Frequency-selective dipole antennas

• US 8,952,858 B2
• Filed: 06/17/2011
• Issued: 02/10/2015
• Est. Priority Date: 06/17/2009
• Status: Active Grant

• Current Assignee: L. Pierre De Rochemont
• Original Assignee: L. Pierre De Rochemont
• Inventors: de Rochemont, L. Pierre
• Primary Examiner(s): LE, HOANGANH T
• Application Number:
  US13/163,654
• Publication Number:
  US 20110248900A1
• Time in Patent Office: 1,334 Days
• Field of Search: 343/803, 343/795, 343/793, 343/820
• US Class Current: 343/803
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 5/15 for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H01Q 9/26 with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength resonant loop antennas H01Q7/00

Abstract

A dipole antenna provides electrical dipole conductors folded to form distributed inductive and/or capacitive reactive loads between selected portions of one or more coupled line segments of the individual dipole conductors or between one dipole conductor to another, wherein the electrical dipole conductors form a selective frequency filter. An antenna provides a substrate, electrical conductors formed on and/or in the substrate, and one or more ceramic dielectric elements having relative permittivity ∈_R≧10 and/or relative permeability μ_R≧10 formed on and/or in the substrate between selected portions of the electrical conductors for determining a distributed reactance within the selected portions. A folded dipole antenna provides conducting dipole arms, a distributed network filter having distributed reactance within and between the conducting dipole arms, and a tunable reactance connected to an input of the distributed network filter for adjusting a resonant frequency of the antenna.

Claims

1. A dipole antenna, comprising:

a selective frequency filter formed on and/or in a substrate by electrical dipole conductors folded to have distributed inductive and capacitive reactive loads between selected portions of one or more coupled line segments of the individual dipole conductors or between one dipole conductor to another, and

one or more ceramic dielectric elements having precise dielectric permittivity and/or permeability formed on and/or in the substrate and located in proximity to the coupled line segments for determining an enhanced distributed reactance in the inductive and/or capacitive reactive loads.

2. The antenna of claim 1, wherein the dipole antenna is formed on and/or in a substrate.

3. The antenna of claim 1, wherein the ceramic dielectric elements have dielectric property that vary less than ±

1% over temperatures between −

40°

C. and +125°

C.

4. The antenna of claim 1, wherein the substrate is a low-loss meta-dielectric material consisting of amorphous silica.

5. The antenna of claim 1, wherein the dipole antenna forms a distributed network that filters a wireless communications band.

6. The antenna of claim 1, wherein the dipole antenna forms a distributed network that filters multiple communications bands.

7. A wireless device comprising the antenna of claim 1.

8. An antenna, comprising:

A substrate;

electrical conductors formed on and/or in the substrate; and

one or more ceramic dielectric elements having relative permittivity ∈

_R≧

10 and/or relative permeability μ

_R≧

10 formed on and/or in the substrate between selected portions of the electrical conductors for determining a distributed reactance within the selected portions.

9. The antenna of claim 8, wherein the antenna is a dipole antenna.

10. The antenna of claim 9, wherein the electrical conductors of the dipole antenna are folded to form a distributed network filter.

11. A wireless device comprising the antenna of claim 8.