CN104022343A - Multi-band antenna - Google Patents
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- CN104022343A CN104022343A CN201410284099.2A CN201410284099A CN104022343A CN 104022343 A CN104022343 A CN 104022343A CN 201410284099 A CN201410284099 A CN 201410284099A CN 104022343 A CN104022343 A CN 104022343A
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Abstract
The invention discloses a multi-band antenna, which comprises a substrate, a coplanar microstrip transmission line structure laid on the front surface of the substrate and a main radiating body laid on the front surface of the substrate, wherein the main radiating body comprises a first rectangular radiating part and a second inverted trapezoidal radiating part positioned at the lower end of the first radiating part, and a reverse L-shaped groove is formed in the right upper corner of the first radiating part; the lower end of the second radiating part is connected to the coplanar microstrip transmission line structure; a surround radiating branch comprises a first radiating branch rightwards extending from the right lower end of the first radiating part, a second radiating branch leftwards extending from the left upper end of the first radiating part and a third radiating branch, one end of the third radiating branch is connected with the first radiating branch, upwards extends along the right side edge of the substrate, leftwards extends along the upper side edge of the substrate and downwards extends along the left side edge of the substrate, and the other end of the third radiating branch is connected with the second radiating branch. According to the technical scheme, the surrounding radiating branch and the main radiating body with the groove can support the frequency band of 2 to 4.2Ghz, and the frequency bands of lower than 2Ghz can also be supported.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of multiband aerial.
Background technology
Along with the development of wireless communication technology, in the wireless networks such as mobile radio communication, wireless MAN, WLAN (wireless local area network), radio broadcasting, application is improved and dropped into various wireless communication standard gradually, occurred the situation that various wireless communication standard coexists.
In the standard of mobile radio communication, GSM (Global System for Mobile communication, global system for mobile communications), be still current application one of wireless communication standard the most widely, conventionally work in 900Mhz frequency range or 1800Mhz frequency range.LTE (Long Term Evolution, Long Term Evolution) be by 3GPP (The3rd Generation Partnership Project, third generation partner program) Long Term Evolution of UMTS (Universal Mobile Telecommunications System, the universal mobile telecommunications system) technical standard organized to set up.The frequency range of China TD-LTE is mainly distributed in 1.8/2.3/2.6Ghz frequency range, is specially: 1880-1900MHz, the 2320-2370MHz of China Mobile, 2575-2635MHz frequency range; The 2300-2320MHz of CHINAUNICOM, 2555-2575MHz frequency range; The 2370-2390MHz of China Telecom, 2635-2655MHz frequency range.
WiMAX (Worldwide interoperability for Microwave Access, worldwide interoperability for microwave access) standard in metropolitan area network, claims again 802.16 standards, operates mainly in the frequency range of 2.5/3.5/5.5Ghz.
WLAN (Wireless Local Area Network, WLAN (wireless local area network)) is operated in without the 2.4/5Ghz frequency range of authorizing.
DAB (Digital Audio Broadcasting, digital audio broadcasting) in radio broadcasting, works in the III frequency range of 217.5-230.0MHz or the L frequency range of 1228-1575MHz conventionally.
At present, the multiband aerial of supporting multiband is integrated in mobile intelligent terminal equipment, the ability that makes mobile intelligent terminal equipment possess the access network of multi-mode (different mode is operated in different frequency conventionally) has become development trend.
A kind of master of structure of existing multiband aerial looks schematic diagram, elevational schematic view respectively as shown in Figure 1 a, 1 b, this multiband aerial comprises: substrate 101, be arranged on the main radiator 102 of the rectangle in substrate 101 fronts, the first parasitic radiation body 103 of rectangle, the second parasitic radiation body 104 of rectangle and the trixenie radiant body 105 of rectangle, be arranged on the ground plane 106 at substrate 101 back sides, feed line 107.
104 points of the first parasitic radiation bodies 103, the second parasitic radiation body are positioned at the both sides of main radiator 102, and all parallel relative with main radiator 102; Trixenie radiant body 105 is positioned at the upside of main radiator 102, parallel relative with main radiator 102, and is connected with main radiator 102 by metal wire.The heart yearn of feed line 107 penetrates substrate 101 and is connected to main radiator 102.
Although, by reasonably selecting material and the size of substrate 101, and position and the position of distributing point in main radiator 102 between size, the radiant body of each radiant body are reasonably set, can make existing multiband aerial can support the frequency range of 2-2.6Ghz; The frequency range of 2-2.6Ghz has covered the 2.3/2.6Ghz frequency range of LTE, the 2.4Ghz frequency range of WLAN, the 2.5Ghz frequency range of WiMAX.Obviously, this multiband aerial cannot be supported the frequency range of frequency lower than 2Ghz.
Therefore, be necessary to provide that a kind of bandwidth is wider, the more multiband aerial of band support, to realize single multiband aerial on the basis of frequency range of supporting LTE, WiMAX, WLAN, support the frequency range of frequency lower than 2Ghz.
