Information processing apparatus

• US 5,978,655 A
• Filed: 11/07/1995
• Issued: 11/02/1999
• Est. Priority Date: 11/08/1994
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Oyama, Masumi, Ohura, Seiji, Saitoh, Tetsuo, Yokota, Tsuneshi
• Primary Examiner(s): TO, DORIS HA
• Application Number:
  US08/554,522
• Time in Patent Office: 1,456 Days
• Field of Search: 342/42, 342/44, 342/51, 455/92, 455/106, 455/557, 455/558, 455/575, 455/63, 455/41, 455/73, 455/77, 455/78, 455/82, 455/83, 455/84, 455/88, 455/89, 455/90, 455/95, 455/97, 455/128, 455/129, 455/145, 455/269 , 455/272, 455/275, 455/278.1, 455/283, 455/295, 455/296, 455/317, 455/344, 455/346, 455/347-349, 455/351, 375/219, 375/377, 375/259, 343/702, 343/742, 343/867, 235/492, 235/449, 235/380, 235/382, 235/382.5, 340/572, 340/825.54, 340/825.34
• US Class Current: 455/41.1
• CPC Class Codes: G06K 7/10346 the antenna being of the far field type, e.g. HF types or dipoles
• CPC Class Codes: G06K 7/10881 constructional details of hand-held scanners
• CPC Class Codes: H01Q 1/08 Means for collapsing antennas or parts thereof collapsible loop antennas H01Q7/02; means for collapsing H-antennas or Yagi antennas H01Q19/04
• CPC Class Codes: H01Q 1/2216 used in interrogator/reader equipment
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

An information processing apparatus has a transmission antenna and a reception antenna and performs radio transmission/reception with a radio card via the two antennas, thereby performing predetermined information processing. Each of the transmission antenna and reception antenna is formed of a loop antenna. Both antennas are made to overlap each other by a predetermined length so as to prevent mutual electromagnetic interference and are situated in substantially the same plane. Accordingly, even if the transmission antenna and reception antenna are situated close to each other, a signal radiated from the transmission antenna is prevented from interfering with the reception antenna. Thus, the reception antenna can surely receive only a signal radiated from the radio card or an object of communication.

Claims

1. A portable information processing apparatus for Performing radio data transmission/reception with an information storage medium having a transmission/reception antenna for use in both transmission and reception and having a radio communication function thereby performing predetermined information processing, said apparatus comprising:

a transmission antenna, formed in a loop shape for radiating a first carrier wave of a first radio frequency;

a reception antenna for receiving a second carrier wave of a second radio frequency from said information storage medium, said reception antenna being provided in parallel to said transmission antenna and situated to overlap said transmission antenna by a predetermined length, thereby to reduce electromagnetic mutual interference with said transmission antenna; and

adjusting means for adjusting the length of the overlapping portion of the transmission antenna and the reception antenna, whereby an optimal positional relationship between the transmission antenna and the reception antenna is determined to reduce the electromagnetic mutual interference to a minimum.

2. A portable radio card reader writer for performing radio data transmission/reception with a radio card having a transmission/reception antenna for use in both transmission and reception and having a radio communication function, thereby performing predetermined information processing, said portable radio card reader/writer comprising:

processing means for generating transmission data to be transmitted to the radio card and for processing reception data received from the radio card;

display means for displaying data processed by said processing means;

input means for inputting data to be processed by said processing means;

tuning circuit means for transmission, tuned to a first radio frequency, for generating a first carrier wave including said transmission data;

a transmission antenna, formed in a loop shape, for radiating said first carrier wave;

a reception antenna for receiving a second carrier wave of a second radio frequency from said radio card, said reception antenna being provided in parallel to said transmission antenna and situated to overlap said transmission antenna by a predetermined length, thereby to reduce electromagnetic mutual interference with said transmission antenna;

tuning circuit means for reception, tuned to the second radio frequency, for receiving the second carrier wave including the reception data from the radio card; and

means for sliding said transmission antenna and said reception antenna relative to each other, wherein said transmission antenna and said reception antenna are slid relative to each other to a stop position, thereby arranging both antennas such that both antennas overlap each other by said predetermined length,

wherein said radio card reader/writer can be folded into a plurality of parts.

