GB2527638A - Bypass path loss reduction - Google Patents

Abstract

A radio frequency (RF) apparatus or method comprises switching 110, 120 and a bypass path 130 including inductive insertion loss reducing means L1, L2, L3. The bypass path 130 is located between first and second switches 110, 120, where each of the said switches 110, 120 has at least two throws. The inductive means L1, L2, L3 may be an inductor arranged to compensate for a capacitance introduced by at least one of an off state capacitance of the first and/or second switches 110, 120 and/or the capacitance of a transmission line portion of the bypass path 130. The first switch 110 may be coupled between a first inductor L1 and the bypass path 130 and the second switch 120 may be coupled between a second inductor L3 and the bypass path 130, whilst a third inductor L2 may be included. The first, second and third inductors L1, L2, L3 may be configured to compensate for the first switch off capacitance, the second switch off capacitance and bypass path capacitance, respectively. The inductors may be tuneable shunt arrangements. The bypass path 130 may be used in transmission or receiving modes of operation and connected to one or more antennas possibly including a diversity antenna arrangement.

Description

BYPASS PATH LOSS REDUCTION

BACKGROUND

Technical field

[0001] This disclosure relates to electronic systems and, in particular, to radio frequency (pj:) electronics.

Descnption of the Related technology [0002] A radio frequency (RF) system can include antennas for receiving and/or transmitting RF signals. There can be several components in an RF system that may access the antennas. For example, an RE system can include different transmit and/or receive paths associated with different frequency bands, different communication standards and/or different power modes, and each path may access a particular antenna at certain instances in time.

[0003] An antenna switch module can be used to electrically connect an antenna to a particular transmit or receive path of the RF system, thereby allowing multiple components to acccss the antennas. In certain configurations, an antenna switch module is in communication with a diversity module, which processes signals received and/or transmitted using one or more diversity antennas. The diversity Tnodule can include a bypass path that bypast tnt receie path and'oi transmit path processing of signals in the dnersity module

SUMMARY OF CERTAIN INVENTIVE ASPECTS

[00041 The invention defined by the independent claims, to which reference should be made.

[00051 The innovations described in the claims each have several aspects, no single one of which is solely responsible for its desirable attributes, Without limiting the scope of the claims, some prominent features wifl now he briefly described.

100061 One aspect of this disclosure is an apparatus that includes, a first switch ha%ing at least two thros, a seond sw1tch having at east two throws, a bypass path electrically connecting the first switch and the second switch, and at least one inductor -1 -configured to compensate for a capacitance associated with the bypass path to cause insertion loss of the bypass path to be reduced.

100071 The at least one inductor can compensation for at least one of an off state capacitance of the first switch, an off state capacitance of the second switch, or a capacitance of a tiarsmission linc ot the bypass path 100081 The at least one inductor can include a first inductor configured to compensate for an off state capacitance of the first switch, The off state capacitance of the first switch can include an off state scries capacitance and an off state shunt capacitance. The first switch can be coupled between the first inductor and the bypass path. The at least one inductor can also include a second inductor configured to compensate for an off atate capacitance of the second switch. The at least one inductor can also include a third inductor configured to compensate thr a capacitance of a transmission line of the bypass path.

[00091 The apparatus can also include a radio frequency signal path electrically coupled between the first switch and the second switch, in which the radio frequency signal path configurcd to proess a radio fiequeny signal flu first swtch can he configured to electrically connect an antenna port to the bypass path and electrically isolate the antenna port from the radio frequency signal path in a first state, and the first switch can be configured to electrically connect the antenna port to the radio frequency signal path and electrically isolate the antenna port from the bypass path. in a second state. The radio frequency signal path can be a. receive path. The radio frequency signal path can be a transmit path.

100101 l'he apparatus can include a diversity module, The diversit module can include at least the first sw flci, the secoid switch and thc bypass pa h Fht. dtversity module can also include the at least one inductor. The apparatus can further include a plurality of antennas, in which the plurality of antennas includes a diversity antenna in communication with. the first switch of' the diversity module. The apparatus can further include an antenna switch module in communication with the second switch.

[00111 Another aspect of this disclosure is an apparatus that includes a first switch having at least two throws, a. second switch having at least two throws, a radio fiequency signal path, a bypass path, COUI an inductor The radio frLqcncy signal path is electrically coupled between the first switch and the second switch. The radio frequency signal path is configured to process a radio frequency signal. The bypass path is electricafly coupled between the first switch and the second switch. The inductor is configured to compensate for an off state capacitance of the first switch to cause insertion loss associaLed with the bypass path to be reduced.

100121 The apparatus can further include a second inductor configured to compensate fbr an off state capacitance of the second switch to cause insertion loss associated with the bypass path to be rcduced, The apparatus can further include a third mductoi configuied to compensate for a capacitance of the bypass path to uausc inscruon loss associated with the bypass path to be reduced.

[00131 The inductor can have a tunable inductance, The inductor can be configured as a shunt inductor. The first switch can he coupler! between the inductor and the bypass path.

100141 The apparatus can further include receive paths between the first switch and the second switch, in which the receive paths include the radio frequency signal path.

The first switch can be configured to elcctricafly connect an antenna port to the bypass path and electrically isolate the antenna port from the receive paths in a first state. The fIrst switch can he configured to electrically connect the antenna port to a selected one of the receive paths and esectrically soiate the bypass path from the antenna port and other rcceive paths of the receive paths in a second state.

10015! Anothet aspekt of' this disciosute is an ekctronically-innlemcnted method of reducing insertion loss associated with a bypass path. The method includes operating a diversit-y module in a bypass mode such that an input of the diversity module is coupled to an output of the diversity module by way of a bypass path that electrically connects a first switch having at least two throws with a second switch having at least two throws. The method also includes, while operating the diversity module in the bypass mode, substantially canceling capacitance associated with the bypass patti to cause insertion loss associated with the bypass mode to be reduced.

100161 Another apect of thts disclosure is an appara us that includes a bypass pati, a teceive pnh, and n least ore uductor The hypas path electrically coinects a first switch coupled to an antenna port with a second switch coupled to an antenna switch module, in which the first switch having at least two throws, and the second switch having at least two throws ftc recent. path is elcctrually coLpled jetween tie fist switch with the second switch.. f he receive path includes a filter and a low noise amplifier. The at least one inductor is configured to compensate for capacitance associated with at least one of an off state of the first switch, an off state of the second switch, or a transmission line of the bypass path.

[0017] Another aspects of this disclosure is an apparatus that includes a first switch having at least two throws, a second switch having at least two throws, a receive path.