Summary of the invention
The defect existing for above-mentioned prior art, the invention provides a kind of multiband aerial, can, on the basis of frequency range of supporting LTE, WiMAX, WLAN, support the frequency range of frequency lower than 2Ghz.
A kind of multiband aerial, comprises substrate, is layed in the positive Coplanar stripline structure of described substrate; It also comprises:
Be layed in the positive main radiator of described substrate, it comprises that being shaped as the upper right corner offers the first radiant section of the rectangle of anti-L-type groove, and is positioned at the first radiant section lower end and is shaped as the second radiant section of inverted trapezoidal; Wherein, the lower end of the second radiant section is connected with described Coplanar stripline structure;
Around radiation minor matters, comprise the first radiation minor matters that the right edge from the bottom righthand side of the first radiant section to described substrate extends, the second radiation minor matters of extending to the limit, left side of described substrate from the left upper end of described the first radiant section, and one end be connected with the first radiation minor matters and along the right edge of described substrate upwards extend, along the upper side edge of described substrate extend left, along the limit, left side of described substrate to the 3rd radiation minor matters downward-extension, that the other end is connected with the second radiation minor matters.
Further, described multiband aerial, also comprises:
Parasitic radiation minor matters, its from described the 3rd radiation minor matters, extend to the upper side edge of described substrate along the limit, left side of described substrate to the minor matters of downward-extension, and the back side that extends to described substrate is L-type.
Preferably, described Coplanar stripline structure specifically comprises: one end is connected with the lower end of the second radiant section, the other end extends to the banded transmission line of the lower side of described substrate, and is shaped as the first ground plane that the upper right corner offers the rectangle of right-angled triangle otch, is shaped as the upper left corner and offers the second ground plane of the rectangle of right-angled triangle otch;
The first ground plane, the second ground plane divide and are positioned at described transmission line left side, right side, and are all separated with described transmission line.
Preferably, the length of the limit, left side of the first radiant section, lower side is respectively 24.93mm, 33.75mm;
Anti-L-type groove in the first radiant section comprises: vertical slot and translot;
The length and width of described vertical slot is respectively 19.5mm, 5mm; The length of described translot is 5-11.5mm, and wide is 5-10mm; And
The wide of the first radiation minor matters is 1-4mm.
Preferably, described substrate is rectangle;
The limit, left side along described substrate in the 3rd radiation minor matters is to the minor matters of downward-extension, and spacing distance between the limit, left side of the first radiant section is 4.925mm;
Minor matters that the upper side edge along described substrate in the 3rd radiation minor matters extends left, and spacing distance between the second radiation minor matters is 3.6-18.6mm, and spacing distance between the upper side edge of the first radiant section is 0.42-15.42mm;
The width of the second radiation minor matters and the 3rd radiation minor matters is all 1-4mm; The minor matters of extending left along the upper side edge of described substrate in the 3rd radiation minor matters, along the limit, left side of described substrate to the minor matters of downward-extension, and the length sum of the second radiation minor matters is 59.8-74.8mm.
Preferably, the minor matters of L-type described in described parasitic radiation minor matters, specifically comprise: the minor matters along the right edge at the back side of described substrate to downward-extension, and the minor matters of extending left along the upper side edge at the back side of described substrate;
In the minor matters of described L-type, the width of the minor matters of extending left along the right edge at the back side of described substrate to the minor matters of downward-extension, with the upper side edge at the back side along described substrate is all 1-4mm;
In the minor matters of described L-type, the length sum of the minor matters of extending left along the right edge at the back side of described substrate to the minor matters of downward-extension, with the upper side edge at the back side along described substrate is 6.9-12mm.
Preferably, the minor matters of L-type described in described parasitic radiation minor matters, specifically comprise: the minor matters along the right edge at the back side of described substrate to downward-extension, and the minor matters of extending left along the upper side edge at the back side of described substrate;
In the minor matters of described L-type, the width of the minor matters of extending left along the right edge at the back side of described substrate to the minor matters of downward-extension, with the upper side edge at the back side along described substrate is all 1-4mm;
In the minor matters of described L-type, the length sum of the minor matters of extending left along the right edge at the back side of described substrate to the minor matters of downward-extension, with the upper side edge at the back side along described substrate is 6.9-12mm.
Preferably, described main radiator, be integrated around radiation minor matters and parasitic radiation minor matters.
Preferably, the material of the described substrate epoxy resin that specifically dielectric constant is 4.4, loss tangent is 0.025; And
Described main radiator, described Coplanar stripline structure and the material around radiation minor matters are all specifically Copper Foils; And
The material of described parasitic radiation minor matters is all specifically Copper Foil.
In technical scheme of the present invention, by optimizing the shape and size of main radiator in multiband aerial, increase and arrange around radiation minor matters, make multiband aerial can resonance in 1.75-4.2Ghz frequency range, make the single multiband aerial can be on the basis of frequency range of supporting LTE, WiMAX, WLAN, support the frequency range of frequency lower than 2Ghz, the frequency range of for example GSM.