3. A portable radio card reader/writer for performing radio data transmission/reception with a radio card having a transmission/reception antenna for use in both transmission and reception and having a radio communication function, thereby performing predetermined information processing, said portable radio card reader/writer comprising:

processing means for generating transmission data to be transmitted to the radio card and for processing reception data received from the radio card;

display means for displaying data processed by said processing means;

input means for inputting data to be processed by said processing means;

tuning circuit means for transmission, tuned to a first radio frequency, for generating a first carrier wave including said transmission data;

a transmission antenna, formed in a loop shape, for radiating said first carrier wave;

a reception antenna for receiving a second carrier wave of a second radio frequency from said radio card, said reception antenna being provided in parallel to said transmission antenna and situated to overlap said transmission antenna by a predetermined length, thereby to reduce electromagnetic mutual interference with said transmission antenna;

tuning circuit means for reception, tuned to the second radio frequency, for receiving the second carrier wave including the reception data from the radio card; and

means for folding said transmission antenna and said reception antenna toward each other, wherein said transmission antenna and said reception antenna are unfolded away from each other, thereby arranging both antennas such that both antennas overlap each other by said predetermined length,

wherein said radio card reader/writer can be folded into a plurality of parts.

4. A data transmission/reception method in a portable information processing apparatus for performing radio data transmission/reception with an information storage medium having a transmission/reception antenna for use in both transmission and reception and having a radio communication function, thereby performing predetermined information processing, said method comprising:

radiating a first carrier wave of a first radio frequency from a transmission antenna formed in a loop shape;

receiving a second carrier wave of a second radio frequency from said information storage medium by means of a reception antenna provided in parallel to said transmission antenna and situated to overlap said transmission antenna by a predetermined length, thereby to reduce electromagnetic mutual interference with said transmission antenna; and

adjusting the length of the overlapping portion of the transmission antenna and the reception antenna, whereby an optimal positional relationship between the transmission antenna and the reception antenna is determined to reduce the electromagnetic mutual interference to a minimum.

5. A data transmission/reception method in a portable radio card reader/writer for performing radio data transmission/reception with a radio card having a transmission/reception antenna for use in both transmission and reception and having a radio communication function, wherein said radio card reader/writer can be folded into a plurality of parts, thereby performing predetermined information processing, said method comprising:

generating transmission data to be transmitted to the radio card and processing reception data received from the radio card;

inputting data to be processed in said processing step;

displaying the data processed in said processing step;

generating a first carrier wave including said transmission data by means of a tuning circuit for transmission which is tuned to a first radio frequency;

radiating said first carrier wave by means of a transmission antenna formed in a loop shape;

receiving a second carrier wave of a second radio frequency from said radio card by means of a reception antenna, said reception antenna being provided in parallel to said transmission antenna and situated to overlap said transmission antenna by a predetermined length, thereby to reduce electromagnetic mutual interference with said transmission antenna;

receiving the second carrier wave including the reception data from the radio card by means of a tuning circuit for reception which is tuned to the second radio frequency; and

sliding said transmission antenna and said reception antenna relative to each other, wherein said transmission antenna and said reception antenna are slide relative to each other to a stop position, thereby arranging both antennas such that both antennas overlap each other by said predetermined length.

6. A data transmission/reception method in a portable radio card reader/writer for performing radio data transmission/reception with a radio card having a transmission/reception antenna for use in both transmission and reception and having a radio communication function, thereby performing predetermined information processing, wherein said radio card reader/writer can be folded into a plurality of parts, and said method comprising:

generating transmission data to be transmitted to the radio card and processing reception data received from the radio card,

inputting data to be processed in said processing step;

displaying the data processed in said processing step;

generating a first carrier wave including said transmission data by means of a tuning circuit for transmission which is tuned to a first radio frequency;

radiating said first carrier wave by means of a transmission antenna formed in a loop shape;

receiving a second carrier wave of a second radio frequency from said radio card by means of a reception antenna, said reception antenna being provided in parallel to said transmission antenna and situated to overlap said transmission antenna by a predetermined length, thereby to reduce electromagnetic mutual interference with said transmission antenna;

receiving the second carrier wave including the reception data from the radio card by means of a tuning circuit for reception which is tuned to the second radio frequency; and

folding said transmission antenna and said reception antenna toward each other, wherein said transmission antenna and said reception antenna are unfolded away from each other, thereby arranging both antennas such that both antennas overlap each other by said predetermined length.