Ccctnccjly connecting the first switch and the second switch, a bypass path electiclly connecting the first switch an.d the searnd switch, a first inductor, a second inductor, and a third inductor The first inductoi Is configui ed to conipensatc for an of! state capacitance of the first switch to cause insertion loss associate with the bypass path to he reduced, The sceond inductor is configured to compensate for a capacitance of a transmission line of the bypass path o caase the inscrion los', assec ate with the bypass path to be icduced The third inductor is configured to compensate for an off state capacitance of the second switch to cause the nertion loss associate with the bypass path La be reduced 100i8j Another aspect of this discosure is an apparalus thai includes a transmission line and at least one inductor. The transmission line electrically connects a first multi-throw switch with a second multi-throw switch. The at least one inductor is configured to compensate tbr a capacitance associated with the transmission line to cause insertion loss oltbc transnussion hne to he ieducd 100191 The at least one inductor can compensate for capacitance ol at least on.e of an off state capacitance of the first multi-throw switch, an off state capacitance of the second multi-throw switch, or a capacitance of the transmission line to cause insertion loss of the transmission line to he reduced.

[0020J Another aspcct of this disclosure is an apparatus that includes a transmission line electrically connecting a first multi-throw switch and a second multi-throw switch and at least one inductor configured to compensate fbr an off state capacitance of the tiist nultl-tho%\ sitch and an oIl state capacitance of the seco'td multi-thro switch 10021] For purposes of summanmg the d!sclocurc, certain cspects acantages and novel features of the inventions have been described herein. it is to he understood that "4%, not necessarily all such advantages may be achieved in accordance with any particular embodiment of the invention. ihus the inventions may be embodied or canied oui in a maimer that achieves or optimizes one advantage or group of advantages as taught herein without necessarily achieving other advantages as may be taught or suggested herein.

BRIEF DESCRIPTION OF THE DRAWINGS

10022] Embodiments of this disclosure will now be described, by way of non-limiting example, with reference to the accompanying drawings, in which: [0023J Figure 1 is a schematic diagram of a diversity module according to an embodiment [0024J Figure 2A is a schematic block diagram of a diversity module according to another embodiment; (0025 Figure 2:8 is a schematic block diagram of a diversity module according to another embodiment; [0026! Figure 2C is a schematic block diagram of a diversity module according to another embodiment: [00271 Figure 3 is a schematic diagram of the diversity module of Figure 2A with parasitics illustrated; 10028j Figure 4 is a schematic diagram of illustrating parasitics of a hspass path in the diversity module of Figure 2A; 100291 Figure 5 is a giaph comparing insertion loss in the diversity module of Figure 2A with a previous diversity module; [0030] Figure 6 is a schematic block diagram of a wireless device that includes a diversity module,

DEIAILED DESCRIPTION OF CERTAIN EM.Bc)DIM*:ENTs

100311 The following detaUed description of certain embodiments presents various descriptions of specific emhodimen!.s. However, the innovations described herein can he embodied in a multitude of dillcrcnL ways, for example, a dfi cd and coered by the claims. In this description, reference is made to the drawings where like reference numerals can indicate identical or functionally similar elements. It will he understood that elements illustiated in the figures arc lot necssaiily drari to c..ale Moreo%ei, it will be understood that embodiments can inchide more elements than illustrated in a particular drawing and/or a subset of the illustrated elements.

100321 Somc wireless devices, such as handsets can include a phiratty of antennas including at least a primary antenna and a diversity antenna. Wireless devices configuied to receive and/or transmit signals in aecoreanee with the Long lu-ni ivoluLon (i:,Tfl standard assume that a device includes at least two receive antennas. With multiple antennas, signals can he received at more than one physical location. To improve reception, signak horn rnLitiple antennas at different physical octions can he comb ned In certain configutations the pnm icy antenni can be located phys. ally ciose to a wee e chip set and the diversity antenna can be located spaced apart from the primary antenna for physical diversity. With the diversity antenna being located relatively far from the receive chip set, signals received at the diversity antenna can experience loss through cable anth'or other wiring connecting the diversity antenna to the receive chip set. in some instances, such a cable can resul.t in a loss of about 2 decibels 1dB).

103I It can be desirable for signals associated with the diversity antenna to have approximately the same signal strength as signals associated with the primary antenna.

Accordingly, a diversity module can provide a gain to compensate for losses on signals received by the diversity antenna, such as losses front cables or other wiring. The diversity module can include one or more receive paths that each inelwles a filter and a low noise amplifier. For instance, the diversity module can include a plurality of receive paths that each include a band pass filter configured to pass a different frequency band and a low noise amplifier configured to amplify an output of a respective band pass filter.

OU34 The diversity module can also include a bypass path that avoids processing, such as filtering and amplification, of a signal associated with the diversity antenna, The bypass path can function as a transmission line that avoids the filtering and amplification of the one or more receive paths of the diversity module. For instance, when a signal received from the diversity antenna is outside of a pass band of a filter of any of the one or more receive paths (for example, outside of a pass band of a band pass filter of any of "4' the one or more receive paths), it can be desirable to bypass the one or more receive paths with the bypass path. The bypass pati can provide a signal received from the diversity antenna to an antenna switch module without filtering and/or adding a gain. The antenna switch mactitle can then process signals associated with the diversity antenna and provide the processed signals to a receiver and/or a transceiver. In some applications, the bypass path can be used to transmit signals using the diversity antenna. hi such applications, an antenna switch module can provide an Rh signal to the diversity module to transmit from the diversity antenna by way of the bypass path.

L00351 In a diversity module, it can be desirable for a bypass path to have as low of an rnsertion loss as possible over a relatively wide frequency range (e.g., a frequency range spanning seera1 GUi or a frcqucncy lange spannrg it least about 10 (1Hz) Wita a relatively low insertion [ass, the bypass path can provide a low loss receive path and/or a low loss transmit path.

[00361 Capacitances in the diversity module can result in insertion loss in a bypass path Suh capacitances can result trom capacitive loa&hng of the ransnllssion hrc of the bypass path and/or of one or more switches of the divershy module. For instance, a multi-throw switch can couple an RF signal to a bypass path. In this example, off slate capacitances associated with throws that are unconnected to the bypass path. can create undesirable capacitance in the bypass path. [he capacitance associated with one or more switches and1oi the transmtssion l'nc of the bypass path can bc significant and can result in increased insertion loss. This increased insertion loss can have a more pronounced effect at highcr operatcg frequences For instancc, abscnt compensation parasitic capacitance associated with one or more switches and/or the transmission line of the bypass path can significantly affect insertion loss at frequency of at least about 2 (TiFIz in certain applications.

