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Antenna

A technology of antenna and disc-cone antenna, which is applied in the direction of antenna, resonant antenna, antenna parts, etc., can solve the problem of not having to extend the coaxial cable, etc., and achieve the effect of low cost and low cross section

Inactive Publication Date: 2006-03-15
COCOMO MB COMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Prior art disk cones do not have a coaxial cable extending through the cone section

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0072] First, the initial data is taken in the free space range, which includes figure 1 ground plane shown. Antenna matching is shown in the Figure 6 . From 600MHz to 1800MHz, the voltage standing wave ratio (VSWR) is less than 2:1. From 580MHz to 2GHz, VSWR is less than 3:1. Azimuth and elevation pattern patterns are shown in Figures 7 to 11. The omnidirectionality of the azimuth pattern is within 1dB from 800MHz to 1.5GHz, and less than 2dB to 1.9GHz. The elevation pattern is typically cardioid-shaped across the frequency band. The 0 degree reference position is at the base of the ground plane. The results were deemed suitable, and the next stage was to carry out tests of the antenna installed on the car.

example 2

[0074] figure 1 The antenna is placed 9 inches from the centerline of the car's front bumper. The measured return loss is shown in FIG. 14 and the measured VSWR is shown in FIG. 13 . From 620MHz to 2GHz, VSWR is less than 3:1. The effect of VSWR on the car is quite small, as with Figure 6as shown in the comparison. The measured pattern patterns are shown in Figures 14 through 16 for 850MHz, 1575MHz, and 1850MHz and heights of 1, 3, and 5 feet (the transmitter was located about 10 feet from the car). The 850MHz frequency generally provides the same response, however, the forward wave The lobe is typically 20dB higher than the backward lobe. The 1575MHz frequency provides better coverage for heights of 1-3 feet above ground and 10 feet away, but it decreases at heights of 5 feet. At 1575MHz, the forward lobe is typically 20dB stronger than the backward lobe. At 1850MHz, the forward lobe is typically 20dB stronger than the backward lobe, and the pattern level decreases sli...

example 3

[0076] The relative gains of the simulated cellular phone stub antenna, the GSM stub antenna and the PCS stub antenna are shown in Figures 18 to 20 for comparison with the antenna of the present invention. The antenna of the present invention is stronger in most areas except the rear direction. The stub antenna for each unit is located on the console between the driver and passenger. The stub antenna was mounted vertically to match the test antenna polarization. The test range layout is shown in Figure 21.

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Abstract

An antenna system, particularly for vehicles. A discone-type antenna is preferably utilized for frequencies outside the vehicle. At various frequencies, either or both the antenna and the vehicle serve as exciters.

Description

[0001] Cross-references to related patent applications [0002] This patent application claims priority to U.S. Patent Application Serial No. 10 / 412,371, filed April 11, 2003, entitled "Antenna," Chadwick, filed November 27, 2000, U.S. Patent Application Serial No. 635,402, entitled "In-Vehicle Exciter," and U.S. Patent No. 635,402, filed May 30, 2002, to Chadwick et al., entitled "Exciter System and Excitation Methods for Communications Within and Very Near to Vehicles" Continuation-in-Part of Application Serial No. 10 / 160,747, the patent specification and claims of which are hereby incorporated by reference. technical field [0003] The present invention relates to antennas, exciter systems and communication systems for vehicles such as automobiles, trucks, trains, buses, ships and aircraft. Background technique [0004] It should be noted that the following discussion refers to a number of publications identified by author and year of publication, some of which are not c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/32H01Q13/00H01QH01Q1/28H01Q1/34H01Q9/28
CPCH01Q9/28H01Q1/3275H01Q1/28H01Q1/3291H01Q1/34H01Q13/00H01Q1/32H01Q1/12
Inventor 乔治·G.·查德维克
Owner COCOMO MB COMM INC