US Patents Issued to Alfred R. Lopez

(Sole or Co-Inventor*)

	Patent No.	Title
1	3,987,453 Oct 1976	Balance Exciter for Wideband Antenna Element
2*	4,041,501 Aug 1977	Limited Scan Array Antenna System With sharp Cutoff of Element Pattern
3*	4,067,014 Jun 1978	Correlation Receiver for Doppler Microwave Landing System
4	4,191,960 Mar 1980	Phased Array Antenna With Reduced Quantization Errors
5	4,321,605 Mar 1982	Array Antenna System
6	4,364,050 Dec 1982	Microstrip Antenna
7	4,554,550 Nov 1985	Resonant Waveguide Aperture Manifold
8	4,670,756 Jun 1987	Phase Shifter Control
9	4,724,440 Feb 1988	Beam Steering Unit Real Time Angular Monitor
10*	4,823,127 Apr 1989	Automatic Real-Time Fault Monitor Verifying Network in a Microwave Landing System
11	4,876,548 Oct 1989	Phased Array Antenna with Coupler in Spatial Filter Arrangement
12	4,912,480 Mar 1990	Offset Phase-Center Antenna for Aircraft Landing System
13	4,968,982 Nov 1990	Aircraft Landing System Having Simplified Out-of-Coverage Indication (OCI)
14*	4,999,639 Mar 1991	Radome Having Integral Heating and Impedance Matching Elements
15	5,111,208 May 1992	Calibration of Plural-Channel System
16	5,177,491 Jan 1993	Navigation Receiver with Beam Asymmetry Immunity
17	5,214,435 May 1993	Near Field Monitor for a Microwave Landing System
18*	5,270,723 Dec 1993	Near field Antenna Measurement Systems and Methods
19	5,304,998 Apr 1994	Dual-Mode Communication Antenna
20*	5,410,319 Apr 1995	Near field Antenna Measurement Systems and Methods
21	5,534,882 Jul 1996	GPS Antenna System
22	5,546,095 Aug 1996	Non-Imaging Glideslope Antenna Systems
23*	5,684,491 Nov 1997	High Gain Antenna Systems for Cellular Use
24*	5,684,794 Nov 1997	Validation of Subscriber Signals in a Cellular Radio Network
25	5,856,810 Jun 1999	Low Sidelobe Multi-Beam Feed Networks for Array Antennas
26	5,872,548 Feb 1999	Space/Angle Diversity Configurations for Cellular Antennas
27*	5,907,816 Mar 1999	High Gain Antenna Systems for Cellular Use
28	5,917,457 Jun 1999	U-Dipole Radiating Elements and Antennas
29*	5,982,337 Nov 1999	Cellular Antennas for Stratosphere Coverage of Multi-Band Annular Earth Pattern
30	6,046,704 Apr 2000	Stamp-and-Bend Double-Tuned Radiating Elements and Antennas
31	6,057,806 May 2000	Cross-Polarized Around-Tower Cellular Antenna System
32	6,160,525 Dec 2000	Low Impedance Loop Antenna
33*	6,201,510 Mar 2001	Self-Contained Progressive-Phase GPS Elements and Antennas
34*	6,229,495 May 2001	Dual-Point-Feed Broadband Whip Antenna
35	6,300,915 Oct 2001	Vertical Array Antennas for Differential GPS Ground Stations
36*	6,473,054 Oct 2002	Array Antennas with Notched Radiation Patterns
37*	6,618,016 Sep 2003	Eight-Element Anti-Jam Aircraft GPS Antennas
38*	6,686,892 Feb 2004	Switchable Length Whip Antenna
39	6,744,412 Jun 2004	High Up/Down Ratio GPS Antenna with Serrated Absorber
40*	6,819,291 Nov 2004	Reduced-Size GPS Antennas for Anti-Jam Adaptive Processing
41*	6,831,601 Dec 2004	Circular Array Scanning with Sum and Difference Excitation
42	6,873,301 Mar 2005	Diamond Array Low-Sidelobe Flat-Plate Antenna Systems for Satellite Communication
43	7,015,866 Mar 2006	Flush Mounted Air Vehicle Array Antenna Systems for Satellite Communication
44	7,030,813 Apr 2006	Array Antennas with Independent Sum and Difference Excitation Levels
45*	7,088,303 Aug 2006	Folded Path Flat-Plate Antennas for Satellite Communication
46	7,119,757 Oct 2006	Dual-Array Two-Port Differential GPS Antenna Systems
47	7,417,597 Aug 2008	GPS Antenna System And Method With Vertically-Steerable Null For Interference Suppression
48	7,450,082 Nov 2008	Small Tuned-Element GPS Antennas for Anti-Jam Adaptive Processing
49	7,583,236 Sep 2009	Wideband Communication Antenna Systems With Low Angle Multipath Suppressions
50	7,982,680 Jul 2011	Antenna Providing Near-Spherical Coverage With Right-Hand Circular Polarization For Differential GPS Use
51	7,990,307 Aug 2011	Integrity Monitor Antenna Systems for GPS-Based Precision Landing System Verification
52	8,390,525 Mar 2013	Circularly Polarized Omnidirectional Antennas and Methods
53	8,493,278 Jul 2013	Antennas and Method to provide Adaptable Omnidirectional Ground Nulls