37I Aspects of this disclosure relate to compensating for capacitances that can cause insertion loss in. a bypass path, such as a bypass path in a diversity module. One or more inductors can compensate fbr some or all of the capacitance that causes insertion loss in the bypass path Accordingly, the one or more inductors can reduce msertron loss of the bypass path. Such compensation can be present over a relatively wide frequency range, such as a frequency range of several to tens of GUi.. In one embodiment, a bypass path electrically connects a first switch with a second switch, a first inductor can substantially cancel ith off state capac1t4n.c. o the uimt itch a second inductor can substan.ially ecncei a apecitanc& of the bypass path, and a third inductor can substantially cancel an off state capacitance of the second switch.

[0038] With the one or more inductors to compensate fhr capacitance that can cause insertion loss on the bypass path, the length of the transmission line in the bypass path can contribute relatively less to insertion loss. Accor'Jingy, such a transmission line can have a longer iength without significantly impactirg insertion less of the bypass path clue to compensation by the one or more inductors, Alternatively or additionally, switch size of the first switch and'or the second swi ch tiat are connected y the bypass path can hae less of an effect on insertion loss compared. to previous designs due to inductive compensation for the off state switch capacitances.

[0039] While this disclosure may describe examples in diversity modules of vireless devices for illustrative puiposts, die pnncipes and advantages described herein my be applied to other swtabh. applicat otis Moreover, while feattrcs of thts disclosure may e described with reference to receiving RE signals for illustrative pumposes, any of the principles and advantages discussed herein can be applied in connection with a circuit configured to trarstmt RF signals, a circuit configwed to rcccne RF sanals and'o a circuit configured to both transmit and receive RF siais, For instance, the principles and advantages discussed herein cai.r he applied to any context where there is a bypass path electrically between two multi-throw switches and also a radio frequency signal path electrically coupled between the two multi-throw switches, in which the radio frequency signal path cat process a radio frequency signal for rtccn mg or transnutting [0040 Figure 1 is a schematic diagram of a diversity module 100 according to an embodiment The cn'crsity module 1 00 and'or any of the diversity modiJes reerenced h.erei.n can be implemented in a wireless device, such as a mobile device, for example. For instance, the diversity module 100 cart he implemented in a smart phone. The diversity module 100 anctor any of the other diversity modules can mclude morc or ftwer elen'cnts than illustrated. The diversity module 00 can receive an RF signal from a diversity antenna and provide a processed version of the received RF signal to a receive port. in some ulstances, the diversity module 100 can also be used to transmit an RF signal using the diversity antenna. The illustrated diversity module 100 includes a first switch 110, a second switch 120, a bypass path 130, and receive paths 135.

100411 The first switch 110 can he an RE switch configured to pass RE signals from an antenna port to the bypass path 130 or to a selected one o4 the receive paths 135 The first switch 110 can be bidirectional such that the first switch 110 can also provide a signal from the bypass path 130 to the antenna port. The first switch 110 can he considered an mput switch ioi recenmg signas fro xi the antenna port When the first switch 110 s bidirectional, it can he considered art output switch for facilitating transmission of a signal Iron the antenna port While teatures of tins disclosure may be described with referencc to ant antenna port for flustratise purposes, any of the prrnciples and advantages discussed herein can be applied in connection with multiple antenna ports andior multiple diversity antennas. One or more of the inductors Li, L2, or L3 can be implemented separately in connectioli itn each of a plurahty of arnennas andki antenna ports for rnst&tec. in certain applicatrons. one fist inductor 11 can he miplemerted in cor'nution with a first antenna and another first inductor LI can he implemented in connection with a second antenna. One or more of the inductors Li, L2, or L3 can he imp'emented to provide inductive compensation associated with a plunhry of antennas andlor antenna ports As one e'aniple, one third inductor 1:3 can be implemented in connection with multiple antennas.

[0042] in one sate, the firs swuch 10 eteetucal1y coup1es the aitenna port to the bypass path 130 and electrically isolates the antenna port from receive paths 135. Such a state corresponds to a bypass mode. in other states, the first switch 110 electrically couples the antenna port to a selected one of C e receive paths 135 and ercerically isolates the other receive paths 135 and bypass path 130 front the antenna port.

[00431 The f st s' itch 110 can include a shunt element and a swiLh element associated with each throw. To selectively electrically couple a signal associated with a selected throw to the antenna port, the first switch 110 can turn on the switch element associated with the selected throw turi off the shunt elemcn associated with the selected throw, tarn on the shunt elements associated with the other throws, and urn off the switch ciemcnt assrtated with the other throws 1 he shunt clement and ne switch clement can -.9..

each be implemented by one or more field effect transistors, for example. In some ImpLementatLons thc shunt clemcnt can be implemented by two 01 more field effect transistors in series with each other andIor the series element can he implemented by two or more field effect transistors in series with each other.

100441 Ihe ilustrated first switch 10 is a multi throw switch The first swth can include two or more throws. For instance, the illustrated first switch 110 includes four throws. The first switch 110 can have any suitable number of' throws that is 2 or greater tor a pat teular application The first switch 110 car havc a single pole In some other embodiments (not illustrated), the first switch 110 can have two or more poles.

100451 The second switch 120 can he an RF switch configured to pass RE signals from the bypass path 130 or a selected one of the receive paths 135 to the receive port. The second switch 120 can be bidirectional such that the second switch 120 can also provide an Rh signal to the bypass path 130 to facilitate transmission of the RE signal from the antenna port. The RF signal can be received at the receive port, in which case the reive port can operate a a transnit port in a t'ansnvt niodt of operaQon. ot another port Fot instance, the RE signal can be provided to the receive port by an antenna switch module fbi transmission via a diversity antenna electrically connected to the first switch 110. In another implementation (not illustrated), the second switch 120 can include a first pole associated with receiving and a second pole associated with transmitting such that either a receive iiofl or a trr.sinit port can be electrically tonnectcd to the bypass path 130 the second switch can be considered an output switch for receiving signals fmrn th.e antenna port. When the second switch 120 is bidirectional, it can he considered an input switch lbr theilitating transmission from the antenna port.

10046! in a state conesponding to a bypass mode, the second switch 120 clectncally coupes the receive port to th bypass path 130 and electrically isolates the eceie port from the receive paths 135. In other states, the second switch 120 electrically couples the receive port to a selected one of the receive paths 135 and elecincally isolaes the other receive paths 135 and bypass path 130 front the receive port.

100471 The second switch 120 can include a shunt element and a switch element associated with each throw. To selectively electrically couple a signal associated with a *-10*-selected throw to the receive port, the second switch 120 can turn on the switch element aqsoc1ated with the selected throw, turn off the shunt elemtnt assouated wait the selected throw, turn on the shunt elements associated with the other throws, and turn off the switch elements associated with the other throws. The shunt element and the switch clement can each he irrpiernented hy tire oi more field effect tranisiors, for example In son'e implementations, the shunt element can be implemented by two or more field effect transistors in series with each other and/or the series element can be implemented by two or more field eflèet transistors in series with each other.

