1. A method for forming a post hole in the ground, comprising:
positioning a post hole digger over a post installation site on the ground, the post hole digger comprising a pair of shaft portions each comprising a handle slidably coupled to a base, wherein the post hole digger further comprises a pair of blades each coupled to the base of a respective one of the shaft portions;
independently sliding the handles along the bases from a raised position downwardly toward the ground into a lowered position to impact an impact plate of the post hole digger in force transmitting communication with the blades to drive the blades into the ground;
independently sliding the handles along the bases upwardly from the lowered position into the raised position; and
temporarily locking each handle in place relative to a respective base, wherein temporarily locking each handle in place relative to the respective base consists of independently rotating each handle relative to the respective base and independently lifting each handle relative to the respective base.
2. The method of claim 1, wherein:
independently sliding the handles along the bases from the raised position downwardly toward the ground into the lowered position and independently sliding the handles along the bases upwardly from the lowered position into the raised position comprises guiding respective pins of the handles along respective alignment slots formed in the bases; and
rotating the handles relative to the respective bases to temporarily lock the handles in place comprises guiding the respective pins of the handles along respective U-shaped portions of the alignment slots.
3. The method of claim 2, further comprising retracting the pins out of the alignment slots, rotating the handles relative to the bases, and extending the pins into engagement with respective apertures formed in the bases to more permanently lock the handles in place.
4. A hand tool, comprising:
a base comprising a first impact surface and a slot, the slot comprising two parallel tracks coupled together by an intermediate track extending substantially perpendicular to the two parallel tracks;
a handle slidably coupled to the base, the handle comprising a second impact surface, the handle being slidable relative to the base such that the second impact surface of the handle impacts the first impact surface of the base, wherein the handle further comprises a pin engageable with the slot of the base, the pin being movably retained by the slot as the handle slides relative to the base; and
a tool attachment coupled to the base.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An antenna structure comprising a ground plane, one and only one planar feed element, one and only one planar parasitic element (230), one and only one feed conductor (203) and one and only one short-circuit conductor, the feed conductor being coupled to the feed element (240) and the short-circuit conductor being connected to the parasitic element, which, being larger in surface area than the planar feed element, is a main radiating element, and said feed element, which is not connected to the short-circuit conductor, being electromagnetically coupled to said parasitic element.
2. A structure according to claim 1, characterized in that said feed element is arranged to resonate at substantially the same frequency as said parasitic element.
3. A structure according to claim 1, characterized in that said parasitic element (230) and said feed element (240) are separate conductive regions on a surface of a dielectric plate (208).
4. A structure according to claim 1, characterized in that said parasitic element (330) and said feed element (340) are separate self-supporting conductive bodies.
5. A structure according to claim 1, characterized in that said parasitic element viewed from said short-circuit point (S), is divided into two branches having certain resonance frequencies.
6. A radio apparatus (MS) comprising an antenna (700) having a ground plane, one and only one planar feed element, one and only one planar parasitic element, one and only one feed conductor and one and only one short-circuit conductor, the feed conductor being coupled to the feed element and the short-circuit conductor being connected to the parasitic element, which, being larger in surface area than the planar feed element, is a main radiating element, and said feed element, which is not connected to the short circuit conductor, being electromagnetically coupled to said parasitic element, which parasitic element is short-circuited at a single point to the ground plane.
7. An antenna structure comprising a ground plane, planar feed element and a planar parasitic element, characterized in that said feed element (240) is coupled to a feed conductor (203) of the antenna structure and electromagnetically coupled to said parasitic element (230) which is short-circuited at a single point (S) to the ground plane, wherein the antenna structure additionally comprises a whip element which, when pulled out, is in galvanic contact with said feed element.