Pair Of Sleeves Research Articles

Suppression of Cross-Band Scattering by Using Sleeve Loads

A method to suppress cross-band scattering is presented in this letter. A two-antenna system is analyzed, which consists of a lower-band (LB) dipole and a higher-band (HB) dipole. A pair of sleeves is loaded on the arms of the LB dipole. The cross-band scattering between the HB and LB antennas close to each other usually deteriorates the pattern of the HB antenna. In the proposed antenna system, the sleeves loaded on the arms of the LB dipole are used to suppress the induced current on the LB antenna and reduce the cross-band scattering in the two-dipole system, which restores the radiation pattern of the HB antenna. A prototype of the proposed antenna system is fabricated and measured. The results show that the maximum radiation direction of the HB antenna is changed from a maximum of 24 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$^\circ$</tex-math></inline-formula> back to 0 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$^\circ$</tex-math></inline-formula> in the <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$H$</tex-math></inline-formula> -plane.

Seventeenth-Century Baby Clothes? The Problems of Identification

This article follows a study of a collection of baby clothes assumed to be of late seventeenth-century date to ascertain whether or not that assumption might be correct. The collection is unusual in containing caps, rare in themselves but also decorated with lace frills in the adult frelange style; a rare pair of sleeves with paned oversleeves; and christening and other items for wear by a swaddled infant which are more common in known collections but here, more unusually, trimmed with Flemish bobbin lace. The article discusses the items in terms of their relationships with each other, their construction, their fabrics and how they were worn. Comparisons with similar and related articles in other collections and in seventeenth-century portraits of adults and children enable the author to conclude that the articles probably do date from the late seventeenth century but from slightly different decades.

COMPACT TOP-LOADED MONOPOLE ANTENNA WITH A PAIR OF SLEEVES ON THE GROUND PLANE FOR MULTI-BAND WLAN APPLICATIONS

A novel printed top-loaded monopole antenna with a pair of sleeves on the ground plane for multiband wireless local area network (WLAN) applications is presented. This antenna is composed of a top-loaded monopole and two sleeves on a ground plane. Both the antenna and the ground plane are printed on the same side of an inexpensive FR4 substrate. This antenna has light weight and compact size of only 29× 45× 0.5mm3. The operation bandwidth of this proposed antenna covers 2.4 GHz/5.2 GHz/5.8GHz WLAN bands and 7.4 GHz∼8.8GHz for UWB application, which perfectly meet the requirement of multiband working. The measured and simulated results agree well with each other. Corresponding author: J. Chen (jinchen@mail.xidian.edu.cn).

Talking doll having extendible appendages

A toy figure includes a generally spherical torso supporting a pair of outwardly extending sleeves which in turn receive a pair of slidably supported arms. A second pair of sleeves supported on the torso receive a pair of slidably supported legs. An additional sleeve is positioned upon the toy figure head and receives a slidably supported shaft having a ball member at its outer end. A plurality of switches are positioned within the toy figure and are actuated as the arms, legs and head shaft are moved inwardly and outwardly. A sound circuit is supported within the toy figure and is responsive to actuation of the various switches therein to produce audible message or sound effects. The toy figure head further supports a pair of ears slidably movable in a lateral direction within the head.

Personal stereo speaker assembly

A personal stereo speaker assembly adapted to be supported by the temple pieces of eyeglasses worn by the user includes a pair of sleeves adapted to receive respective temple pieces therein. Secured to and depending from each sleeve so as to at least partially cover an opening of the user's ears is an envelope preferably made from a natural or synthetic cloth or fiber such as cotton, canvas, or GoreTex. The envelopes are adapted to snugly enclose and support respective standard miniature speakers approximately at the ear openings. The speakers are operatively connected to a jack or plug by means of respective audio leads; the plug is adapted to connect to portable personal audio equipment such as radios and cassette players.

Structurally damped bolt

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