Walkie-talkie pen
A combination pen and walkie-talkie device includes a walkie-talkie incorporated within the housing of a writing pen such that the walkie-talkie function of the device is well concealed. The antenna of the walkie-talkie is concealed by being entirely enclosed within the pen housing. Examples include a combination pen and walkie-talkie device in which the walkie-talkie circuitry operates at a transmit/receive frequency within a range of from about 462 MHz to about 467 MHz, and/or in which the transmit/receive antenna is a half-wavelength antenna having a free length greater than one foot.
1 . A combination pen and walkie-talkie device, comprising a writing pen including a pen housing having a lower barrel containing a pen nib for writing and an upper barrel above said lower barrel, and a walkie-talkie in said upper barrel of said pen housing, said walkie-talkie including an antenna entirely enclosed within said pen housing, and circuitry coupled to said antenna for alternately transmitting and receiving communications signals using the same frequency.
2 . The device of claim 1 , wherein said same frequency is a frequency within a range of from about 462 MHz to about 467 MHz.
3 . The device of claim 1 , wherein said same frequency is a frequency of about 462 MHz.
4 . The device of claim 1 , wherein said circuitry operates at an effective radiated power less than or equal to about 0.5 Watts.
5 . The device of claim 1 , wherein said antenna comprises wire wound into a coil having a finished length of less than about 1.5 inches.
6 . The device of claim 5 , wherein said coil has a finished length of about 1.25 inches or less.
7 . The device of claim 1 , wherein said antenna is a half-wavelength antenna.
8 . The device of claim 7 , wherein said half-wavelength antenna has a free length greater than about one foot.
9 . The device of claim 1 , wherein said walkie-talkie is built into said pen housing in a manner which at least partially conceals the presence of said walkie-talkie.
10 . A communications system, comprising first and second walkie-talkies configured for direct communications therebetween on a single transmit/receive frequency, wherein each of said first walkie-talkie and said second walkie-talkie is incorporated within separate pen housings of respective pens, each of said respective pens containing a pen nib for writing, and said first and said second walkie-talkie each including a transmit/receive antenna entirely enclosed within said pen housings of said respective pens.
11 . The communications system of claim 10 , wherein said single transmit/receive frequency is a frequency of about 462 MHz.
12 . The communications system of claim 11 , wherein each of said first and said second walkie-talkie includes circuitry for enabling direct communications between said first and said second walkie-talkie on said single transmit/receive frequency, said single transmit/receive frequency being a frequency within a range of from about 462 MHz to about 467 MHz.
13 . The communications system of claim 12 , wherein said circuitry operates at an effective radiated power less than or equal to about 0.5 Watts.
14 . The communications system of claim 10 , wherein said transmit/receive antenna comprises wire wound into a coil having a finished length of less than about 1.5 inches.
15 . The communications system of claim 14 , wherein said coil has a finished length of about 1.25 inches or less.
16 . The communications system of claim 10 , wherein said transmit/receive antenna is a half-wavelength antenna.
17 . The communications system of claim 18 , wherein said half-wavelength antenna has a free length greater than about one foot.
18 . The communications system of claim 10 , wherein said first and said second walkie-talkies are built into said separate pen housings of said respective pens in a manner which at least partially conceals the presence of said first and said second walkie-talkies in said respective pens.