →