GB2335798A - Enhanced bandwidth antenna - Google Patents

Enhanced bandwidth antenna Download PDF

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Publication number
GB2335798A
GB2335798A GB9806507A GB9806507A GB2335798A GB 2335798 A GB2335798 A GB 2335798A GB 9806507 A GB9806507 A GB 9806507A GB 9806507 A GB9806507 A GB 9806507A GB 2335798 A GB2335798 A GB 2335798A
Authority
GB
United Kingdom
Prior art keywords
antenna
patch
larger
pin diode
antennas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9806507A
Other versions
GB9806507D0 (en
GB2335798B (en
Inventor
Olaf Rostbakken
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Technologies UK Ltd
Original Assignee
NEC Technologies UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Technologies UK Ltd filed Critical NEC Technologies UK Ltd
Priority to GB9806507A priority Critical patent/GB2335798B/en
Publication of GB9806507D0 publication Critical patent/GB9806507D0/en
Publication of GB2335798A publication Critical patent/GB2335798A/en
Application granted granted Critical
Publication of GB2335798B publication Critical patent/GB2335798B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Waveguide Aerials (AREA)

Abstract

Patch antennas which are lightweight and occupy a small volume and are therefore especially suitable for mobile phones. The antenna operating bandwidth is switched between transmitter and receiver frequency bands by means of a PIN diode. The PIN diode connects electrically larger and smaller patches which are adjacent to each other on the same substrate but electrically isolated.

Description

2335798 1 Enhanced bandwidth antennas This invention relates to antennas
and in particular it relates to enhanced bandwidth antennas primarily, though not exclusively, for use with mobile phones.
Low profile enhanced bandwidth PIFA antennas are known from the paper by K L Virga and Y Rahmat-Samii, IEEE Transactions on microwave theory and techniques Vol. 45 No. 10 October 1997. In their paper Virga and Y RahmatSarnii discuss the way in which varactor diodes may be used to connect together electrically, two sections of a PIFA element that are separated physically. Such antennas are, however unsuitable for use with mobile communication systems such as GSM and PCN due to the high level of generation of harmonics caused by the varactor diodes.
Directive antennas contained within mobile phone hand sets need to be light in weight and of as small a volume as possible. Microstrip antennas suit these conditions of light weight and small volume but, for thin substrates have relatively narrow bandwidth.
It is an object of this invention to provide a lightweight patch antenna of small volume,, suitable for use with mobile phone hand sets.
According to the invention there is provided a microstrip antenna comprising a larger patch and a smaller patch, both patches formed on the 2 same substrate and the larger and smaller patches connected by a PIN diode and means for applying a voltage to the PIN diode to connect electrically the larger and smaller patches.
According to a further aspect of the invention there is provided a dual band microstrip antenna having a higher frequency antenna and a lower frequency antenna, both antennas formed on the same substrate and each comprising a larger patch and a smaller patch connected by a PIN diode and means for applying a voltage to the PIN diodes to connect electrically the larger and smaller patches.
Two embodiments of the invention will now be explained with reference to the accompanying figures in which:
figure 1 is a plan view of a switchable patch antenna, figure 2 is a side view of the antenna of figure 1, figure 3 is a plan view of a dual band switchable antenna, figure 4 is a side view of the antenna of figure 3.
A first embodiment of the invention is illustrated in figures 1 and 2. The antenna of figures 1 and 2 is for incorporation in a mobile phone which is designed to operate with a single communications system e.g. GSM.
3 With reference to figures 1 and 2, a primary patch 1 is formed on substrate 2 with a feed at 3 and a ground plane at 14. The secondary patch 5 may be switched to connect electrically with primary patch 1 by the application of a voltage (e.g. 3 volts) at 6. A voltage applied at 6 will cause the PIN diode to change from open circuit to short circuit.
Electrical connection of secondary patch 5 to primary patch 1 changes the effective length and consequently the resonant frequency of the patch antenna 1 to provide an antenna suitable for use in a different frequency band. It has been found that PIN diodes as used in this embodiment do not cause unacceptable generation of harmonics.
Therefore instead of the more usual broad antenna bandwidth required to cover the complete range of frequencies for receiver, transmitter and guardband, effectively two antennas of relatively narrow bandwidth are deployed. By means of the switching of PIN diode 4 the antenna operates either in the transmitter band or in the receiver band. Each of the two operating conditions require therefore only a narrow bandwidth.
The thickness (depth) of substrate 2 has an effect on antenna bandwidth such that the thicker the substrate the greater the bandwidth. If required a matching network can be used between the feed 3 and primary patch 1 to increase the bandwidth.
4 A further embodiment of the invention is illustrated in figures 3 and 4. The antenna of figures 3 and 4 is a switchable quarter wave microstrip antenna for incorporation in a so called dual band mobile phone. Dual band phones are designed to be capable of operation with two different communications systems e.g. GSM and PCN.
With reference to figures 3 and 4, two separate switchable antennas are formed on substrate 2. The first antenna, the GSM antenna, comprises a primary patch 1 and secondary patch 5 with a feed at 3. A PIN diode 4 is switched from open circuit to short circuit by the application of a voltage at 6. In this embodiment the shorting pins 7 along one edge of patch 1 are included to reduce the length of the antenna.
The second antenna shown in figures 3 and 4, the PCN antenna, comprises a primary patch 8, a secondary patch 9 and has a feed at 12. The PIN diode 10 is switched from open circuit to short circuit by the application of a voltage at 11. One edge of primary patch 8 is short circuited by shorting -Pins 13.

Claims (5)

Claims
1. A a microstrip antenna comprising a larger patch and a smaller patch, both patches formed on the same substrate and the larger and smaller patches connected by a PIN diode and means for applying a voltage to the PIN diode to connect electrically the larger and smaller patches.
2. A dual band microstrip antenna having a higher frequency antenna and a lower frequency antenna, both antennas formed on the same substrate and each comprising a larger patch and a smaller patch connected by a PIN diode and means for applying a voltage to the PIN diodes to connect electrically the larger and smaller patches.
3. A microstrip antenna as in claims 1 or 2 where the antennas are quarter wave resonant patch antennas.
4. A microstrip antenna as in any previous claim where a matching circuit is included between the antenna and the antenna feed.
5. A microstrip antenna as in any previous claim where one edge of the antenna is short circuited.
GB9806507A 1998-03-26 1998-03-26 Enhanced bandwidth antennas Expired - Fee Related GB2335798B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9806507A GB2335798B (en) 1998-03-26 1998-03-26 Enhanced bandwidth antennas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9806507A GB2335798B (en) 1998-03-26 1998-03-26 Enhanced bandwidth antennas

Publications (3)

Publication Number Publication Date
GB9806507D0 GB9806507D0 (en) 1998-05-27
GB2335798A true GB2335798A (en) 1999-09-29
GB2335798B GB2335798B (en) 2003-01-29

Family

ID=10829327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9806507A Expired - Fee Related GB2335798B (en) 1998-03-26 1998-03-26 Enhanced bandwidth antennas

Country Status (1)