And, in this multiband aerial, also optimized around the spacing between the spacing between each minor matters, minor matters and main radiator in radiation minor matters, make this multiband aerial can resonance in 1.39-1.48Ghz frequency range, thereby can support the frequency range of DAB.
Further, in this multiband aerial, be also provided with parasitic radiation minor matters, make this multistage antenna can resonance in 5.1-6Ghz, further widened the frequency range that this multiband aerial is supported.
Brief description of the drawings
Fig. 1 a is that the master of the structure of existing multiband aerial looks schematic diagram;
Fig. 1 b is the elevational schematic view of the structure of existing multiband aerial, in Fig. 1 a A to schematic diagram;
The master that Fig. 2, Fig. 3, Fig. 4, Fig. 5 are respectively the structure of the multiband aerial of the embodiment of the present invention looks schematic diagram depending on schematic diagram, schematic side view, schematic top plan view and the back of the body;
Fig. 6 is the schematic diagram of the right-angled triangle otch in the second ground plane upper left corner in the multiband aerial of the embodiment of the present invention, i.e. the schematic diagram of Fig. 2 centre circle A part after amplifying;
Fig. 7 is the schematic diagram from main apparent direction rectangular coordinate system foundation, substrate back of the embodiment of the present invention;
Fig. 8 is the emulation and measurement curve synoptic diagram of the return loss of the multiband aerial of the embodiment of the present invention;
Fig. 9 is the greatest irradiation gain measurement value curve synoptic diagram of each frequency range of the multiband aerial of the embodiment of the present invention;
Figure 10, Figure 11 be respectively the embodiment of the present invention multiband aerial just, the three-dimensional perspective schematic diagram at the back side.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, referring to accompanying drawing and enumerate preferred embodiment, the present invention is described in more detail.But, it should be noted that, many details of listing in specification are only used to make reader to have a thorough understanding to one or more aspects of the present invention, even if do not have these specific details also can realize these aspects of the present invention.
The present inventor considers, can be in multiband aerial, the some radiation minor matters that are connected with main radiator electricity the shape and size of optimizing main radiator are set, make main radiator can receive and dispatch the wireless signal of different frequency range from different radiation minor matters combinations, thereby realize single multiband aerial and can, on the basis of frequency range of supporting LTE, WiMAX, WLAN, support the frequency range of frequency below 2Ghz.
Specifically introduce the technical scheme of the embodiment of the present invention below in conjunction with accompanying drawing.
The master of the structure of multiband aerial provided by the invention looks schematic diagram as shown in Figure 2, comprise: substrate 201, be layed in substrate 201 positive Coplanar stripline structure 202, be layed in the positive main radiator 203 of substrate 201, and around radiation minor matters 204.
Main radiator 203 comprises: be shaped as the upper right corner and offer the first radiant section 231 of the rectangle of anti-L-type groove, and be positioned at second radiant section 232 that is shaped as inverted trapezoidal of the first radiant section 231 lower ends.The lower end of the second radiant section 232 is connected with coplanar microstrip transmission line structure 202.Anti-L-type specifically refers to and the symmetrical shape of L-type.
Comprise around radiation minor matters 204: the first radiation minor matters 241 of extending to the right edge of substrate 201 from the bottom righthand side of the first radiant section 231 of main radiator 203, the second radiation minor matters 242 of extending to the limit, left side of substrate 201 from the left upper end of the first radiant section 231, and one end is that be connected with the first radiation minor matters 241 and along the right edge of substrate 201 upwards extend, along the upper side edge of substrate extend left, along the limit, left side of substrate 201 to the 3rd radiation minor matters 243 downward-extension, that the other end is connected with the second radiation minor matters 242.
The multiband aerial of the embodiment of the present invention, by slotting in main radiator, and set up be connected with main radiator around radiation minor matters, increase the electrical length of irradiation structure, make multiband aerial in widening bandwidth, the frequency that this antenna can resonance is extended to low frequency, thereby make multiband aerial on the basis of frequency range of supporting LTE, WiMAX, WLAN, support the frequency range below 2Ghz.
The frequency range of supporting in order further to widen the multiband aerial of the embodiment of the present invention, schematic side view, schematic top plan view and the back of the body of multiband aerial are looked schematic diagram, as shown in Fig. 3, Fig. 4, Fig. 5, also comprise respectively: parasitic radiation minor matters 205.
Parasitic radiation minor matters 205 from around the 3rd radiation minor matters 243 radiation minor matters 204, along the limit, left side of substrate 201 in the minor matters of downward-extension, extend to the upper side edge of substrate 201, and the back side that extends to substrate 201 is L-type.
In the multiband aerial of the embodiment of the present invention, Coplanar stripline structure 202 specifically comprises: one end is connected with the lower end of the second radiant section 232 of main radiator 203, the other end extends to the banded transmission line 221 of the lower side of substrate 201, and is shaped as the first ground plane 222 that the upper right corner offers the rectangle of right-angled triangle otch, is shaped as the upper left corner and offers the second ground plane 223 of the rectangle of right-angled triangle otch.