100481 The ilk scrted second switch 120 is a multi4hrow swath I he second switch 120 can include two or more throws Fo' instane, the illustrated seond switch 20 includes four throws. The second switch 120 can have any suitable number of throws that. is 2 or greater for a particalar application The secord switch 120 can have a single pole In some other embodiments (not illustrated), the second switch 120 can have two or more poles.

The second switch 120 can have a different number of poles and/or throws than the first switch 110 in certain applications.

100491 The bypass path 130 can avoid filtering and amplification of a signal associated with the diversity antenna. The bypass path 130 can function as a transmission line between the first switch 1.10 and the second switch 120 that bypasses the receive paths 135. Accordingly, a signal can be passed by way of t1e bypass path 130 from the antenna port to the receive port (or from the receive port to the antenna port) without being processed by any of the receive paths 135.

[00501 One or more inductive circuit elements can be included in the diversity module 100 to cause insertion loss associated with the bypass path 130 to he reduced. While the diversity module 100 and the other diversity modules disclosed herein include three such nductois Li, L2, and LI, onc or more of these mcuctois can hc included it' certam embodiments, Moreover, one or more of the inductors Li, 12. or L3 carl he tunable such that the inductance of one or n'ore of the knductors Li, L2 or 1 3 can he adjusted I or example any of these mdu4ois can i elide a base inductor nh one or inure additional inductors that can be switched in or switch out in parallel with the base inductor to change the effective inductance of the inductor, (0051 In Figure 1, the illustrated flrst inductor LI has a first end coupled to the bypass path 130 and a second end coupled to a ground potential. Accordingly, in Figure 1, the first inductor LI is configured as a shunt inductor. The first switch 110 can be disposed between the first inductor LI and the antenna port. The first inductor Li can have an mductance selected to ompencate for sonic or all of the of f staR (apautance of the flIT swrch 110 rn bypass mock Aordngly, the lint inductor Li can substantrally caned effects of off state capacitance from the first switch 110 to reduce or substantially eliminate the effect of such capacitance on. insertion ass of the bypass path 130. Lm some embodiments, the first inductor Li can also compensate fbr at least a portion of the capacitance of a transmission linc ot the bypa%s path 130 100521 The illustrated second inductor L2 can be coupled in series in the bypass path 130 between the lint swiLli 110 and the second switeb 120 The second inductor L2 can have an inductance to compensate for parasitic capacitance of the transmission line of the bypass path 130. The second inductor L2 can substantially cancel effects of capacitance of the bypass path 130 to reduce or substantially eliminate the effOct of such capacitance on insertion loss of the bypass path 130. In some embodiments, the second inductor L2 can also compensate for at least a portion of the off state capacitance of the first switch 110 and/or at least a portion of the off state capacitance of the second switch 120.

The illustrated third, inductor L3 ha.s a first end coupled to the by'pass path and a second enc coupled to a ground potential As illustrated in Figure, the third inductor L3 is configured as a shunt inductor. The second switch 120 can he disposed between the third inductor L3 and the receive port. The third inductor L3 can have an inductance selected to compensate 11w some or a11 of the off state capacitance of the second switch 120 in bypass mode, Accordingly, the third inductor L3 can substantially cancel effects of oft stute kapacItant e front the second switch 120 to reduce or suhtantially eliminate the effect of such capacitance on insertion loss of the bypass path 130. In sonic embodiments, the third inductor 13 can also compensate tar at lca,t a portion of the capacitance of a transmission line of the bypass path 130.

1tft054 The receive paths 135 can filter and amplify a signal from the antenna port rd provide a filtered amplified signal to the reene port by way of tht ccond "utch 120 Each of the receive paths 135 can include a first matching circuit 140a'140h/140c, a band pass filter lSOa/lSOh/iSOc to filter a sign& received from the antenna port by way of the first switch 110, a second matching circuit lóOaJi6Oh/i.60c, and a low noise amplifier 1 70a/l 701,/17Cc to amplify an output from the hand pass filter 1 iOa/1 Sob/I SOc. The hand pass filter I SOa!1 SOb/I SOc of each of nxcive path can pass a difIèrent frequency band.

Alternatively or additionally, the hand pass filter I 50a/l Sob/i SOc of each of receive path can have different filler characteristics. such as out of band atenuation, etc. Although three diffrrent receive paths are illustrated in Figure 1, any suitable number of receive paths can be implemented. For instance, in certain applications, I to lO receive paths can be included in the diversity module.

[0055] V/nile the figures tilusti nc the ieccivc paths 135 and V-c bypass rath 130 between two multi throw switches any of thc-princ'ples and adanlages discussed in this disclosure can be apphed to other suitable contexts, such as (I) a bypass path 130 and a single receive path between multi--throw switches; (2) a bypass path 1 30 and one or more transmit paths between multi-throw switches; and 3) a bypass path 130, one or more receive paths and one or more transmit paths between niulti-*thmw switches.

[0056] Figure 2A is a schematic block diagram of a diversity module 2.00 according to another embodiment. The diversity module 200 of Figure 2A is substantially the same as the diversity module 100 of Figure 1, except that the first inductor Li and the third inductor L3 aic coupled to the nypass nab 130 at ditTeient nodes Accordirgiy other than the nodes atwhicI the first inductor LI and the third in inductor L3 are coupled, the dveisity moaulc 200 can imp,cment any of the pnnciples and adantages discassed tith Figurc I As one non-1md rig earnpie, he switches 110 and 120 n the illustratec. in F gure 2A can implement any combination of features discussed with reference to Figure 1. The first inductor LI of Figure 2A is coupled on an opposing side of the first switch 110 relative to the embodiment illustrated in Figure 1 and the third inductor L3 of Figure 2A is coupled on an opposing side of the second switch 120 relative to the embodiment illustrated in Figure I.. The first inductor LI and the third inductor 111 of Figure 2A are part of the diversity module 200 of Figure 2k n the illustrated diversity module 200, the first switch 110 is coupled between the first inductor Li and the bypass path 130. The inductance of the fIrst inductor LI can impact both the bypass path 130 and the receive paths 135 in the diversity module 20C, as opposed to inductance of the first inductor Li only having a substantial impact on the bypass path 130 in the diversity module 100. Additionally, in the illustrated dvezsiy module 200. the second itch 120 is coupled between the hypas pa'h I0 aid the third inductor 130. The inductance of the third inductor L3 can impact both the bypass path and the receive paths 135 in the diversity module 200, as opposed to inductance of the third inductor L% only having a substantial impact on the bypass path 130 in the diversity module 100, [0057] In anot tee emhodinient, ftc first inductor I I can he ananged 1 i accordance wt:h the diversJy modulc 130 a liustiated in Figure 1 and the third inductor 1 3 can be arranged in accordance with the diversity module 200 as illustrated in Figure 2A.