Country Link
GB (1) GB2335798B (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001020718A1 (en) * 1999-09-10 2001-03-22 Avantego Ab Antenna arrangement
WO2001065636A1 (en) * 2000-03-02 2001-09-07 Allgon Mobile Communications Ab A wideband multiband internal antenna device and a portable radio communication device comprising such an antenna device
EP1465287A1 (en) * 2001-12-04 2004-10-06 Matsushita Electric Industrial Co., Ltd. Antenna and apparatus comprising this antenna
WO2005048403A1 (en) * 2003-11-12 2005-05-26 Amc Centurion Ab Antenna device and portable radio communication device comprising such an antenna device
FR2864353A1 (en) * 2003-12-23 2005-06-24 Sagem Transmission/reception antenna for mobile telephone, has plane radiation surface divided into two radiation zones separated by junctions that comprise of switches to resonate entire or part of surface
EP1553658A1 (en) * 2004-01-12 2005-07-13 Delphi Technologies, Inc. Multiplexed self-structuring antenna system
WO2005074070A1 (en) * 2004-02-02 2005-08-11 Amc Centurion Ab Antenna device and portable radio communication device comprising such an antenna device
EP1633018A2 (en) * 2004-09-07 2006-03-08 LG Electronics Inc. Antenna apparatus of mobile communications terminal and operation method thereof
EP1699108A1 (en) * 2005-03-04 2006-09-06 Sagem Communication S.A. Antenna with switchable radiating planes and terminal comprising the same
FR2882874A1 (en) * 2005-03-07 2006-09-08 Sagem Transmission/reception antenna e.g. planar inverted-F antenna, for GSM and UMTS double mode mobile telephone, has symmetrical switch with two active diodes in flip-flop configuration and capacitor ensuring electric symmetry of switch
US7190325B2 (en) 2004-02-18 2007-03-13 Delphi Technologies, Inc. Dynamic frequency selective surfaces
US7250909B2 (en) 2003-08-27 2007-07-31 Matsushita Electric Industrial Co., Ltd. Antenna and method of making the same
EP2071666A1 (en) * 2007-12-12 2009-06-17 Broadcom Corporation Method and system for sharing antennas for high frequency and low frequency applications
US7558555B2 (en) 2005-11-17 2009-07-07 Delphi Technologies, Inc. Self-structuring subsystems for glass antenna
EP2178167A1 (en) * 2008-10-17 2010-04-21 Epcos AG Antenna and method for operating an antenna
WO2010083284A1 (en) * 2009-01-14 2010-07-22 Molex Incorporated Adaptive antenna array
DE102006039645B4 (en) * 2005-08-25 2011-03-10 Samsung Electro-Mechanics Co., Ltd., Suwon Antenna with adjustable resonance frequency
US8380132B2 (en) 2005-09-14 2013-02-19 Delphi Technologies, Inc. Self-structuring antenna with addressable switch controller

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233156A (en) * 1981-03-11 1991-01-02 Secr Defence Electromagnetic radiation sensors
US5394159A (en) * 1993-11-02 1995-02-28 At&T Corp. Microstrip patch antenna with embedded detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233156A (en) * 1981-03-11 1991-01-02 Secr Defence Electromagnetic radiation sensors
US5394159A (en) * 1993-11-02 1995-02-28 At&T Corp. Microstrip patch antenna with embedded detector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
AP-S International Symposium 1986 Digest. Antennas and Propogation (Cat No 86CH2325-9) pp 361-364 *

