Switchable multiband antenna for the high-frequency and microwave range

• US 20070001906A1
• Filed: 05/05/2004
• Published: 01/04/2007
• Est. Priority Date: 05/16/2003
• Status: Abandoned Application

• Current Assignee: Achim Hilgers, Heiko Pelzer
• Original Assignee: Achim Hilgers, Heiko Pelzer
• Inventors: Hilgers, Achim, Pelzer, Heiko
• Application Number:
  US10/556,448
• Publication Number:
  US 20070001906A1
• Time in Patent Office: Days
• US Class Current: 343/700.MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 9/0442 with particular tuning means
• CPC Class Codes: H01Q 9/14 Length of element or elements adjustable telescopic elements H01Q1/10

Abstract

A description is given of a switchable multiband antenna for the highfrequency and microwave range, which can be operated in a relatively large number of frequency bands without significant restriction of performance in each individual frequency band. This is essentially achieved by a switchable input structure (24) by means of which resonant printed line structures (21; 22) of the antenna that are not required can be isolated from an HF or ground supply line (242). In particular, in one embodiment, a number of resonant printed line structures are applied to a substrate (10), which printed line structures are connected to the corresponding HF or ground supply line or isolated from the latter, in a targeted manner, by means of one or more switching devices.

Claims

1. A switchable multiband antenna for the high-frequency and microwave range, comprising at least one resonant printed line structure (11) which is applied to a substrate (10), and comprising a switchable input structure (12) and at least one line section (122, 124) that is arranged on a support (1) of the substrate (10), wherein the switchable input structure (12) is provided to connect at least one HF line (13;

131, 132) or at least one ground line to the resonant printed line structure (11) by optional interconnection or bridging of the at least one line section (122, 124) by switching the input structure (12).

3. A switchable multiband antenna as claimed in claim 1, wherein the support is a printed circuit board (1) and at least one of the line sections (122, 124) is arranged on the rear side of the printed circuit board (1) which lies opposite the substrate (10).

4. A switchable multiband antenna as claimed in claim 3, wherein the switchable input structure (12) comprises a feed-in point (121) which in a first switching position can be connected to the resonant printed line structure (11) via a first line section (122), a first bushing (123) through the printed circuit board (1), a second line section (124) and a second bushing (125) through the printed circuit board (1), and in a second switching position can be connected directly to the resonant printed line structure (11).

5. A switchable multiband antenna as claimed in claim 1, wherein two HF lines (131, 132) are provided, which can be connected alternatively to a first and a second end of one of the line sections (122, 124) by means of the input structure (12).

9. A switchable multiband antenna as claimed in claim 1, wherein the input structure (12;

24) comprises, for switching purposes, semiconductor switches or microelectromechanical switches (MEMSs).

10. A mobile telecommunications device comprising a support (1) and a switchable multiband antenna as claimed in claim 1.

2. A switchable multiband antenna for the high-frequency and microwave range, comprising at least two resonant printed line structures (21, 22) which are applied to a substrate (10), and comprising a switchable input structure (24) for the optional connection of an HF line (23) or a ground line (242) to at least one of the resonant printed line structures (21, 22).

6. A switchable multiband antenna as claimed in claim 2, wherein the substrate (10) is arranged on one side of a support (1) and the switchable input structure (24) is arranged on the opposite side of the support (1).

7. A switchable multiband antenna as claimed in claim 6, wherein the resonant printed line structures (21, 22) are applied to the side of the substrate (10) which bears against the support (1), with the printed line structures (21, 22) being connected to the switchable input structure (24) via bushings (245, 247).

8. A switchable multiband antenna as claimed in claim 7, wherein the input structure (24) comprises in each case one switch pad (246, 248) which is connected to each bushing (245, 247) and can be connected to the HF line (23) or ground line (242) by switching the input structure (24).