A1tematvely, thc fist tnductor Li an be arranged in accoidance with the diversity moduie as illustrated in Figure 2A and the third inductor L3 can be arranged in accordance with the diversity module 100 as illustrated in Figure 1..

j0058] According to other en'bodu ents, both the first rnductoi LI of Figure I and the first inductor Ii of Figure 2A can be implemented together such that these inductors have a net effect of substantially canceling off state capacitance of the first switch 11.0.

Alternatively or additionafly, both the third inductor L3 of Figure 1 and the third inductor L3 of Figure 2A can he implemented together such that these inductors have a net effect of substantially cancdnig off statt Lapacitance of the first wiLh 120 10059] One or more of the inductors LI, L2, or L3 can have a tunable impedance.

having a tunable impedance can enable one or more of the inductors Li, L2, or L3 to adjust their impedance to account fbr variations, such as process variations, in capacitance that can result in insertion loss associated with the bypass path 1.30. For instance, an inductor with an adjusable imptuance can onpensatuon for ariaLons in an off state apautance of the fist switch 110, variations in capacitance associated with the transmission line of the bypass path, %ariatlons in off state capacitance of the second switch Y'O, or any connmatuon the"eot Tp on.e embodiment, one or more of the inductors Li, 12, or L3 can be implemented with. a.

tunable capacitance in paralleL 100601 Figure 2B is a schematic block diagram of a diversity modifie 200' according to another embodiment the dverstty module 200' can 1 iiperncir any of the principles and advantages discussed with reference to the diversity module 200 and/or any suitable combination of features discussed with reference to the diversity module 100. The dwrsitv irodule 200' of figure 2B is ubstamially the same as fh dwersit module 200 of Figure 2A, except that the first inductor Li and the third inductor L3 are illustrated as being tunable inductors LI' and L3' in Figure 23. In another embodiment (not illustrated), the second inductor L2 can also he tunable.

10061 The first inductor Li and the third inductor L3 can each be implemented by any suitable tunable it ductanc-e cu,t it Ii' some otltr embodiments only one of the first inductor LI or the third inductor can he implemented by a suitable tunable independence ureuit As onc eA4mple, a tunable impedaec circuit an i -ic'ude a base inductor w,tF otw 0 more additional inductors that can be switched n ot switch ot t in series amber in parallel with the base inductor to change the effective inductance of the inductor. As another exar-'ple, a tunable impedance can mcludt one or more mductois ti at can be switched in or switch out in series and/or in parallel with each other.

[0062j In certain embodiments, tile tunable first inductor LI can include switches dtsposed ni eiies heteen respective indjctive elements and the antenna port One or trore of the inductive elements of the tunable first inductor Li can be selectively electrically coup'cd to the antenna port to provide a desired ellectiv impedance in such an embodiment, each inductive element of the first inductor Li can be electrically isolated from the antenna port in a decoupled state such that the effective inductance of the first inductor Li can be approxmately fete n the decoupled state Simi any in certain embodiments tl'e tunable third inductor [3 can include switches disposed in series between respective inductive e1cments and the receive port One or more of the inductive elements of the tunable Jurd inouctot Li can he seicuvel eleetncafly coupled to the recre port to provide a desired effective impedance. in such an embodiment, each inductive element of the third inductor L3 can be electrically isolated from the receive port iii a decoupled state such ti-tat the effective inductance of the third inductor L3 can he approximately zero in the decoupled state.

-1 5.- 0063i In various embodiments, the tunable first inductor LI can include a plural ty of inductive elements arranged m enes with each othu between the antenna port and a reference potential, such as ground. Each of the inductive elements can be arranged in pacallc1 with a respective switch \\+en a respective witch is turned on the.onesponding inductive element can he bypassed. The inductance of the first inductor LI can be tuned by selectively bypassing one or more inductive elements. Similarly, in certain embodiments, the tunable third inductor L3 can include a plurality of inductive elements arranged in series with each other between the receive port and a reference potential, such as ground. Each of the inductive elements cmi be arranged in parallel with a respective switch. When a respective switdil is umed ni thc corresponding inductive element can be bypassed The mducance of the thud Lidactor L3 can be tuned by selectively oypassmg one or mon. inductive elements [00641 One or more of the inductors LI, LI or L3 can be arranged in a variety of ways to compensate for capacitance associated with die bypass path. For example, the inductors Li and/or L3 can be implemented as shunt inductors as illustrated in figures 1, 2A, and/ni 2B or implemented as series inductors as illustrated in hzwe)C [00651 Figure 2C is a schematic block diagram of a diversity module 200" according to another embodiment, The diversity module 200" can implement any of the principles and advantages discussed with reference to the diversity module 200 and/or any suitable combination of features discussed with reference to the diversity module 100 and/or the diverslt3 module 200 The in Qersity module 200" ofFtgurc 2C. uhstantiaIly the same as the diversity module 200 of Figure 2A, except that the first inductor Li and the third inductor L3 are arranged as series inductors in Figure 2C instead of as shunt inductors as illustrated in Figure 2A. In Figure 2C, the first inductor LI is disposed in series between the antenna port and the first switch 110. Similarly, in Figure 2C, the third inductor L2 is disposed in series between the second switch 120 and the receive port. The inductance of the first inductor Li iii Figure 2C can he selected such that it substantially cancels on off state apautance of the first switch 110 The inductance ot the third inductor LI ot Figure 2C can be selected such that it substantally cancels on off tatc capacitance of te first switzh 120 [0966] in another embodiment, the first inductor Li can be arranged as a series inductor as illustrated in Figure 2C and the third inductor L3 can he arranged as a shunt inductor as illustrated in any one of Figures 1 to 2ff In another embodiment, the third inductor L3 can he arranged as a series inductor as illustrated in Figure 2C and tile first inductor LI can be arranged as a shunt inductor as illustrated in any one of Figures ito 28.

09671 Figure 3 is a schematic diagram of the diversity module 200 of Figure 2A with parasitics illustrated for a first state in which the antenna port is electrically connected to the bypass path 130 by the first switch 110 and the first switch 110 electrically isolates the antenna port from the receive paths 135. The first state can correspond to bypass mode of the diversity module 200. As illustrated in Figure 3, in the first slate, the first switch 110 can have a senes capacitance of C011 1SF VIES ror cach ol the hross that aie unconnected to the bypass path I 0 An off state capactancc of the first switch 110 nelude' the senes capacitances Co1 SFR1ES in addition, in the first state, the first switch 100 can have a shunt resistance RON1 SH[TNT for each of the throws that are unconnected to the bypass path 130. In the illustrated first switch 110. there are three such series capacitances COFFI SERIES and three shunt resistances RONI SHUNT in the first state.