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001020718A1 (en) * 1999-09-10 2001-03-22 Avantego Ab Antenna arrangement
WO2001065636A1 (en) * 2000-03-02 2001-09-07 Allgon Mobile Communications Ab A wideband multiband internal antenna device and a portable radio communication device comprising such an antenna device
US7046198B2 (en) 2001-12-04 2006-05-16 Matsushita Electric Industrial Co., Ltd. Antenna and apparatus provided with the antenna
EP1465287A1 (en) * 2001-12-04 2004-10-06 Matsushita Electric Industrial Co., Ltd. Antenna and apparatus comprising this antenna
EP1465287A4 (en) * 2001-12-04 2005-02-02 Matsushita Electric Ind Co Ltd Antenna and apparatus comprising this antenna
US7250909B2 (en) 2003-08-27 2007-07-31 Matsushita Electric Industrial Co., Ltd. Antenna and method of making the same
WO2005048403A1 (en) * 2003-11-12 2005-05-26 Amc Centurion Ab Antenna device and portable radio communication device comprising such an antenna device
US7800544B2 (en) 2003-11-12 2010-09-21 Laird Technologies Ab Controllable multi-band antenna device and portable radio communication device comprising such an antenna device
FR2864353A1 (en) * 2003-12-23 2005-06-24 Sagem Transmission/reception antenna for mobile telephone, has plane radiation surface divided into two radiation zones separated by junctions that comprise of switches to resonate entire or part of surface
EP1548877A1 (en) * 2003-12-23 2005-06-29 Sagem SA Multi-band antenna with planar radiating surfaces and portable phone comprising such an antenna
EP1553658A1 (en) * 2004-01-12 2005-07-13 Delphi Technologies, Inc. Multiplexed self-structuring antenna system
US7741998B2 (en) 2004-02-02 2010-06-22 Laird Technologies Ab Antenna device and portable radio communication device comprising such an antenna device
US7893881B2 (en) 2004-02-02 2011-02-22 Laird Technologies Ab Antenna device and portable radio communication device comprising such an antenna device
WO2005074070A1 (en) * 2004-02-02 2005-08-11 Amc Centurion Ab Antenna device and portable radio communication device comprising such an antenna device
US7190325B2 (en) 2004-02-18 2007-03-13 Delphi Technologies, Inc. Dynamic frequency selective surfaces
EP1633018A2 (en) * 2004-09-07 2006-03-08 LG Electronics Inc. Antenna apparatus of mobile communications terminal and operation method thereof
EP1633018A3 (en) * 2004-09-07 2006-03-15 LG Electronics Inc. Antenna apparatus of mobile communications terminal and operation method thereof
US7522120B2 (en) 2004-09-07 2009-04-21 Lg Electronics, Inc. Antenna apparatus of mobile communications terminal and operation method thereof
FR2889360A1 (en) * 2005-03-04 2007-02-02 Sagem RADIANT SURFACE (S) TYPE A (S) ANTENNA (S) COMMUNABLE (S) AND MOBILE COMMUNICATION TERMINAL COMPRISING SAID ANTENNA
EP1699108A1 (en) * 2005-03-04 2006-09-06 Sagem Communication S.A. Antenna with switchable radiating planes and terminal comprising the same
EP1715597A3 (en) * 2005-03-07 2007-04-11 SAGEM Communication Antenna composed of planar surfaces connected by switching circuits
EP1715597A2 (en) * 2005-03-07 2006-10-25 SAGEM Communication Antenna composed of planar surfaces connected by switching circuits
FR2882874A1 (en) * 2005-03-07 2006-09-08 Sagem Transmission/reception antenna e.g. planar inverted-F antenna, for GSM and UMTS double mode mobile telephone, has symmetrical switch with two active diodes in flip-flop configuration and capacitor ensuring electric symmetry of switch
DE102006039645B4 (en) * 2005-08-25 2011-03-10 Samsung Electro-Mechanics Co., Ltd., Suwon Antenna with adjustable resonance frequency
US8380132B2 (en) 2005-09-14 2013-02-19 Delphi Technologies, Inc. Self-structuring antenna with addressable switch controller
US7558555B2 (en) 2005-11-17 2009-07-07 Delphi Technologies, Inc. Self-structuring subsystems for glass antenna
EP2071666A1 (en) * 2007-12-12 2009-06-17 Broadcom Corporation Method and system for sharing antennas for high frequency and low frequency applications
US8583197B2 (en) 2007-12-12 2013-11-12 Broadcom Corporation Method and system for sharing antennas for high frequency and low frequency applications
EP2178167A1 (en) * 2008-10-17 2010-04-21 Epcos AG Antenna and method for operating an antenna
WO2010043715A1 (en) * 2008-10-17 2010-04-22 Epcos Ag Antenna and method for operating an antenna
WO2010083284A1 (en) * 2009-01-14 2010-07-22 Molex Incorporated Adaptive antenna array
CN102349193A (en) * 2009-01-14 2012-02-08 莫列斯公司 Adaptive antenna array

Also Published As

Publication number Publication date
GB9806507D0 (en) 1998-05-27
GB2335798B (en) 2003-01-29

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20040326

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20040326