223 points of the first ground planes 222, the second ground plane are positioned at transmission line 221 left sides, right side, and are all separated with transmission line 221.
In the multiband aerial of the embodiment of the present invention, the limit, left side of the first radiant section 231 in main radiator 203, the length of lower side are respectively 24.93mm, 33.75mm.
As shown in Figure 2, the anti-L-type groove in the first radiant section 231 comprises: vertical slot 301 and translot 302.The upper side edge of the upper side edge of vertical slot 301 and the first radiant section 231 is in same straight line, and the right edge at the right edge of vertical slot 301 and the first radiant section 231 unslotted places is in same straight line.The length and width of vertical slot 301 is respectively 19.5mm, 5mm; The length of translot 302 is 5-11.5mm, and wide is 5-10mm.
The longer base of the second radiant section 232 and the lower side of the first radiant section 231 equal in length; Length, the height on the shorter base of the second radiant section 232 are respectively 3.25mm, 5.25mm.
Be 8.125mm around the length of the first radiation minor matters 241 in radiation minor matters 204, width is 1-4mm.
Main radiator 203 with resonance together with the first radiation minor matters 241 around in radiation minor matters 204 in the first frequency range.
The frequency range of supporting in order further to widen the multiband aerial of the embodiment of the present invention, as shown in Figure 2, the substrate 201 in multiband aerial is rectangle, the length on the length limit of this rectangle is respectively 54mm, 53mm.
The limit, left side along substrate 201 in the 3rd radiation minor matters 243 is to the minor matters of downward-extension, and spacing distance between the limit, left side of the first radiant section 231 is 4.925mm.
The minor matters that the upper side edge along substrate 201 in the 3rd radiation minor matters 243 extends left, and the spacing distance between the second radiation minor matters 242 is 3.6-18.6mm, and spacing distance between the upper side edge of the first radiant section 231 in main radiator 203 is 0.42-15.42mm.
The width of the second radiation minor matters 242 and the 3rd radiation minor matters 243 is all 1-4mm; Particularly, the width of the minor matters of extending left along the upper side edge of substrate 201 in the 3rd radiation minor matters 243, along the limit, left side of substrate 201 to the width of the minor matters of downward-extension, all equates with the width of the second radiation minor matters 242, is all 1-4mm.
The minor matters of extending left along the upper side edge of substrate 201 in the 3rd radiation minor matters 243, along the limit, left side of substrate 201 to the minor matters of downward-extension, and the length sum of the second radiation minor matters 242 is 59.8-74.8mm.
In radiation minor matters 204, the minor matters of extending left along the upper side edge of substrate 201 in the 3rd radiation minor matters 243, along the limit, left side of substrate 201 to the minor matters of downward-extension, and the second radiation minor matters 242 together resonance in the second frequency range.
In the multiband aerial of the embodiment of the present invention, for the translot 302 in the anti-L-type groove of the first radiant section 231 in main radiator 203, when the width of this translot increases, the frequency of the first frequency range is by substantially constant to entirety reduction and bandwidth; When the width of this translot reduces, the frequency of the first frequency range is by substantially constant to entirety rising and bandwidth.
When the length of translot 302 increases, the low-limit frequency in the first frequency range will raise, but the return loss of the centre frequency of the first frequency range will reduce, and the centre frequency in the second frequency range will increase the return loss of rising and the second frequency range; When the length of translot 302 reduces, the low-limit frequency in the first frequency range will reduce, but the return loss of the centre frequency of the first frequency range will increase, and the centre frequency in the second frequency range will reduce and the return loss of the second frequency range will reduce.
While increasing for the width of the first radiation minor matters 241, the first radiation minor matters 241 around in radiation minor matters 204, the frequency of the first frequency range is by substantially constant to entirety rising and bandwidth; When the width of the first radiation minor matters 241 reduces, the frequency of the first frequency range is by substantially constant to entirety reduction and bandwidth.
For the second radiation minor matters 242 around in radiation minor matters 204 and the width of the 3rd radiation minor matters 243, in the time that this width increases, the centre frequency of the second frequency range increases the bandwidth of rising and the second frequency range to some extent; In the time that this width reduces, the centre frequency of the second frequency range reduces the bandwidth of reduction and the second frequency range to some extent.
For the spacing distance between the minor matters of extending left along the upper side edge of substrate 201 in the 3rd radiation minor matters 243 and the second radiation minor matters 242, or the spacing distance between the first radiant section 231 of the minor matters of extending left along the upper side edge of substrate 201 in the 3rd radiation minor matters 243 and main radiator 203, in the time that this spacing distance increases, the highest frequency of the first frequency range will increase reduction, low-limit frequency return loss substantially constant and the first frequency range, and the centre frequency of the second frequency range will increase the return loss of reduction and the second frequency range; In the time that this spacing distance reduces, the highest frequency of the first frequency range will reduce rising, low-limit frequency return loss substantially constant and the first frequency range, and the centre frequency of the second frequency range will reduce the return loss of rising and the second frequency range.