[0068] Similarly, when the second switch 120 electrically connects the bypass path i30 to the receive port and electrically isolates the receive paths 135 from the receive port the second switch 120 can have a series capacitance of CoFI'2 SERJFS corresponding to each of the throws of the second switch 120 that are unconnected to the bypass path 130. An off s ate capacitance of the seLonu switch 0 includes the senes capacitanccs Corn srp rs In this state, the second switch 120 can also have shunt resistances 1 N2,$HUNr associated with each throw unconnected to the bypass path!J3Q, [00691 When a particular path of the first switch 110 is on, there can be a series resistance RoIgERrEs associated with the on path and a shunt capacitance CorEl 5HUNc associated with the particular path that is on. The off state capacitance of the first switch 110 an include the shunt apauance Cot' clprn, which is an off state capacitance associated with the on path of the first switch 110. In the first state, the first switch 110 can also have a scries rcsistance R0NI SERTh and a shunt capautance C0rp associated with the throw connected to the bypass path 130. Likewise, when the second switch 120 electrically connects the bypass path 130 to the receive port, the second switch can have a series resistance Ro1 sis and a shunt capacitance CoFF2 SHUNT associated with the throw passing a between the bypass path 130 and the receive port. The shunt capacitance Cou:j SHUNT can be considered part of the off state capacitance of the first switch 110. Similarly, the shunt capacitance COFFZ SHUNT can be considered part of the off state capacitance of the second switch 120.

10070] Figure 4 is a schematic diagram of illustrating parasitics of a bypass path iii bypass mode in the diversity module 200 of Figure 2A. In Figure 4, the total series off state capacitance of the first switch 110 for bypass mode is represented by the capacitor having a capacitance of Total Corn SPIUES The inductance of the first inductor LI can he selected to substantally cancel the total senes oJ tatt capacitance iota] SERlL of the first switch 110, [0071J As shown in Figure 4. the shunt off state capacitance of the first switch is represented by a capacitor having a capacitance of Corp1 SHUNT, the shunt off state capacitance of the second switch 120 is represented by a capacitor having a capacitance of C0jpn5[r[. and capacitances of the transmission line of the bypass path 13 on either side ot the second nductor L2 are repiesetec by c apacitor ha% rig a capacitance of C nb2 The second inductor 12 can substantially cancel the capacitance of the transmission line of the bypass path 130. As shown in Figure 4, the inductance of the seeond inductor L2 can he selected to also substantially cancel the shutit off state capacitance COFH 5HUN'r of the first switch 110 and th shunt of I sure capaLtarice COFFA H NI of hc second switch 120 In some other embodiments, the first inductor Li can compensate fbr some or all of the shun.t off state capscitancc Co ci t' o the first switch 110 andioi he third inductor Li can compensute for some or all of the shunt capacitance COrn SHUNT of the second switch 120.

10072 In Figure 4, the total series off state capacitance of the second switch 120 fot bypass mode is represented b the capacitor having a apaitance of total Col't[s Te inductance of the thud inductor Li can he selected to snbstanti?lly cancel lhc total senes off state capacitance Total C12 s of the second switch 1 0 [0073j With the first inductor Li. the second inductor L2, and the third inductor L3, the bypass path 130 can fimetion like the antenna port and the receive port arc connected by way of the on resistances of the first switch I I 0 and the second switch 120. This can result in a relatively low insertion loss For the bypass path 130. 1 8-

[007I In the embodiments of Figure 1, Figure 2B, Figure 2C the first inductor Ll, the second inductor L2, and the third inductor L3 can cancel the same capacitances associated with the bypass path i 30 in a similar manner. In one embodiment of Figure 1, the first inductor LI can have an inductance selected to substantially cancel both the off state series capacitance ?T*otal COFFISSIULS of the first switch 110 and the off state shunt capacitance Corn SHUNT of the first switch 110. The second inductor L2 of this embodiment can have an inductance selected to substantially cancel the capacitance of the transmission line of the bypass path 130 on both sides of the second inductor L2, which are illustrated as the capacitois h.n mg capacrtanc of Craa in Figure 4 Additionally ir this embodunen the third inductor 12 can have an inductance selected to substantially cancel both the otT state series capacitance I otai Cj P2 J 1SS of the second switch 120 and thc off stait shunt capacitance CorF2 smswr of the second switch 120.

Figure 5 is a graph comparing insertion loss in the diversity module 200 of Figure 2A with a corresponding diversity module without the first inductor LI., the second iroutor 12 and the third inductor 1 3 The curve 500 conc'ponds to the di%ersltv module and the curve 502 corresponds to the corresponding diversity module without inductive compensation. These curves show that the inductors the diversity module 200 improved insertion loss over a relatively wide frequency range. In generating these curves, a Q factor of 25 for the inductors LI, L2, and L3 was used.

[0076] Figure 6 is a schematic block diagram of a wireless device 611 that includes a diversity module 623 that any implement any combination of features of the divcrsiw module 100 of Figure 1 and/or the diversity module 200 of Figure 2A. The wireless device 611 is an example application for implementing the diversity modules described herein. ftc wireless device can be, fbr example, a smart phone, a tablet computer, a device that is conflgured to communicate in accordance with LTE and/or a communications standard that accounts for multiple antennas, a device that has an LTF module, or a device that is eontigured for wireless communication having multiple antennas.

100771 Referring to Figure 6, a schematic block diagram of one example of a wirelcss or mobile device 61! will he described. The mobile device 611 can include radio frequency (RF) modules implementing one or more features of the present disclosure. in -. l9-particular, the mobile device 611 includes a diversity module 623 that implement any suitable combination of features discussed above associated with decreasing insertion loss of a bypass path.

[0078] The example mobile device 61! depicted in Figure 6 can represent a muh-hand and'oi multi-mode device such as a nmlti-handtrnalb-niouc mobile phonc By way ot examples, Global System Jar Mobile GSM commumation standard is a mode of digital ceihilar communication that is utilized in many parts of the world, GSM mode mobile phones can operate at one or more of ibur frequency bands: 850 MHz (approximately 824-849 MHz for transmit, 869-894 MHz fbr receive), 900 MHz (approximately 880-915 MHz for transmit, 925-960 Ml-iz for receive), 1800 MHz (approximately 1710-1785 MHz for trarsrnit, 805-l380 MHz for receive), and 1Q00 Mlii (approx mattl) 1850-19th MUT for transmit, 1930-1990 MHz for receive). Variations and/or regional/national implementations of the GSM bands are also utilized in different parts of the world.

