referring now to the drawings , wherein like numerals depict like parts throughout , fig1 illustrates an antenna assembly 20 according to the present invention disposed near the upper rear portion of a hand - held wireless communications device 22 . the antenna is disposed within the housing 24 of the wireless communications device 22 . the antenna assembly 20 according to the present invention includes a resonator structure 26 disposed relative to a ground plane 28 of the wireless communications device 22 . as depicted , the resonator structure 26 of the antenna assembly 20 is disposed at an upper end portion of a printed wiring board ( pwb ) 30 and is operatively coupled to the pwb 30 by a pair of conducting elements 40 , 42 , including a grounding conductor 40 and a feed conductor 42 . feed conductor 42 element includes a first end which is operatively connected at a predetermined position along an edge 64 of the resonator structure 26 . the other end of the feed element 42 is operatively connected to the pwb 30 at the rf 50 ohm input / output terminal or port . the feed element 42 is illustrated as an integrated planar portion of the resonator structure 26 , though an alternative feed element 42 may include a coaxial cable , a microstrip line , or other suitable conductors . the grounding element 40 has two ends , one end of which is operatively coupled to a portion of the resonator structure 26 of the antenna assembly 20 . the other end of the grounding element 40 is operatively connected near the top of the pwb 30 to the ground plane 28 in a conventional manner . the resonator element 26 of the antenna assembly 20 includes a substantially planar top surface 50 defining two separated conductive regions 52 , 54 . the two conductive regions 52 , 54 are coupled together via a conductive bridge element 56 and a capacitive tuning network 71 . resonator element 26 can include first and second front surfaces 60 , 62 and a side surface 64 . resonator structure 26 further defines a pair of removed portions 66 , 68 , the physical size of which may be varied depending on the particular application . the two conductive regions 52 , 54 are disposed in a side - by - side relationship and are operatively coupled by the conductive bridge element 56 and by a capacitor for fixed tuned operation or a capacitive tuning network 71 for electrically tuned function . conductive bridge element 56 is illustrated as an integrated planar portion of resonator structure 26 . alternative embodiments may include a bridge element 56 being a separate conductor , such as a wire , having different dimensions as compared to the bridge element 56 of fig1 - 4 . the first conductive region 52 is sized to resonate at the lower frequency band . the second conductive region 54 is sized to resonate at the higher frequency band and is functionally dependent on the capacitive tuning network 71 coupled between the first and second conductive regions 52 , 54 . in one embodiment , a variable capacitive tuning network 71 has range of approximately 0 . 7 - 1 . 4 picofarads for operation over the 1710 - 1800 mhz frequency band . importantly , the capacitance value of the capacitive tuning network 71 is capable of being selectively varied to tune the resonator over a range of frequencies without changing the physical characteristics of the resonator 26 . in preferred embodiments , the capacitive tuning network 71 may be controlled via a user - manipulated switch , or even via an internal digital controller 70 . in one embodiment , a digital controller 70 may receive control input from the user , an internal program , or from an external signal such as from a cell phone system or wireless datalink base station . the external signal may be extracted from a separate transmitted signal which is received by the antenna 20 or even defined as a portion of or contained within the communication protocol . fig5 illustrates one possible capacitive tuning network 71 for use with the antenna assembly 20 . the two conductive regions 52 , 54 of fig4 are capacitively coupled together by the capacitive tuning element 158 , and a dc blocking capacitor 159 which are components of the tuning network 71 . capacitive tuning element 158 may be a varactor element . analog tuning network 17 of antenna assembly 120 further includes an inductor or rf choke 75 which allows a control voltage to vary the capacitance of the varactor capacitive tuning element 158 . the value of the control voltage may be controlled via a digital controller , d / a and / or cpu or manual switching , as appreciated by those skilled in the relevant arts . in another embodiment , the capacitive tuning network 71 and associated control device 70 may be automatically responsive to a continuously or semi - continuously transmitted signal to aid in maintaining the signal quality , change of protocol of the communications link or to enable encryption . in this regard , a single resonator element 26 may be used to achieve relatively seamless transitions or “ hand - offs ” as the wireless communication device 22 is used between differing rf spectra , encryption , and / or communications protocols . the antenna assemblies 20 , 120 of fig1 - 4 are sized to exhibit a vswr of approximately 2 : 1 over two different frequency bands , such as 880 - 960 mhz and 1710 - 1880 mhz or 824 - 894 mhz and 1850 - 1990 mhz . fig3 illustrates views of the resonator element 26 of the antenna assembly 20 of the present invention . dimensions of the features of the components indicated in fig3 are as follows : fig4 illustrates another embodiment of the antenna assembly 120 according to the present invention . as depicted in fig4 the antenna assembly 120 includes a resonator structure 126 disposed relative to a ground plane 128 of the wireless communications device 122 . as depicted , the resonator structure 126 of the antenna assembly 120 is disposed at an upper end portion of a printed wiring board ( pwb ) 130 and is operatively coupled to the pwb 130 by a feed conductor 142 . feed conductor element 142 includes a first end which is operatively connected at a predetermined position along an edge of the resonator stricture 126 . the other end of the feed element 142 is operatively connected to the pwb 130 at the rf input / output terminal or port . the feed element 142 is illustrated as an integrated planar portion of the resonator structure 126 , though alternative feed elements may include a coaxial cable , a microstrip line or other suitable conductors . the resonator element 126 of fig4 includes a substantially planar top surface 150 defining two separated conductive regions 152 , 154 coupled together via a bridge element 156 and a tuning network 171 , which includes a capacitive tuning element 158 ( see , fig5 ). bridge element 156 of fig4 is illustrated as an integrated planar portion of resonator structure 156 . alternative embodiments may include a bridge structure 156 being a separate conductor , such as a wire , having different dimensions as compared to the bridge element 156 of fig4 . as illustrated in fig5 the two conductive regions 152 , 154 of fig4 may be capacitively coupled together by the capacitive tuning element 158 , and dc blocking capacitor 159 which are components of the tuning network 171 . capacitive tuning element 158 may be a varactor element . analog tuning network 171 antenna assembly 120 further includes an inductor or rf choke 175 which allows a control voltage to vary the capacitance of the varactor capacitive tuning element 158 . the value of the control voltage may be controlled via a digital controller , cpu , or manual switching , as appreciated by those skilled in the relevant arts . the antenna assembly 120 further includes a second tuning network 172 which is coupled between the second conductive region 154 of the resonator 126 and the ground plane 128 of the wireless communications device 122 . the second varactor 159 on tuning network 172 may be controlled in similar manner to the first varactor element 158 , i . e ., via rf choke 176 , a controllable voltage via digital controller , d / a , and cpu . fig6 includes back plan , side , and top elevational views of an antenna assembly according to the present invention . the view of fig6 are not necessarily to view , but illustrate possible orientations and components of a wireless communications device including an antenna assembly according to the present invention . it should be noted that the drawings may indicate proportions and dimensions of components of the antenna device . however , e . g ., thickness of conductive layers have been exaggerated for clarity . although , in many embodiments conductive plates have been mentioned , it is understood that it includes the use of conductive layers , possibly attached to dielectric substrate ( s ). although the invention is described by the above examples , naturally , a skilled person would appreciate that many other variations than those explicitly disclosed are possible within the scope of the invention . additional advantages and modifications will readily occur to those skilled in the art . the invention in its broader aspects is , therefore , not limited to the specific details , representative apparatus and illustrative examples shown and described . accordingly , departures from such details may be made without departing from the spirit or scope of the applicant &# 39 ; s general inventive concept .