More excellent, in main radiator 203, in the anti-L-type groove of the first radiant section 231, the length and width of translot 302 is respectively 11.5mm, 7.5mm.Be 3.2mm around the wide of the first radiation minor matters 241 in radiation minor matters 204.Now, the frequency range of the first frequency range is specially 1.75-4.2G, has covered the 1.8/1.9Ghz frequency range of GSM, the 1.8/2.3/2.6Ghz frequency range of LTE, the 2.4Ghz frequency range of WLAN, the 2.5/3.5Ghz frequency range of WiMAX; And be all less than-10dB of the return loss of arbitrary frequency in the first frequency range.
More excellent, in radiation minor matters 204, the width of the second radiation minor matters 242 and the 3rd radiation minor matters 243 is all 3.2mm; Particularly, the minor matters of extending left along the upper side edge of substrate 201 in the 3rd radiation minor matters 243, along the limit, left side of substrate 201 to the minor matters of downward-extension, and the width of the second radiation minor matters 242 is all 3.2mm.Spacing distance between the minor matters of extending left along the upper side edge of substrate 201 in the 3rd radiation minor matters 243 and the second radiation minor matters 242 is 6.9mm; Spacing distance between the first radiant section 231 of the minor matters of extending left along the upper side edge of substrate 201 in the 3rd radiation minor matters 243 and main radiator 203 is 3.72mm.The minor matters of extending left along the upper side edge of substrate 201 in the 3rd radiation minor matters 243, along the limit, left side of substrate 201 to the minor matters of downward-extension, and the length sum of the second radiation minor matters 242 is 63.1mm.Now, the frequency range of the second frequency range is specially 1.39-1.48G, has covered the 1.45Ghz frequency range of DAB, the 1.4Ghz frequency range of LTE; And be all less than-10dB of the return loss of arbitrary frequency in the second frequency range.
In the multiband aerial of the embodiment of the present invention, the minor matters of the L-type in parasitic radiation minor matters 205, as shown in Figure 5, specifically comprise: the minor matters along the right edge at the back side of substrate 201 to downward-extension, and the minor matters of extending left along the upper side edge at the back side of substrate 201.
In the minor matters of the L-type in parasitic radiation minor matters 205, the width of the minor matters of extending left to the minor matters of downward-extension, with the upper side edge at the back side along substrate 201 along the right edge at the back side of substrate 201 equates, is all 1-4mm.
In the minor matters of the L-type in parasitic radiation minor matters 205, the length sum of the minor matters of extending left along the right edge at the back side of substrate 201 to the minor matters of downward-extension, with the upper side edge at the back side along substrate 201 is 6.9-12mm.
The minor matters resonance of the L-type in parasitic radiation minor matters 205 is in the 3rd frequency range.
In the multiband aerial of the embodiment of the present invention, for the minor matters of the L-type in parasitic radiation minor matters 205, the length of the minor matters of extending left for the upper side edge at the back side along substrate 201 in the minor matters of this L-type, in the time that this length increases, the centre frequency of the 3rd frequency range and low-limit frequency all will reduce, return loss will increase; In the time that this length reduces, the centre frequency of the 3rd frequency range and low-limit frequency all will reduce rising, return loss.
For the minor matters of the L-type in parasitic radiation minor matters 205, length for from the right edge at the back side along substrate 201 in the minor matters of this L-type to the minor matters of downward-extension, in the time that this length increases, the centre frequency of the 3rd frequency range and low-limit frequency all will reduce, return loss will increase; In the time that this length reduces, the centre frequency of the 3rd frequency range and low-limit frequency all will reduce rising, return loss.
More excellent, the minor matters of the L-type in parasitic radiation minor matters 205, in the projection in substrate 201 fronts falls within the scope around the 3rd radiation minor matters 243 in radiation minor matters 204.Particularly, in the minor matters of the L-type in parasitic radiation minor matters 205, the width of the minor matters of extending left along the right edge at the back side of substrate 201 to the minor matters of downward-extension, with the upper side edge at the back side along substrate 201 is all 3.2mm; The length sum of the minor matters of extending left along the right edge at the back side of substrate 201 to the minor matters of downward-extension, with the upper side edge at the back side along substrate 201 is 9.1mm.Now, specifically 5.1-6Ghz of the frequency range of the 3rd frequency range, has covered the 5Ghz frequency range of WLAN, the 5.5Ghz frequency range of WiMAX; And the be all less than-10dB of return loss of arbitrary frequency in the 3rd frequency range.
In the multiband aerial of the embodiment of the present invention, in Coplanar stripline structure 202, the length and width of banded transmission line 221 is respectively 15mm, 3.25mm.
The upper side edge of the first ground plane 222 in Coplanar stripline structure 202, the length of right edge are respectively (24.975-a) mm, (15-b) mm.A, b represent respectively two right angle length of sides in the right-angled triangle otch in the upper right corner in the first ground plane 222.The upper side edge of the second ground plane 223, the length on limit, left side are respectively (24.975-c) mm, (15-d) mm.C, d represent respectively two right angle length of sides in the right-angled triangle otch in the upper left corner in the second ground plane 223.Can adjust by adjustment a, b, c, d the impedance operator of whole multiband aerial.More excellent, a equals c, and b equals d.