0079 Code division multiple access (CDMA) is another standard that can be implemented in mobile phone dtvices In certain Anpiements ions, (DMA devees uan operate in one or more of 800 MHz, 900 MHz, 1800 MHz and 1900 MHz bands, while certain W-cDMA and Long Term Evolution (LTE) devices can operale over, thr example, 22 or more radio frequency spectrum bands.

[00801 RF modules of the present disclosure can be used within a mobile device implementing the foregoing example modes andlor hands, and in other communication standards. For example, 30, 40, LTE, and Advanced LTE are non-limiting examples of such standards.

008fl In certain embodiments, the mobile device 611 can include an antenna switch module 612, a nansceivel 613 one or mere puinary antemias 614, power amplifiers 617, a contol compnnt 618, a computer readable medium 619, a processot 620 a battery 621, one or more diversity antennas 622, and a diversity module 623. The diversity module can implement any combination of features of the diversity modules discussed herein include the diversity module 100 and/or the diversity module 200.

[0082] The tiansceiver 613 can genetate RF signals for trcmsmision ia the primary antenna(s) 614 and/or the diversity antenna(s) 622. Furthermore, the transceiver 613 can receive incoming RF signals from the primary antenna(s) and/or the diversity antenna(s) 622. it will be understood that various function.alities associated with transmitting and receiving of RF signals can be achieved by one or more components that are collectiveiy represented in Figure 6 as the transceiver 613. For example, a single component can he configured to provide both transmitting and receiving thnctionahties In another example, transnitttiig and receiving flinctionalities can be provided by separate components.

[0083] In Figure 6, one or more output signals from the transceiver 613 are depicted a being prosided to the antcnna switch module 612 -a cite or more UansrnNsion paths 615 In the exarple showi, differert trrrisnussion pairs 615 can represunt output paths associated with different bands and/or different power outputs. For instance, the two different paths shown can represent paths associated with different power outputs (eg, low power output and high power output), andior paths associated with different bands. The transmit paths 615 can include one or more power amplifiers 617 to aid in boosting a RF signal having a relatively low power to a higher power suitable for transmission. Although Figure 6 illustrates a configuration using two transmission paths 615, the mobile device 611 can be adapted to include more or fewer transmission paths 615.

f0084 In Figure 6, one or more received signals are depicted as being provided from the antenna switch module 612 to the transceiver 613 via one or more receiving paths 61o In il-ic examp e shown ditferent receisnig paths 616 can represtnt paths as'ouated itoth ditte-ent bands For example, the four cxampL,aths Olo shown can represent quad band capability that some mobile devices are provided with. Although Figure 6 illustrates a configuration using four receiving paths 616, thc mobile device 611 can be adapted to include more or fewer receiving path.s 616.

[0085] To facilitate switching between receive and/or transmit paths, the antenna switch module 612 can e ic1t ded and can be used electncall) connect particola antenna to a selected transmit or receive path. Thus, the antenna switch module 612 can provide a iumber of swiching flinctlnnallties assoc ated with an operaton of the mobile dexiuc 611 The antenna switch module 612 can include one or more mu1tithrow switches configured to provide furictionalities associated with, for example. switching between different bands, switching between different power modes, switching between transmission and receiving modes, or some combination thereof The antenna switch module 612 can also be configured to provide additional functionality, including filtering and/or duplexing of signals.

100861 Figum 6 illustrates that in certain embodiments, the control component 618 can he provided for controlling various control functionalities associated with operations of the antenna switch module 612, the diversity module 623. and/or other operating component(s). For example, the control component 618 can provide control signals to the antenna switch module 612 and/or the diversity module 623 to control electrical connectivity to the pnn'aiy at tenna(s) 614 and'or diwrsity antenna(s 622 [0087] In certain embndlm2nts. the processor 620 can bt configurd Lo facilitate implementation or various processes on the mobile device 61. The processor 62() can be a gerieial purpose computer, spectal pwpose colt putei, or other piogiammable dita processing apparatus in eertLn irnpementations, the mobile device 611 can include a computer-readuthie memory 619, which can include coniputer program instructions that may be proided to and cxecutcu by the processor 620 [0088] ftc battery 621 can be any suitab1e battery for use in th mobile device 611, including, for example, a lithium-ion battery.

100891 The illustrated mobile device 611 includes the diversity antenna(s) 622, which can help improve the quality and reliability of a wireless link. For example, including thc diversity anteiua(sj 622 can nducc hre-of-sight losses and/or mitigate inc impats of phase shtft, ,ime dclays and/or distortions associated with siial intcrference of the primary antenna(s) 614.

As shown in Figure 6, the diversity module 623 is electrically connected to the diversity antenna(s) 622. The diversity module 623 can be used to process signals received and/or transmitted using the diversity antenna(s) 622. In certain configurations, the diversity module 623 can be used to pio-ide futermg, arnphfiat on, itching, and1 or othei processing. The diversity module 623 can include the bypass path 130. One of more of the inductors Li. [2, or L3 can also be included in the diversity module 623. The diversity module 623 can include the first switch 1. 10, the second switch 120, the bypass path 130, and one or more transmit and/or receive paths enclosed within a single package. One of more of the inductors LI, L2, or L3 can also be included within the single package.

100911 Some of the ethbodinwnts described above have provided examples in conneetton with dwervty modules iosever, the pincples and athanages discussed erem can be implemented in any other systems or apparatus that can benefit from inductive co npensation for a bypass path Suh a hpass path can nypass iecene author transmit paths.

[0092] Such a system or apparatus can be implemented in various electronic devices. Exampks of th.e electronic devices can include, but are not limited to, consumer electronic products, parts of the consumer electronic products, electronic test equipment, etc. Examples of ti-c elcetromc deies can also includt, hut ar not limucd c, Rb ntodales such as dneisuy modules and'or front end modue, memory chips Incmory modules circuits of opLical networks or other communication net%vorks, and disk driver circuits. The consumer dectronie aroduts can include, but arc not hmitcd to, a mobile phone such as a mart phone, a telephone a tulevision, a computer monitor a co'nputu, a hand-held ompute", a laptop eoniputcr, a tablet computer, a wearable computing device such as a smart watch, a personal digital assistant (PDA), a PC card, a microwave, a refrigerator, an automobile, a stereo system, a cassette recorder or player, a DVI') player, a CL) player, a \CR, an MP3 player, a radio, a camcorder, a camera, a digital camera, a portable memory chip, a washer, a dryer, a washer/dryer, a copier, a facsimile machine, a scanner, a multi-functional peripheral device, a wrist watch, a clock, etc. Further, the electronic devices can include unfinished products.