The right edge of the first ground plane 222, the limit, left side of the second ground plane 223 are parallel relative with the left and right side of transmission line 221 respectively.Spacing distance between the first ground plane 222 and transmission line 221, between the second ground plane 223 and transmission line 221 can be 0.4mm; Particularly, between the right edge of the first ground plane 222 and the limit, left side of transmission line 221, the spacing distance between the limit, left side of the second ground plane 223 and the right edge of transmission line 221 is all 0.4mm.
Lower mask body is introduced a special case of the multiband aerial of the embodiment of the present invention.
As shown in Figure 1, from main depending on direction (vertically pointing to the back side of substrate 201 from the front of substrate 201), for the front of substrate 201, taking the summit in its lower left corner as initial point, taking the straight line at place, long limit of crossing this summit in this front as transverse axis (X-axis), taking the straight line at minor face place of crossing this summit in this front as the longitudinal axis (Y-axis), set up the rectangular coordinate system in substrate 201 fronts.In this positive rectangular coordinate system, the unit length of X-axis and Y-axis is all 1mm.
The coordinate of positive each summit of substrate 201 in this positive rectangular coordinate system is respectively (0,0), (54,0), (54,53) and (0,53).
Each summit of main radiator 203, coordinate in positive rectangular coordinate system is respectively (38.875,45.18), (10.125,45.18), (10.125,20.25), (25.375,15), (28.625,15), (43.875,20.25), (43.875,25.68), (27.375,25.68), (27.375,33.18), (38.875,33.18).
Coordinate around each summit of radiation minor matters 204 in the positive rectangular coordinate system of substrate 201 is respectively (10.125,38.8), (2,38.8), (2,53), (5.2,53), (5.2,52.1), (52,52.1), (52,22.48), (43.875,22.48), (43.875,25.68), (48.8,25.68), (48.8,48.9), (5.2,48.9), (5.2,42), (10.125,42).
Coordinate around each summit of the first radiation minor matters 241 in radiation minor matters 204 in the positive rectangular coordinate system of substrate 201 is respectively (43.875,22.48), (43.875,25.68), (52,25.68), (52,22.48); The coordinate of each summit of the second radiation minor matters 242 in the positive rectangular coordinate system of substrate 201 is respectively (10.125,38.8), (5.2,38.8), (5.2,42), (10.125,42); In the second radiation minor matters 243, along the limit, left side of substrate 201 to each summit of the minor matters of downward-extension, coordinate in the rectangular coordinate system in substrate 201 fronts is respectively (5.2,38.8), (2,38.8), (2,53), (5.2,53); Each summit of the minor matters of extending left in the second radiation minor matters 243, along the upper side edge of substrate 201, coordinate in the rectangular coordinate system in substrate 201 fronts is respectively (5.2,52.1), (52,52.1), (52,48.9), (5.2,48.9); In the second radiation minor matters 243, along each summit of the upwardly extending minor matters of right edge of substrate 201, coordinate in the rectangular coordinate system in substrate 201 fronts is respectively (48.8,48.9), (52,48.9), (52,25.68), (48.8,25.68).
In Coplanar stripline structure 202, each summit of transmission line 221, the coordinate in the rectangular coordinate system in substrate 201 fronts is respectively (25.375,15), (25.375,0), (28.625,0), (28.625,15).
In Coplanar stripline structure 202, the coordinate of each summit of the first ground plane 222 in the rectangular coordinate system in substrate 201 fronts is respectively (0,0), (24.975,0), (24.975,15-b), (24.975-a, 15), (0,15); The coordinate of each summit of the second ground plane 223 in the rectangular coordinate system in substrate 201 fronts is respectively (29.025,0), (54,0), (54,15), (29.025+a, 15), (29.025,15-b).A is the real number between 0-24.975, and b is the real number between 0-15.
Between the first ground plane 222 and transmission line 221, between the second ground plane 223 and transmission line 221, all leave the gap of long (15-b) mm, wide 0.4mm.As shown in Figure 6, can, by changing the numerical value of a and b, adjust the impedance operator of multiband aerial.
As shown in Figure 7, from main direction of looking, for the back side of substrate 201, taking the summit in its lower left corner as initial point, taking the straight line at the place, long limit on Zhong Guogai summit, this back side as transverse axis (U axle), taking the straight line at the minor face place on Zhong Guogai summit, this back side as the longitudinal axis (V axle), set up the rectangular coordinate system at substrate 201 back sides.In the rectangular coordinate system at this back side, the unit length of U axle and V axle is all 1mm.Each point in substrate 201 fronts, this coordinate in positive rectangular coordinate system, equals this upright projection to the coordinate figure in the rectangular coordinate system overleaf of the point behind the back side.
The minor matters of the L-type in parasitic radiation minor matters 205, its each summit coordinate in the rectangular coordinate system at the back side of substrate 201 is respectively (2,53), (2,48.9), (7,48.9), (7,52.1), (5.2,52.1), (5.2,53).
In fact, in the multiband aerial of the embodiment of the present invention, transmission line 221 in main radiator 203, Coplanar stripline structure 202, can be, integrated around radiation minor matters 204, parasitic radiation minor matters 205.
The material of substrate 201 can be epoxy resin; For example, FR4 epoxy resin, or dielectric constant is 4.4,, the loss tangent epoxy resin that is 0.025.
Main radiator 203, Coplanar stripline structure 202, can be Copper Foil around the material of radiation minor matters 204, parasitic radiation minor matters 205.
The multiband aerial entirety of the embodiment of the present invention is cuboid, the long 54mm of this multiband aerial, wide 53mm, thick 1.6mm.This multiband aerial can be applied to mobile device, for example: smart mobile phone, panel computer, notebook computer etc.
The emulation of the return loss of the multiband aerial of the embodiment of the present invention and measurement curve synoptic diagram are as shown in Figure 8; Transverse axis in Fig. 8 represents frequency, and the unit of frequency is Ghz; The longitudinal axis in Fig. 8 represents return loss, and the unit of return loss is dB.The simulation curve of the return loss of the multiband aerial of the embodiment of the present invention is comparatively identical with measurement curve.Multiband aerial is at the be all less than-10dB of return loss of the first frequency range, the second frequency range and the 3rd frequency range.
The greatest irradiation gain measurement value curve synoptic diagram of each frequency range of the multiband aerial of the embodiment of the present invention as shown in Figure 9; Transverse axis in Fig. 9 represents frequency, and the unit of frequency is Ghz; The longitudinal axis in Fig. 9 represents radiation gain, and the unit of radiation gain is dBi.The multiband aerial of the embodiment of the present invention has higher gain in the first frequency range, the second frequency range and the 3rd frequency range; Wherein, under 2.8Ghz frequency, the radiation gain measured value of multiband aerial can reach 4.75dBi.
Figure 10, Figure 11 be respectively the embodiment of the present invention multiband aerial just, the three-dimensional perspective schematic diagram at the back side.
In the technical scheme of the embodiment of the present invention, by optimizing the shape and size of main radiator in multiband aerial, increase and arrange around radiation minor matters, make multiband aerial can resonance in 1.75-4.2Ghz frequency range, make the single multiband aerial can be on the basis of frequency range of supporting LTE, WiMAX, WLAN, support the frequency range of frequency lower than 2Ghz, the frequency range of for example GSM.
And, in this multiband aerial, also optimized around the spacing between the spacing between each minor matters, minor matters and main radiator in radiation minor matters, make this multiband aerial can resonance in 1.39-1.48Ghz frequency range, thereby can support the frequency range of DAB.
Further, in this multiband aerial, be also provided with parasitic radiation minor matters, make this multistage antenna can resonance in 5.1-6Ghz, further widened the frequency range that this multiband aerial is supported.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a multiband aerial, comprises substrate, is layed in the positive Coplanar stripline structure of described substrate; It is characterized in that, also comprise:
Be layed in the positive main radiator of described substrate, it comprises that being shaped as the upper right corner offers the first radiant section of the rectangle of anti-L-type groove, and is positioned at the first radiant section lower end and is shaped as the second radiant section of inverted trapezoidal; Wherein, the lower end of the second radiant section is connected with described Coplanar stripline structure;
Around radiation minor matters, comprise the first radiation minor matters that the right edge from the bottom righthand side of the first radiant section to described substrate extends, the second radiation minor matters of extending to the limit, left side of described substrate from the left upper end of described the first radiant section, and one end be connected with the first radiation minor matters and along the right edge of described substrate upwards extend, along the upper side edge of described substrate extend left, along the limit, left side of described substrate to the 3rd radiation minor matters downward-extension, that the other end is connected with the second radiation minor matters.
2. multiband aerial as claimed in claim 1, is characterized in that, also comprises:
Parasitic radiation minor matters, its from described the 3rd radiation minor matters, extend to the upper side edge of described substrate along the limit, left side of described substrate to the minor matters of downward-extension, and the back side that extends to described substrate is L-type.
3. multiband aerial as claimed in claim 1, it is characterized in that, described Coplanar stripline structure specifically comprises: one end is connected with the lower end of the second radiant section, the other end extends to the banded transmission line of the lower side of described substrate, and is shaped as the first ground plane that the upper right corner offers the rectangle of right-angled triangle otch, is shaped as the upper left corner and offers the second ground plane of the rectangle of right-angled triangle otch;
The first ground plane, the second ground plane divide and are positioned at described transmission line left side, right side, and are all separated with described transmission line.
4. the multiband aerial as described in as arbitrary in claim 1-3, is characterized in that, the limit, left side of the first radiant section, the length of lower side are respectively 24.93mm, 33.75mm;
Anti-L-type groove in the first radiant section comprises: vertical slot and translot;
The length and width of described vertical slot is respectively 19.5mm, 5mm; The length of described translot is 5-11.5mm, and wide is 5-10mm; And
The wide of the first radiation minor matters is 1-4mm.