[0093J Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise," "comprising," "include," "including" and the like are W he construed in an inclusive sense, as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including. but not limited to?' The word "coupled", as generally used herein, refers to two or more elements that maybe either directly connected, or connected by wa of one or moie intemicdiate elements Ltkewise, the wo'd "connected", a generally used herein, refers to two or more elements that may be either directly connected, or connected by way of one or nore intermediate elements ddthonally Lie words hcrcni,' above,' "belt w," and;ords of sumhr import, whcn u',ed in mis upolication, shall reler to this application as a whole aid not to any pthculaa portions of Ui s appl catior Where the context permits, words in the above Detailed Description using the singular or plural number -2:3 -may also include the plural or singular number rcspectiveiy The word "or" iii reference to a list of two or more items, that word covers all of the following interpretations of the word: any of the items in the list, all of the items in the list, and any combination of the items in the list, I°Q941 Moreover, conditional language used herein, such as, among others, can," could," "might," "can," "e.g.," "for example," "such as" and the like, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey thai. certain embodiments include, while other embodiments do not include, certain features, elements and/or states. Thus, such conditional language is not generally intended to imply that featuics, &lemcnts and/o" %tate are in any wa reqmrcd for on or mo e embodiments or that one or more embodiments necessarily include logic for deciding, with or ithout author Input or prompting, w tethet these eatures, elerneats 2ndIol states are included or are to be performed in any particular embodiment.

100951 The above detailed description of embodiments of the invention is not intended to be exhaustive or to limit the invention to the precise form disclosed above.

While specific embodiments of, and examples for, the invention are described above fix illustrative purposes, various equivalent modifications are possible within the scope of the invention, as those skilled in the relevant art will recognize. For example, while processes or blocks are presented in a given order, alternative embodiments may peribrm routines having steps or employ systtms}avmg blocks, in a dJ'ferent oidei and om proes'.c or blocks may be deleted, moved, added, subdivided, combined, and/or modified. Each of these processes or blocks may be implemented in a vanety of different ways Also, whie processes or blocks are at times shown as being performed in series, these processes or blocks may instead he pertbrmed in parallel, or may he peribnned at different times.

100961 TIn, teachings of the,n%cnuun piovided herem car be apphed to other systems, not necessarily the system described, above. The elements an.d acts of the various embod melts descnhed ihovc an hc combined to provide hirther emhodimcnt, 100971 While certain embodiments of the inventions have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the disclosure, Indeed, the novel methods, apcaratus. and systems described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the methodb and systems decrtbed herein may be made without departing from the spirit of the disclosure. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the disciosure, :25-.

Claims (4)

1. CLAIMSI. An apparatus compriing: a first switch having at least two throws; a second swhch having at least two throws; a bypass path electrically connecting the first switch and. the second. switch; and a.t least one inductor configured to compensate for a capacitance associated with the bypass path to cause insertion loss of the bypass path to he reduced.
2. 2. The apparatus of claim I wherein the capacitance includes at least one of an.off state capacitance of thc first switch, an off state capacitance of the second switch, or a capacitance of a transmission line of the bypass path.
3. 3. The apparatus of claim 1 012 wherein the at least one inductor includes a first inductor configured to compensate for an off state capacitance of the first switch,
4. 4. The apparatus of claim 3 wherein the off state capacitance of the first switch includes an off state series capacitance and an off state shunt capacitance.S The appara'us of chum or 4 wherein the first sv,itLh i' coupl&d bctween the first inductor and the bypass path.6. The apparatus of claim 3, 4 or S wherein the at least one inductor incktdes a sccond indvcto configuied tr comptnsue for an off state ctpacuance of the cL and swuch 7 11w apparatus of dana 6.he'em the a least one inductor inc1uctc a thra inductor configured to compensate tbr a capacitance of a transmission line of the bypass patit 8 [he apparatus of any pieccc'mg claim whcrein the capacitance includes a capacitance of a Lransmission line of the bypass path.9. The apparatus of any preceding claim further comprising a radio frequency signal path electrically coupled between the first switch and die second switch, the radio frequency signal path configured to process a radio frequency signal.The appatatus of claim 9 wherein the radio frequency stgnal path is a r&ceiv path.ii. The apparatus of claim 9 wherein the radio frequency signal path is a transmit path.12. The apparatus of clahn 9 wherein the first switch is configured to electrically connect an antenna port to the bypass path and electrically isolate the antenata port from the radio frequency signal path in a first state, and the first switch is configured to electrically connect the antenna port to the radio frequency signal path and electrically isolate the antenna port from the bypass path in a second state.13. The apparatus of any preceding claim comprising a diversity module, the diversty nodule rndudrng at least the first switch, the second switch, and the bypass path 14. The atiparatus of claim 13 further comprising a plurality of antennas, the plurality ot antcnnas including a diversity antcnna in corrrnLnicahon with the flist witc i of the diversity module.15. The apparatus of claim 13 or 14 wherein the diversity module includes the at least one inductor, 16. The apparatus of claim 13. 14 or 15 farther comprising an antenna switch module in communication with the second switch.7. An apparatus comprising: a first switch having at least two throws; a second switch having at least two throws; a radio frequency signal path electrically coupled between the first switch and the second switch, the radio frequency signal path configured to process a radio frequency signal; a bypass path electrically coupled, between the first switch and the second switch; and an inductor configured to compensate for an off state capacitance of the first switch to cause insertion loss associated with the bypass path to be reduced.18 [he apparatus of claim 17 {uithe compnsmg a second lndLctor contigured to compensate for an off state capacitance of the second. switch to cause insertion loss associated with the bypass path to be reduce& 19. The apparatus of claim l8furthcr comprising a third inductor configured to compensate for a capacitance of the bypass path to cause insertion. oss associated with the bypass path to he reduced.20. The apparatus of claim 7 1 8 or 19 wherein the inductor has a tunable inductance.21 [he apparatus of any of claims 17 to 20 wr'eiein the mduttor I onligured as a shunt inductor.22. The apparatus of claim 17 further comprising receive paths between the first switch and the second switch., the receive paths including the radio frequency signal path, the first s\1tch being cnhgured to Jectrically onnet an an....nria port to tnt bypass pad' and electrically isolate the antenna port from the receive paths in a first state, and the first switch beag configured to clot t' icaily onneci. the antenna port to a sel&Pd one of the receive paths and electucally iolare the bwass path from the antenna por and other recoist paths of the receive paths in a second state.23. An electronically-implemented method of reducing insertion loss associated with a bypass path, the method comprising: operating a diversity module in a bypass mode such that an input of the aversiw module s coupled to an ouTut ot the di'ersity module by way ot a bypass path that electrically connects a first switch having at least two throws with a second switch having at least two throws; and while operating the diversity module in the bypass mode, substantially canceling capacitance associated with the bypass path to cause insertion loss associated with the bypass mode to he reduced.24, An apparatus substantially as herein described with reference to the accompanying drawings.25. An electronically-implemented method of reducing insertion loss substantially as herein described with reference to the accompanying drawings.