5. multiband aerial as claimed in claim 4, is characterized in that, described substrate is rectangle;
The limit, left side along described substrate in the 3rd radiation minor matters is to the minor matters of downward-extension, and spacing distance between the limit, left side of the first radiant section is 4.925mm;
Minor matters that the upper side edge along described substrate in the 3rd radiation minor matters extends left, and spacing distance between the second radiation minor matters is 3.6-18.6mm, and spacing distance between the upper side edge of the first radiant section is 0.42-15.42mm;
The width of the second radiation minor matters and the 3rd radiation minor matters is all 1-4mm; The minor matters of extending left along the upper side edge of described substrate in the 3rd radiation minor matters, along the limit, left side of described substrate to the minor matters of downward-extension, and the length sum of the second radiation minor matters is 59.8-74.8mm.
6. as the multiband aerial of claim 2-3,5 as described in arbitrary, it is characterized in that, the minor matters of L-type described in described parasitic radiation minor matters, specifically comprise: the minor matters along the right edge at the back side of described substrate to downward-extension, and the minor matters of extending left along the upper side edge at the back side of described substrate;
In the minor matters of described L-type, the width of the minor matters of extending left along the right edge at the back side of described substrate to the minor matters of downward-extension, with the upper side edge at the back side along described substrate is all 1-4mm;
In the minor matters of described L-type, the length sum of the minor matters of extending left along the right edge at the back side of described substrate to the minor matters of downward-extension, with the upper side edge at the back side along described substrate is 6.9-12mm.
7. as the multiband aerial of claim 3,5 as described in arbitrary, it is characterized in that, the wide of described transmission line is 3.25mm; And
Spacing distance between the right edge of the first ground plane and described transmission line is 0.4mm; Spacing distance between limit, left side and the described transmission line of the second ground plane is 0.4mm.
8. as the multiband aerial of claim 2-3,5 as described in arbitrary, it is characterized in that, described main radiator, is integrated around radiation minor matters and parasitic radiation minor matters.
9. as the multiband aerial of claim 1-3,5 as described in arbitrary, it is characterized in that the material of the described substrate epoxy resin that specifically dielectric constant is 4.4, loss tangent is 0.025; And
Described main radiator, described Coplanar stripline structure and the material around radiation minor matters are all specifically Copper Foils; And
The material of described parasitic radiation minor matters is all specifically Copper Foil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410284099.2A CN104022343B (en) | 2014-06-23 | 2014-06-23 | Multiband aerial |
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| CN201410284099.2A CN104022343B (en) | 2014-06-23 | 2014-06-23 | Multiband aerial |
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| CN104022343B CN104022343B (en) | 2016-05-18 |
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| CN107732459A (en) * | 2017-08-16 | 2018-02-23 | 电子科技大学 | A kind of miniaturization paster antenna |
| CN108682958A (en) * | 2018-05-18 | 2018-10-19 | 中国计量大学 | A kind of antenna for mobile phone of narrow frame |
| CN109659689A (en) * | 2019-01-28 | 2019-04-19 | 上海电力学院 | A kind of four frequency channel microstrip antennas for the detection of partial-discharge ultrahigh-frequency method |
| CN112038772A (en) * | 2020-07-28 | 2020-12-04 | 珠海格力电器股份有限公司 | Multi-frequency antenna and communication equipment |
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| EP1564842A1 (en) * | 2004-02-17 | 2005-08-17 | France Telecom | Ultrawideband antenna |
| CN202134653U (en) * | 2011-04-15 | 2012-02-01 | 哈尔滨工程大学 | Miniaturized wideband antenna |
| CN103474767A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院长春光学精密机械与物理研究所 | Four-frequency plane microstrip antenna with miniaturized microwave absorption structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1564842A1 (en) * | 2004-02-17 | 2005-08-17 | France Telecom | Ultrawideband antenna |
| CN202134653U (en) * | 2011-04-15 | 2012-02-01 | 哈尔滨工程大学 | Miniaturized wideband antenna |
| CN103474767A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院长春光学精密机械与物理研究所 | Four-frequency plane microstrip antenna with miniaturized microwave absorption structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107732459A (en) * | 2017-08-16 | 2018-02-23 | 电子科技大学 | A kind of miniaturization paster antenna |
| CN108682958A (en) * | 2018-05-18 | 2018-10-19 | 中国计量大学 | A kind of antenna for mobile phone of narrow frame |
| CN109659689A (en) * | 2019-01-28 | 2019-04-19 | 上海电力学院 | A kind of four frequency channel microstrip antennas for the detection of partial-discharge ultrahigh-frequency method |
| CN112038772A (en) * | 2020-07-28 | 2020-12-04 | 珠海格力电器股份有限公司 | Multi-frequency antenna and communication equipment |
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|---|---|
| CN104022343B (en) | 2016-05-18 |
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